CN215896766U - Coaxial connector - Google Patents

Coaxial connector Download PDF

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Publication number
CN215896766U
CN215896766U CN202120964212.7U CN202120964212U CN215896766U CN 215896766 U CN215896766 U CN 215896766U CN 202120964212 U CN202120964212 U CN 202120964212U CN 215896766 U CN215896766 U CN 215896766U
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plate spring
spring portion
leg
coaxial connector
portions
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CN202120964212.7U
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Chinese (zh)
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常门陆宏
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts

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Abstract

A coaxial connector (10) is provided with a main body (12), a fixed terminal (22), and a movable terminal (20). The fixed terminal includes a base portion (22a) and a contact portion (22 b). The movable terminal includes a base portion (20a), a leaf spring portion (20b), a contact portion (20c), and leg portions (20d1 ). The plate spring portion protrudes from the base portion toward the inner space (S) of the main body and extends toward the contact portion of the fixed terminal. The plate spring portion has an auxiliary contact region (R). The contact portion of the movable terminal is in contact with the contact portion of the fixed terminal from below. The leg portions are provided on both side portions of the plate spring portion. The leg portions are respectively convexly bent in a direction different from a direction in which the plate spring portion extends and extend to contact with a bottom portion of the internal space of the main body.

Description

Coaxial connector
Technical Field
The present invention relates to a coaxial connector.
Background
As a conventional coaxial connector, a coaxial connector described in patent document 1 (international publication No. 2009/157220) is known. The coaxial connector includes a plate-like movable terminal and a plate-like fixed terminal. Fig. 1A and 1B are schematic diagrams of a movable terminal and a fixed terminal of the coaxial connector described in patent document 1. Fig. 1A shows a longitudinal section of the movable terminal 120 and the fixed terminal 122. FIG. 1B shows a cross-section at line IB-IB of FIG. 1A.
Referring to fig. 1A, the fixed terminal 122 includes a base portion 122a and a contact portion 122 b. The base portion 122a is fixed to a main body (not shown) of the coaxial connector. The contact portion 122b protrudes from the base portion 122 a. The movable terminal 120 includes a base portion 120a, a plate spring portion 120b, and a contact portion 120 c. The base 120a is fixed to the body of the coaxial connector. The plate spring portion 120b protrudes from the base portion 120a and extends toward the fixed terminal 122. The contact portion 120c is connected to the tip of the plate spring portion 120b, and overlaps the contact portion 122b below the contact portion 122b of the fixed terminal 122. The contact portion 120c of the movable terminal 120 is in contact with the contact portion 122b of the fixed terminal 122 by the upward elastic force of the plate spring portion 120 b.
In a coaxial connector mounted on a communication device such as a mobile phone, for example, an antenna is connected to the fixed terminal 122, and a transmission/reception circuit is connected to the movable terminal 120. Normally, the contact portion 120c of the movable terminal 120 is in contact with the contact portion 122b of the fixed terminal 122, and thus the transmission/reception circuit is connected to the antenna via the movable terminal 120 and the fixed terminal 122. The communication apparatus is used in this state.
On the other hand, the electrical characteristics of the transmitting/receiving circuit are checked at the time of manufacturing or maintenance of the communication device. A dedicated measuring instrument is used for the examination. In this case, as shown in fig. 1A and 1B, the probe 130 of the coaxial connector to be connected to the measuring instrument enters the coaxial connector from above the plate spring portion 120B of the movable terminal 120 toward the plate spring portion 120B. Also, the probe 130 contacts the plate spring part 120b and directly presses the plate spring part 120 b. Accordingly, the contact portion 120c of the movable terminal 120 is separated from the contact portion 122b of the fixed terminal 122, and the probe 130 is connected to the movable terminal 120. Thereby, the measuring device is connected to the transmission/reception circuit via the probe 130 and the movable terminal 120. In this state, the electrical characteristics of the transceiver circuit are inspected.
Patent document 1: international publication No. 2009/157220
As shown by the solid line in fig. 1B, the probe 130 is normally in contact with the widthwise center of the plate spring portion 120B of the movable terminal 120. However, as shown by the two-dot chain line in fig. 1B, the probe 130 may contact a position of the plate spring portion 120B that is offset from the center in the width direction. When the probe 130 contacts the position of the plate spring portion 120b greatly deviated from the center in the width direction, the probe 130 easily slides from the first contact position further to the outer side in the width direction of the plate spring portion 120 b. In this case, the contact state between the probe 130 and the plate spring portion 120b is more likely to change than when the probe 130 contacts the widthwise center of the plate spring portion 120 b. In other words, the contact resistance between the probe 130 and the movable terminal 120 is easily changed. Therefore, when the electrical characteristics of the transceiver circuit are inspected, the measurement accuracy in a high frequency region such as a millimeter wave region may be impaired. For these reasons, it is desirable to accurately measure the electrical characteristics of the circuit connected to the coaxial connector.
SUMMERY OF THE UTILITY MODEL
Therefore, an object of the present invention is to provide a coaxial connector capable of accurately measuring electrical characteristics of a circuit connected to the coaxial connector.
A coaxial connector according to an embodiment of the present invention includes a body, a fixed terminal, and a movable terminal. The main body has an inner space. A hole communicating with the inner space is formed at an upper portion of the body. The fixed terminal is received in the main body and includes a base portion and a contact portion. The base of the fixed terminal is fixed to the body. The contact portion of the fixed terminal protrudes from the base portion of the fixed terminal toward the inner space of the main body. The movable terminal is accommodated in the main body and includes a base portion, a plate spring portion, a contact portion, and a leg portion. The base of the movable terminal is fixed to the body. The plate spring portion protrudes from the base portion of the movable terminal toward the inner space of the main body and extends toward the contact portion of the fixed terminal. The plate spring portion has an auxiliary contact area intersecting with a center axis of the hole of the main body. The contact portion of the movable terminal is connected to the tip of the plate spring portion and contacts the contact portion of the fixed terminal from below. The leg portions are provided on both side portions of the plate spring portion. The leg portions extend while being bent, protrude in a direction different from the direction in which the plate spring portion extends, and contact the bottom of the internal space of the main body.
In another aspect, a coaxial connector according to an embodiment of the present invention includes a body, a fixed terminal, and a movable terminal. The main body has an inner space. A hole communicating with the inner space is formed at an upper portion of the body. The fixed terminal is received in the main body and includes a base portion and a contact portion. The base of the fixed terminal is fixed to the body. The contact portion of the fixed terminal protrudes from the base portion of the fixed terminal toward the inner space of the main body. The movable terminal is accommodated in the main body and includes a base portion, a plate spring portion, a contact portion, and a leg portion. The base of the movable terminal is fixed to the body. The plate spring portion protrudes from the base portion of the movable terminal in the internal space of the main body and extends toward the contact portion of the fixed terminal. The plate spring portion has an auxiliary contact area intersecting with a center axis of the hole of the main body. The contact portion of the movable terminal is connected to the tip of the plate spring portion and contacts the contact portion of the fixed terminal from below. The leg portions protrude from both side portions of the plate spring portion and contact the bottom portion of the inner space of the main body. When the auxiliary contact area of the plate spring portion is pressed from above by the probe, the pressing portion pressed by the probe is located below the portion of the upper surface of the plate spring portion from which the leg portion protrudes.
The auxiliary contact area in the plate spring portion may be located between the portions of the leg portions that protrude from each other.
A plurality of the leg portions may be provided on both side portions of the plate spring portion, and the leg portions may include: 1 st leg portions protruding from both side portions of the plate spring portion and contacting a bottom portion of the internal space, respectively; and a 2 nd leg portion which is a 2 nd leg portion that protrudes from both side portions of the plate spring portion and contacts with a bottom portion of the internal space, respectively, and is provided adjacent to the 1 st leg portion in the direction in which the plate spring portion extends, in the plate spring portion, the auxiliary contact area is located in a range including an area between portions from which the 1 st leg portion protrudes and an area between portions from which the 2 nd leg portion protrudes.
When the coaxial connector is viewed along the center axis, the direction in which the leg portions extend may be a direction perpendicular to the direction in which the plate spring portion extends.
When the coaxial connector is viewed along the center axis, the direction in which the 1 st leg portion extends and the direction in which the 2 nd leg portion extends may be inclined with respect to the direction in which the plate spring portion extends.
When the coaxial connector is viewed along the center axis, the 1 st leg may be disposed symmetrically with respect to the 2 nd leg with respect to a line passing through the auxiliary contact region and perpendicular to a direction in which the plate spring extends.
When the coaxial connector is viewed along the center axis, an intersection point of the centerlines of the 1 st leg portions and an intersection point of the centerlines of the 2 nd leg portions may coincide with each other.
The leg portions protruding from both side portions of the plate spring portion may be bent inward from each other, respectively.
The leg portions protruding from both side portions of the plate spring portion may be bent downward and further bent outward from each other, respectively.
The leg portions protruding from both side portions of the plate spring portion may be bent downward at an acute angle and further bent outward at an acute angle.
The leg portions protruding from both side portions of the plate spring portion may be bent downward at an obtuse angle and further bent upward at an obtuse angle, respectively.
The leg portions may be connected to side edges of the plate spring portion.
The leg portions may be connected to an upper surface of the plate spring portion.
The leg portions may be connected to lower surfaces of the plate spring portions, respectively.
In the present invention, the portion of one side of the plate spring portion from which the leg portion protrudes may be disposed at a position corresponding to the portion of the other side of the plate spring portion from which the leg portion protrudes in the direction in which the plate spring portion extends.
In the present invention, the portion of one side of the plate spring portion from which the leg portion protrudes may be disposed at a position shifted from the portion of the other side of the plate spring portion from which the leg portion protrudes in the direction in which the plate spring portion extends.
According to the coaxial connector of the embodiment of the present invention, the electrical characteristics of the circuit connected to the coaxial connector can be accurately detected.
Drawings
Fig. 1A is a longitudinal sectional view of a movable terminal and a fixed terminal of a conventional coaxial connector.
FIG. 1B is a cross-sectional view (with probe contact) taken along line IB-IB of FIG. 1A.
Fig. 2A is a view of the coaxial connector according to the embodiment of the present invention as viewed obliquely from above.
Fig. 2B is a view of the coaxial connector according to the embodiment of the present invention as viewed obliquely from below.
Fig. 3A is a view of the coaxial connector exploded and seen from obliquely above.
Fig. 3B is a view of the coaxial connector when it is exploded and viewed obliquely from below.
Fig. 4 is a longitudinal sectional view of the coaxial connector.
Fig. 5A is a plan view of the movable terminal.
Fig. 5B is a rear view of the movable terminal.
Fig. 6 is a longitudinal sectional view of the coaxial connector showing a state when an electrical characteristic of an electrical circuit connected to the coaxial connector is detected.
Fig. 7A is a cross-sectional view of the movable terminal showing an initial state in which the probe is in contact with the movable terminal.
Fig. 7B is a cross-sectional view of the movable terminal showing a state in which the probe is further pushed downward after contacting the movable terminal.
Fig. 8A is a perspective view of a movable terminal provided in the coaxial connector according to modification 1.
Fig. 8B is a plan view of the movable terminal shown in fig. 8A.
Fig. 9A is a perspective view of a movable terminal provided in the coaxial connector according to modification 2.
Fig. 9B is a plan view of the movable terminal shown in fig. 9A.
Fig. 10 is a perspective view of a movable terminal provided in the coaxial connector according to modification 3.
Fig. 11 is a transverse sectional view of a movable terminal according to another modification.
Fig. 12 is a transverse sectional view of a movable terminal according to still another modification.
Fig. 13 is a transverse sectional view of a movable terminal according to still another modification.
Fig. 14 is a transverse sectional view of a movable terminal according to still another modification.
Fig. 15 is a plan view of a movable terminal according to still another modification.
Fig. 16 is a plan view of a movable terminal according to still another modification.
Description of the reference numerals
A coaxial connector; a body; an external terminal; an upper housing; a lower housing; 20. 20A, 20B, 20C, 20D, 20E, 20G, 20H, 20I, 20j.. movable terminal; a base; a leaf spring portion; a contact portion; 20d1, 20d2, 20d3, 20d4, 20d5, 20d6, 20d7, 20d8, 20d9, 20d0... legs; a fixed terminal; a base; a contact portion; a hole; a probe; a bottom; 1 st boundary portion; b2.. 2 nd boundary portion; a central axis; r. auxiliary contact area; s.
Detailed Description
A coaxial connector according to one embodiment includes a body, a fixed terminal, and a movable terminal. The main body has an inner space. A hole communicating with the inner space is formed at an upper portion of the body. The fixed terminal is received in the main body and includes a base portion and a contact portion. The base of the fixed terminal is fixed to the body. The contact portion of the fixed terminal protrudes from the base portion of the fixed terminal toward the inner space of the main body. The movable terminal is accommodated in the main body and includes a base portion, a plate spring portion, a contact portion, and a leg portion. The base of the movable terminal is fixed to the body. The plate spring portion protrudes from the base portion of the movable terminal toward the inner space of the main body and extends toward the contact portion of the fixed terminal. The plate spring portion has an auxiliary contact area intersecting with a center axis of the hole of the main body. The contact portion of the movable terminal is connected to the tip of the plate spring portion and contacts the contact portion of the fixed terminal from below. The leg portions are provided on both side portions of the plate spring portion. The leg portions extend while being bent, protrude in a direction different from the direction in which the plate spring portion extends, and contact the bottom of the internal space of the main body (configuration 1).
According to the coaxial connector of the configuration 1, when the probe of the coaxial connector on the inspection target side contacts the position of the plate spring portion deviated from the center in the width direction in the auxiliary contact region provided in an appropriate range of the plate spring portion (for example, between the leg portions provided on both sides of the plate spring portion as viewed in the vertical direction), the contact position of the probe moves toward the center in the width direction of the plate spring portion as the probe enters. This is because, at a position of the plate spring portion deviated from the center in the width direction, the spring force of the leg portion on the side close to the position among the leg portions provided on both side portions of the plate spring portion acts strongly. Details will be described later.
The probe pin moves to the center of the plate spring part in the width direction, so that the contact state between the probe pin and the plate spring part is stable. In other words, the contact resistance between the probe and the movable terminal is stabilized. Therefore, the measurement accuracy is stable in the measurement of a high frequency region such as a millimeter wave region. Therefore, according to the coaxial connector of the configuration 1, the electrical characteristics of the circuit (for example, a transmission/reception circuit) connected to the coaxial connector can be accurately measured.
In another aspect, a coaxial connector according to one embodiment includes a body, a fixed terminal, and a movable terminal. The main body has an inner space. A hole communicating with the inner space is formed at an upper portion of the body. The fixed terminal is received in the main body and includes a base portion and a contact portion. The base of the fixed terminal is fixed to the body. The contact portion of the fixed terminal protrudes from the base portion of the fixed terminal toward the inner space of the main body. The movable terminal is accommodated in the main body and includes a base portion, a plate spring portion, a contact portion, and a leg portion. The base of the movable terminal is fixed to the body. The plate spring portion protrudes from the base portion of the movable terminal toward the inner space of the main body and extends toward the contact portion of the fixed terminal. The plate spring portion has an auxiliary contact area intersecting with a center axis of the hole of the main body. The contact portion of the movable terminal is connected to the tip of the plate spring portion and contacts the contact portion of the fixed terminal from below. The leg portions protrude from both side portions of the plate spring portion and contact the bottom portion of the inner space of the main body. When the auxiliary contact area of the plate spring portion is pressed from above by the probe, a pressing portion of the upper surface of the plate spring portion pressed by the probe is located below a portion of the upper surface of the plate spring portion, which protrudes from the leg portion (configuration 2).
According to the coaxial connector of the configuration 2, when the auxiliary contact region of the plate spring portion is pressed from above by the probe, the pressing portion pressed by the probe is located below the portion of the upper surface of the plate spring portion protruding from each leg. This means that the plate spring portion is curved convexly downward in a cross section of the plate spring portion. In this state, at the contact position of the probe, the elastic force of the leg portion on the side close to the contact position of the probe among the leg portions protruding from both side portions of the plate spring portion acts strongly. Thereby, the contact position of the probe moves toward the center in the width direction of the plate spring portion. Therefore, according to the coaxial connector of the 2 nd configuration, the same effects as those of the coaxial connector of the 1 st configuration can be obtained.
Preferably, in the coaxial connector of the 1 st or 2 nd configuration, the auxiliary contact area in the plate spring portion is located between the portions from which the leg portions project (the 3 rd configuration). In this configuration, the probe pin contacting the auxiliary contact region at a position offset from the widthwise center of the plate spring portion can be easily moved toward the widthwise center of the plate spring portion.
In the coaxial connector according to claim 1 or 2, the leg portion may be provided in plural on both sides of the plate spring portion. In this case, the legs can include a 1 st leg and a 2 nd leg. The 1 st leg and the 2 nd leg protrude from both side portions of the plate spring portion and contact the bottom of the internal space, respectively. The 2 nd leg portion is provided adjacent to the 1 st leg portion in the direction in which the plate spring portion extends. In the plate spring portion, it is preferable that the auxiliary contact area is located in a range including an area between the 1 st leg portion protruding portions and an area between the 2 nd leg portion protruding portions (the 4 th structure). In this configuration, the probe pin contacting the auxiliary contact region at a position offset from the widthwise center of the plate spring portion can be easily moved toward the widthwise center of the plate spring portion.
In any of the coaxial connectors according to the 1 st to 4 th configurations, the direction in which the leg portions extend may be a direction perpendicular to a direction in which the plate spring portion extends when the coaxial connector is viewed along the center axis of the hole of the body (the 5 th configuration). In the coaxial connector of the 4 th configuration, when the coaxial connector is viewed along the center axis of the hole of the body, the direction in which the 1 st leg portion extends and the direction in which the 2 nd leg portion extends may be inclined with respect to the direction in which the plate spring portion extends (the 6 th configuration). Depending on the configuration of the coaxial connector, the 5 th structure or the 6 th structure can be appropriately adopted in consideration of the space in which the leg portion can be disposed.
Preferably, in the coaxial connector of the 6 th configuration, when the coaxial connector is viewed along the center axis of the hole of the main body, the 1 st leg portion is disposed symmetrically with respect to the 2 nd leg portion with respect to a line passing through the auxiliary contact region and perpendicular to the direction in which the plate spring portion extends (the 7 th configuration). In this structure, the portion of the plate spring portion in the vicinity of the contact position of the probe in the auxiliary contact region does not incline extremely in the longitudinal section. This makes the contact state between the probe and the plate spring portion more stable.
In the coaxial connector according to the 6 th or 7 th configuration, when the coaxial connector is viewed along the center axis of the hole of the body, the intersection point of the center lines of the 1 st leg and the 2 nd leg may coincide with each other (the 8 th configuration). In this case, the region on which the elastic force generated by the 1 st leg and the elastic force generated by the 2 nd leg act can be concentrated around the intersection. Therefore, the contact state between the probe and the plate spring portion is further stabilized.
In any of the coaxial connectors according to the first to 8 configurations, the shape of the leg portions projecting from both side portions of the plate spring portion is, for example, as follows. The legs are bent inwardly toward each other (configuration 9). The legs are bent downward and further outward from each other, respectively (configuration 10). The legs are bent downward at an acute angle, respectively, and further bent outward at an acute angle to each other (11 th configuration). The legs are bent downward at an obtuse angle and further upward at an obtuse angle, respectively (structure 12). According to the structure of the coaxial connector, any one of the 9 th to 12 th structures can be appropriately adopted in consideration of the space in which the leg portion can be disposed and in consideration of the elastic force to be given to the leg portion of the plate spring portion.
In any of the coaxial connectors according to the first to 12 configurations, the connection portion of the leg portion with respect to the plate spring portion can be changed as appropriate. For example, the leg portions may be connected to side edges of the plate spring portion, respectively (structure 13). Alternatively, the leg portions may be connected to the upper surfaces of the plate spring portions, respectively (structure 14). The leg portion can also be connected to the lower surface of the plate spring portion (15 th structure).
In any of the coaxial connectors according to the first to 15 configurations, a portion of one side of the plate spring portion from which the leg portion protrudes may be disposed at a position corresponding to a portion of the other side of the plate spring portion from which the leg portion protrudes in a direction in which the plate spring portion extends (the 16 th configuration). In any of the coaxial connectors according to the first to 15 configurations, a portion of one side of the plate spring portion from which the leg portion protrudes may be disposed at a position shifted from a portion of the other side of the plate spring portion from which the leg portion protrudes in a direction in which the plate spring portion extends (the 17 th configuration).
Hereinafter, a coaxial connector according to an embodiment of the present invention will be described in detail with reference to the drawings. The same or corresponding portions in the drawings are denoted by the same reference numerals, and overlapping description will not be repeated. In the present specification, the longitudinal section refers to a section along the longitudinal direction of the movable terminal. The longitudinal direction of the movable terminal refers to the direction in which the movable terminal extends. The cross section is a section perpendicular to the longitudinal direction of the movable terminal.
Coaxial connector
Fig. 2A and 2B are perspective views of a coaxial connector 10 according to an embodiment of the present invention. Fig. 3A and 3B are exploded perspective views of the coaxial connector 10. Fig. 2A and 3A show the coaxial connector 10 when viewed from obliquely above. Fig. 2B and 3B show views of the coaxial connector 10 when viewed obliquely from below. Fig. 4 is a longitudinal sectional view of the coaxial connector 10.
The coaxial connector 10 includes a body 12, a movable terminal 20, and a fixed terminal 22. The main body 12 includes a lower case 18, an upper case 16, and an external terminal 14. The external terminal 14, the movable terminal 20, and the fixed terminal 22 are made of metal and have conductivity. The external terminal 14, the movable terminal 20, and the fixed terminal 22 are made of, for example, SUS301(JIS standard) stainless steel. The lower case 18 and the upper case 16 are made of, for example, resin, and have electrical insulation properties.
Upper case 16 and external terminal 14 are stacked in this order on lower case 18. The direction in which the external terminal 14, the upper case 16, and the lower case 18 overlap is referred to as the vertical direction. The side on which external terminal 14 is disposed with respect to lower case 18 is referred to as the upper side, and the side on which lower case 18 is disposed with respect to external terminal 14 is referred to as the lower side.
The movable terminal 20 and the fixed terminal 22 are arranged in a predetermined direction when viewed in the vertical direction. The arrangement direction of the movable terminals 20 and the fixed terminals 22 as viewed in the vertical direction is referred to as the front-rear direction. The side where the movable terminal 20 is arranged with respect to the fixed terminal 22 is referred to as the front side, and the side where the fixed terminal 22 is arranged with respect to the movable terminal 20 is referred to as the rear side. The direction orthogonal to the up-down direction and the front-back direction is taken as the left-right direction. When viewed from above, a direction rotated clockwise by 90 ° from the front is referred to as the right, and a direction rotated counterclockwise by 90 ° from the front is referred to as the left.
The up, down, front, rear, right and left, and the up, down, front, rear, right and left directions defined as above are used only for convenience of description, and are not related to the actual orientation of the coaxial connector of the present invention.
The length of the coaxial connector 10 in the vertical direction is, for example, 0.9mm, although not particularly limited. Although not particularly limited, the length of the coaxial connector 10 in the front-rear direction and the length in the left-right direction are both 2mm, for example.
Referring to fig. 3A and 3B, lower case 18 is a substantially rectangular plate-like member in plan view. The lower case 18 includes, for example, a pair of sides in the front-rear direction and a pair of sides in the left-right direction. The upper surface of the lower case 18 is provided with convex strips 52a and 52b for positioning with the upper case 16. The convex strips 52a, 52b extend in the front-rear direction and are provided at the right and left ends, respectively, of the upper surface of the lower case 18. A notch 54 is formed in the center portion in the left-right direction at the front end of the lower case 18. The front end portion 20F of the movable terminal 20 is exposed to the outside of the body 12 through the notch 54. Similarly, a notch 55 is formed in the rear end of the lower case 18 and in the center in the left-right direction. The rear end portion 22B of the fixed terminal 22 is exposed to the outside of the body 12 through the notch 55.
A projection 56 is provided on the upper surface of the lower case 18 in the vicinity of the notch 54. The protrusion 56 is responsible for positioning the movable terminal 20. Holes 53a, 53b penetrating the lower case 18 in the thickness direction (vertical direction) are formed on the right and left sides of the projection 56, respectively, when viewed in the vertical direction. The upper surface of lower housing 18 has a fixing surface 57 for fixing movable terminal 20. The fixing surface 57 is located between the notch 54 and the protrusion 56 on the front side in the front-rear direction. In addition, the upper surface of lower housing 18 has a fixing surface 58 for fixing terminal 22. The fixing surface 58 is an upper surface of a mesa portion protruding from a bottom portion B (see fig. 4) of the internal space S described later. The mesa portion is located on the front side of the notch 55 in the vicinity of the notch 55 on the rear side.
Referring to fig. 3A, upper case 16 includes cylindrical portion 34 and cover portion 35. The cover 35 is a plate-like member. The right end of cover 35 has a shape complementary to the left end of rib 52a of lower case 18 when viewed in the up-down direction. Similarly, the left end of cover 35 has a shape complementary to the right end of rib 52b of lower housing 18. Cover portion 35 fits into lower case 18 and covers the portion of lower case 18 between ribs 52a and 52 b. Referring to fig. 4, an inner space S is formed between the lower case 18 and the upper case 16.
The cylindrical portion 34 of the upper case 16 protrudes upward from the center of the upper surface of the cover portion 35. The upper case 16 is formed with a hole 34a penetrating the upper case 16 in the vertical direction. The hole 34a includes a space inside the cylindrical portion 34. The center axis C of the hole 34a is along the up-down direction. In this embodiment, the hole 34a is circular in a cross section perpendicular to the up-down direction of the upper case 16. In this case, the central axis C passes through the center of the circle. In a cross section perpendicular to the vertical direction of the upper case 16, the hole 34a may be rectangular. In this case, the central axis C passes through the intersection of two diagonal lines of the rectangle. The cylindrical portion 34 has a bowl-like shape with an opening cross-sectional area that increases toward the upper side.
Referring to fig. 3B, two cylindrical protrusions 36a, 36B protruding downward are provided on the lower surface of the upper housing 16 (cover portion 35). The projections 36a, 36b are provided at positions corresponding to the holes 53a, 53b of the lower case 18, respectively, when viewed in the up-down direction. The projections 36a, 36b are inserted into the holes 53a, 53b of the lower case 18, respectively. Thereby, the upper case 16 and the lower case 18 are positioned with respect to each other.
The lower surface of the upper case 16 (cover portion 35) has a fixing surface 37. When viewed in the vertical direction, the fixing surface 37 is disposed at a position overlapping with a fixing surface 57 (see fig. 3A) of the lower case 18. The portion (base portion 20a described later) of movable terminal 20 near distal end 20F is sandwiched and fixed by fixing surface 37 of upper housing 16 and fixing surface 57 of lower housing 18. Similarly, the lower surface of the upper case 16 (cover portion 35) has a fixing surface 39. When viewed in the vertical direction, the fixing surface 39 is disposed at a position overlapping with a fixing surface 58 (see fig. 3A) of the lower case 18. A portion (a base portion 22a described later) near the rear end portion 22B of the fixed terminal 22 is sandwiched and fixed by the fixing surface 39 of the upper case 16 and the fixing surface 58 of the lower case 18.
The external terminal 14 is in contact with an outer conductor of the inspection target coaxial connector, and normally functions as a ground (earth) terminal. As shown in fig. 2A and 2B, the external terminal 14 includes a flat portion 31, a cylindrical portion 32, and protruding portions 33a and 33B. The external terminal 14 is made of a plate of stainless steel (e.g., SUS301), for example. The external terminal 14 can be formed by subjecting a plate to various processes such as punching, bending, and drawing, for example. The outer surface of the external terminal 14 is plated as necessary.
The flat portion 31 is plate-shaped, and covers the hood portion 35 of the upper case 16 from above. The flat portion 31 is substantially rectangular when viewed in the up-down direction. The flat portion 31 includes, for example, a pair of sides along the front-rear direction and a pair of sides along the left-right direction. The flat portion 31 is provided with projections 33a and 33b on the right and left sides thereof, respectively. The protruding portions 33a and 33b are formed by partially bending a plate-like body extending in the left-right direction from the flat portion 31. Specifically, as shown in fig. 2B, the projections 33a and 33B are bent so as to wrap around the lower surface of the lower case 18. Thereby, the external terminal 14, the upper case 16, and the lower case 18 are fixed to each other.
A cylindrical portion 32 protruding upward is provided at the center of the flat portion 31. An outer conductor (not shown) of the inspection target coaxial connector is fitted around the cylindrical portion 32. The cylindrical portion 32 is coaxial with the cylindrical portion 34 of the upper case 16 and fitted around the cylindrical portion 34. Thus, a hole 34a is formed in the upper portion of the body 12. The hole 34a communicates with the internal space S (see fig. 4).
Next, the movable terminal 20 and the fixed terminal 22 will be described with reference to fig. 3A, 4, 5A, and 5B. Fig. 5A is a plan view of the movable terminal 20. Fig. 5B is a rear view of the movable terminal 20. The movable terminal 20 and the fixed terminal 22 are plate-shaped members made of metal, respectively. The movable terminal 20 and the fixed terminal 22 can be formed by performing various processes such as punching and bending on a flat plate-shaped metal plate, for example. The movable terminal 20 and the fixed terminal 22 are housed in the main body 12.
The fixed terminal 22 includes a base portion 22a and a contact portion 22b. The base portion 22a is a portion connected to the rear side of the contact portion 22b, and is on substantially the same plane as the contact portion 22b. Base 22a is sandwiched between fixing surface 58 of lower housing 18 and fixing surface 39 of upper housing 16. Thereby, the fixed terminal 22 is fixed to the body 12. In the fixed terminal 22, a portion (rear end portion 22B) on the rear side of the base portion 22a is exposed to the outside of the main body 12 through the notch 55. The contact portion 22b is a portion near the tip of the fixed terminal 22. The contact portion 22b protrudes from the base portion 22a into the internal space S of the main body 12. The fixing surface 58 is an upper surface of a mesa portion protruding from the bottom B of the internal space S, and thus the contact portion 22B is separated from the bottom B of the internal space S (the upper surface of the lower case 18).
The movable terminal 20 is a plate-like member having spring property (elasticity). The movable terminal 20 includes a base portion 20a, a plate spring portion 20b, a contact portion 20c, and a pair of leg portions 20d1, 20d 1. The base portion 20a is a portion in the vicinity of the tip portion 20F of the movable terminal 20. The base 20a is sandwiched between the fixing surface 57 of the lower case 18 and the fixing surface 37 of the upper case 16. Thereby, the movable terminal 20 is fixed to the body 12. The movable terminal 20 is exposed to the outside of the body 12 through the notch 54 at a portion (distal end portion 20F) on the distal end side of the base portion 20a.
The plate spring portion 20b protrudes from the base portion 20a toward the internal space S of the main body 12, and extends toward the contact portion 22b of the fixed terminal 22. The plate spring portion 20b has an auxiliary contact region R. The auxiliary contact region R intersects the central axis C of the hole 34a of the body 12. The contact portion 20c is a portion near the rear end of the movable terminal 20, and is connected to the tip end of the plate spring portion 20b. The contact portion 20c is overlapped below the contact portion 22b of the fixed terminal 22. The movable terminal 20 is flexed so that the plate spring portion 20B and the contact portion 20c are separated from the bottom portion B of the internal space S (the upper surface of the lower case 18). In the example of this embodiment, the plate spring portion 20b and the contact portion 20c are almost parallel to the upper surface of the lower case 18. The contact portion 20c is in contact with the lower surface of the contact portion 22b of the fixed terminal 22 by the upward elastic force of the plate spring portion 20b. From another viewpoint, the contact portion 20c contacts the contact portion 22b of the fixed terminal 22 from below.
A hole 45 is formed in the plate spring portion 20b in the vicinity of the base portion 20a. The projection 56 of the lower case 18 is inserted into the hole 45. Thereby, the movable terminals 20 are positioned in the front-rear direction and the left-right direction with respect to the lower housing 18.
In this embodiment, the plate spring portion 20b is provided with a pair of leg portions 20d1, 20d 1. The pair of leg portions 20d1, 20d1 protrude from both side portions of the plate spring portion 20B, respectively, and contact the bottom portion B of the internal space S (the upper surface of the lower case 18). More specifically, the leg portions 20d1 and 20d1 are provided on both sides of the plate spring portion 20b. The leg portions 20d1 and 20d1 are connected to side edges of the plate spring portion 20b, respectively. That is, one leg portion 20d1 of the two leg portions 20d1, 20d1 is connected to one side edge of the plate spring portion 20b, and the other leg portion 20d1 is connected to the other side edge of the plate spring portion 20b. The leg portions 20d1, 20d1 may be integrally formed with the plate spring portion 20b, or may be separately formed from the plate spring portion 20b and then joined to the plate spring portion 20b. The leg portions 20d1, 20d1 are curved and extend so as to protrude in a direction different from the direction in which the plate spring portion 20b extends (front-rear direction). In other words, the direction along which the portions having curvature in the leg portions 20d1, 20d1 extend is different from the direction in which the plate spring portion 20b extends. The legs 20d1 and 20d1 are in contact with the bottom B of the internal space S of the main body 12. From another point of view, the leg portions 20d1, 20d1 extend in a direction different from the direction in which the plate spring portion 20B extends (front-rear direction) and are bent toward the bottom B of the internal space S.
Referring to fig. 5A, when the coaxial connector 10 is viewed along the center axis C of the hole 34a (see fig. 4) of the main body 12, that is, when the coaxial connector 10 is viewed in the vertical direction, the direction in which each of the leg portions 20d1 and 20d1 extends is a direction (left-right direction) substantially perpendicular to the direction in which the plate spring portion 20b extends (front-rear direction). In the example shown in fig. 5A, the leg portions 20d1, 20d1 are arranged on the same straight line extending in the left-right direction when viewed in the up-down direction. That is, when the movable terminal 20 is viewed in the vertical direction, the portions of the plate spring portion 20b from which the leg portions 20d1, 20d1 protrude are disposed at positions symmetrical to each other with respect to the center line LC in the width direction of the plate spring portion 20b. In other words, the portion of the one side of the plate spring portion 20b from which the one leg portion 20d1 protrudes is disposed at a position corresponding to the portion of the other side of the plate spring portion 20b from which the other leg portion 20d1 protrudes in the direction in which the plate spring portion 20b extends.
In the plate spring portion 20b, the auxiliary contact region R is a region to which a probe of the counterpart coaxial connector can be brought into contact. In fig. 5A, a portion (hereinafter, referred to as "1 st boundary portion") B1 from which the leg portions 20d1, 20d1 protrude respectively in the side portion of the plate spring portion 20B is shown by a two-dot chain line. The 1 st boundary portion B1 is a boundary portion (connection portion) between the plate spring portion 20B and each of the leg portions 20d1, 20d 1. In the present embodiment, the two 1 st boundary portions B1 face each other in the width direction (left-right direction) of the plate spring portion 20B. The auxiliary contact regions R are located between the 1 st boundary portions B1.
Referring to fig. 5B, the legs 20d1, 20d1 are bent inward toward each other. More specifically, the leg portions 20d1, 20d1 extend outward in the left-right direction from the side portions of the plate spring portion 20b, and further, are curved in a semicircular shape in a plane along the up-down direction at the tip (end portion on the opposite side from the plate spring portion 20b) side portions. The portions including the distal ends of the legs 20d1, 20d1 approach each other as they approach the distal ends.
Assembling method of coaxial connector
The coaxial connector 10 is assembled as follows, for example. The fixed terminal 22 is aligned and attached to the upper case 16, and thereafter, the movable terminal 20 is aligned and attached to the upper case 16. Thereby, the upper surface of the contact portion 20c of the movable terminal 20 is brought into contact with the lower surface of the contact portion 22b of the fixed terminal 22. In this stage, the protruding portions 33a and 33b of the external terminal 14 extend in the same plane as the flat portion 31 without being bent.
Next, the external terminal 14 is mounted to the upper case 16 from the upper side. At this time, the cylindrical portion 34 of the upper housing 16 is inserted into the cylindrical portion 32 of the external terminal 14. Thereafter, the upper housing 16 and the external terminals 14 are stacked on top of the lower housing 18. At this time, the projections 36a, 36b of the upper case 16 are inserted into the holes 53a, 53b of the lower case 18, respectively. Finally, the projections 33a and 33b of the external terminal 14 are bent so as to wrap around the lower surface of the lower case 18. Thereby, the coaxial connector 10 having the configuration shown in fig. 2A and 2B is obtained.
The coaxial connector 10 is mounted on a communication device such as a mobile phone. In this case, for example, an antenna of the communication device is connected to a portion (rear end portion 22B) of the fixed terminal 22 exposed to the outside of the main body 12. The transceiver circuit of the communication device is connected to a portion (distal end portion 20F) of the movable terminal 20 exposed to the outside of the main body 12. Referring to fig. 4, since the contact portion 20c of the movable terminal 20 is in contact with the contact portion 22b of the fixed terminal 22, the transceiver circuit is connected to the antenna via the movable terminal 20 and the fixed terminal 22. The communication apparatus is used in this state.
Coaxial connector operation
Next, the operation of the coaxial connector 10 will be described with reference to fig. 6. At the time of manufacturing or maintenance of the communication device, for example, the electrical characteristics of the transmission/reception circuit are checked. A dedicated measuring instrument is used for the examination. Fig. 6 is a longitudinal sectional view of the coaxial connector 10 showing a state when an electrical characteristic of an electrical circuit connected to the coaxial connector 10 is detected. When the electrical characteristics of the transceiver circuit connected to the coaxial connector 10 are inspected, the probe 130 of the coaxial connector to be connected to the measuring device is inserted into the hole 34a of the coaxial connector 10 from above. In fig. 6, the outer conductor of the target coaxial connector is not shown.
As shown in fig. 6, the probe 130 of the counterpart coaxial connector enters the coaxial connector 10 from above the plate spring portion 20b of the movable terminal 20 toward the plate spring portion 20b. The probe 130 contacts the plate spring portion 20b, and directly presses the plate spring portion 20b. Thereby, the contact portion 20c of the movable terminal 20 is separated from the contact portion 22b of the fixed terminal 22. As a result, the movable terminal 20 and the fixed terminal 22 are electrically disconnected from each other, and the probe 130 is electrically connected to the movable terminal 20. The outer conductor of the counterpart coaxial connector is fitted to the external terminal 14, and the outer conductor is electrically connected to the external terminal 14. Thereby, the measuring device is connected to the transmission/reception circuit via the probe 130 and the movable terminal 20. In this state, the electrical characteristics of the transceiver circuit are inspected.
After the inspection, when the coaxial connector to be inspected is removed from the coaxial connector 10, the upward elastic force of the plate spring portion 20b returns the position of the contact portion 20c in the vertical direction to the upper side (see fig. 4). Thereby, the contact portion 20c of the movable terminal 20 comes into contact with the contact portion 22b of the fixed terminal 22. As a result, the movable terminal 20 is electrically connected to the fixed terminal 22 again, and the electrical connection between the probe 130 and the movable terminal 20 is disconnected. Thereby, the transmission/reception circuit is connected to the antenna via the movable terminal 20 and the fixed terminal 22. In other words, the communication device is enabled to use.
Effect
Hereinafter, an effect of the coaxial connector 10 of the present embodiment will be described. Fig. 7A and 7B are cross-sectional views of the movable terminal 20 showing the state at the time of inspection. Fig. 7A and 7B show the plate spring portion 20B and the leg portions 20d1, 20d1 including the auxiliary contact region R. Fig. 7A shows a state at the moment when the probe 130 just starts to contact the movable terminal 20, that is, the descending probe 130 contacts the movable terminal 20. Fig. 7B shows a state in which the probe 130 is further pushed downward after contacting the auxiliary contact region R of the movable terminal 20.
As shown in fig. 7A, the probe 130 may contact a position largely deviated from the center of the plate spring portion 20b in the width direction (left-right direction). In the present embodiment, in the portion near the auxiliary contact region R of the movable terminal 20, both side portions in the width direction of the plate spring portion 20b are elastically supported by the leg portions 20d1, 20d1, and the plate spring portion 20b itself is elastically deformable. Therefore, as shown in fig. 7B, when the probe 130 is further pushed downward after contacting the auxiliary contact region R of the plate spring portion 20B, the plate spring portion 20B and the leg portions 20d1 and 20d1 are deformed. Specifically, the leg portions 20d1, 20d1 are compressively deformed in the vertical direction. On the other hand, the plate spring portion 20b bends the contact CP with the probe 130 and its vicinity to protrude downward. In other words, in the cross section of the plate spring portion 20b, the plate spring portion 20b is convexly curved downward.
Referring to fig. 7A, a case where the probe 130 is pressed downward by contacting the probe 130 with a position shifted rightward from the center of the plate spring portion 20b in the width direction (left-right direction) is considered. In this case, the spring force of the right leg portion 20d1 close to the contact CP acts stronger than the spring force of the left leg portion 20d1 at the first contact CP with the probe 130 and its vicinity in the plate spring portion 20b. Thus, in the cross section of the plate spring portion 20b, the portion on the left side of the plate spring portion 20b is lowered downward than the portion on the right side of the contact CP at the downwardly convexly curved portion. In other words, in the cross section of the plate spring portion 20b, the contact point CP and the vicinity thereof are inclined downward to the left. Therefore, the probe 130 slides on the plate spring portion 20b along the inclination of the plate spring portion 20b. When the probe 130 is further pushed downward, the contact CP moves to the left, that is, toward the center in the width direction (left-right direction) of the plate spring portion 20b.
When the contact CP reaches the widthwise center of the plate spring portion 20b, the spring force acting from the left leg portion 20d1 with respect to the contact CP is the same as the spring force acting from the right leg portion 20d 1. Therefore, in the cross section of the plate spring portion 20b, the inclination of the contact CP and the vicinity thereof substantially disappears. As a result, the contact CP does not move further in the left-right direction. That is, when the probe 130 is sufficiently pushed downward, the position of the contact CP is finally maintained at the center in the width direction of the plate spring portion 20b. Fig. 7B shows the movement direction of the probe 130 with the movement of the contact CP by an arrow.
In the above, the case where the probe 130 first contacts the position of the plate spring portion 20b deviated rightward from the center in the width direction in the cross section of the plate spring portion 20b is described. When the probe 130 first contacts the position of the plate spring portion 20b deviated leftward from the widthwise center, the position of the contact CP is maintained by moving to the widthwise center of the plate spring portion 20b according to the same principle.
In a state where the plate spring portion 20B is pressed by the probe 130, the upper surface of the plate spring portion 20B is located on the lower side (forward in the insertion direction of the probe 130) than the 1 st boundary portion B1 on the contact point CP side. This state can be obtained by both ends of the auxiliary contact region R being supported by the leg portions 20d1, 20d1 in the width direction of the plate spring portion 20b.
In the movable terminal 120 of the conventional coaxial connector, both side portions of the movable terminal 120 are not supported at all at least in the periphery of the portion where the probe 130 contacts (see fig. 1A and 1B). Therefore, when the probe 130 contacts the position of the plate spring portion 120b greatly deviated from the center in the width direction, the probe 130 easily slides from the first contact position further to the outer side in the width direction of the plate spring portion 120 b. This is because the plate spring portion 120b is twisted around the longitudinal axis of the plate spring portion 120b, and the plate spring portion 120b is inclined so as to lower the widthwise outer side in the cross section of the plate spring portion 120 b.
In the coaxial connector 10 of the present embodiment, the both side portions of the plate spring portion 20b are supported by the leg portions 20d1, 20d1, and the torsion of the plate spring portion 20b can be suppressed from occurring around the longitudinal axis of the plate spring portion 20b.
The above-described mechanism substantially works if the position where the probe pin 130 first contacts the plate spring portion 20B is within the auxiliary contact region R (in this embodiment, the region between the 1 st boundary portions B1 when viewed in the up-down direction). Therefore, the final contact CP is maintained at the center in the width direction of the plate spring portion 20b, regardless of where the probe 130 is substantially in contact with the auxiliary contact region R at the first time. Therefore, the contact state between the probe 130 and the plate spring portion 20b is stabilized. In other words, the contact resistance between the probe 130 and the movable terminal 20 is stable. Thus, the measurement accuracy is stabilized in the measurement of a high frequency region such as a millimeter wave region. Therefore, the electrical characteristics of the circuit (transmission/reception circuit) connected to the coaxial connector 10 can be accurately measured.
When the plate spring portion 20b is pressed by the probe 130, the contact CP between the plate spring portion 20b and the probe 130 and the portion in the vicinity thereof may be deformed to protrude downward in the longitudinal direction (front-rear direction) as well as in the width direction (left-right direction).
(modification 1)
Fig. 8A is a perspective view of a movable terminal 20A provided in the coaxial connector according to modification 1. Fig. 8B is a plan view of the movable terminal 20A. The movable terminal 20A can be used by applying the above-described substitute for the movable terminal 20 to the coaxial connector 10 according to the above-described embodiment.
The movable terminal 20A of modification 1 is different from the movable terminal 20 of the above-described embodiment in that a plurality of leg portions are provided on both side portions of the plate spring portion 20b. In the movable terminal 20A, the plurality of legs provided to the plate spring portion 20b include the 1 st leg 20d1, 20d1 and the 2 nd leg 20d2, 20d 2. That is, the movable terminal 20A includes a pair of 1 st leg portions 20d1, 20d1 and a pair of 2 nd leg portions 20d2, 20d 2. Like the leg portions 20d1, 20d1 described in the above embodiment, the 1 st leg portions 20d1, 20d1 respectively protrude from both side portions of the plate spring portion 20B and contact the bottom B (see fig. 4) of the internal space S of the main body 12 of the coaxial connector. Like the 1 st legs 20d1, 20d1, the 2 nd legs 20d2, 20d2 also protrude from both side portions of the plate spring portion 20B, respectively, and contact the bottom B (see fig. 4) of the internal space S of the main body 12 of the coaxial connector. The 2 nd leg portions 20d2, 20d2 are provided adjacent to the 1 st leg portions 20d1, 20d1 in the direction in which the plate spring portion 20b extends (front-rear direction). In other words, in each side portion of the plate spring portion 20b, the 1 st leg portion 20d1 and the 2 nd leg portion 20d2 are aligned in the front-rear direction. The 2 nd legs 20d2, 20d2 are provided on the rear side of the 1 st legs 20d1, 20d 1. Like the leg portions 20d1 and 20d1 of the above embodiment, the leg portions 20d1, 20d1, 20d2, and 20d2 are connected to the side edges of the plate spring portion 20b, respectively.
In the 1 st modification, the auxiliary contact region R is located in a range including a region between the 1 st boundary portions B1 and a region between the 2 nd boundary portions B2. The 1 st boundary portion B1 is a boundary portion (connection portion) between the plate spring portion 20B and each of the 1 st leg portions 20d1, 20d 1. In other words, the 1 st boundary portion B1 refers to a portion from which the 1 st leg portion 20d1, 20d1 in the side portion of the plate spring portion 20B protrudes, respectively. In this modification, when the movable terminal 20A is viewed in the up-down direction, the 1 st leg portions 20d1, 20d1 of the plate spring portion 20B protrude from each other, in other words, the 1 st boundary portion B1 is disposed at a position symmetrical to the center line LC in the width direction of the plate spring portion 20B. That is, the portion of the one side of the plate spring part 20b from which the one 1 st leg part 20d1 protrudes is disposed at a position corresponding to the portion of the other 1 st leg part 20d1 of the other side of the plate spring part 20b in the direction in which the plate spring part 20b extends.
The 2 nd boundary portion B2 is a boundary portion (connection portion) between the plate spring portion 20B and each of the 2 nd leg portions 20d2, 20d 2. In other words, the 2 nd boundary portion B2 refers to a portion from which the pair of 2 nd leg portions 20d2, 20d2 protrude respectively in the side portion of the plate spring portion 20B. In this modification, when the movable terminal 20A is viewed in the up-down direction, the 2 nd leg portions 20d2, 20d2 of the plate spring portion 20B protrude from each other, in other words, the 2 nd boundary portion B2 is disposed at a position symmetrical to the center line LC in the width direction of the plate spring portion 20B. That is, a portion of one side of the plate spring part 20b from which the one 2 nd leg part 20d2 protrudes is disposed at a position corresponding to a portion of the other side of the plate spring part 20b from which the other 2 nd leg part 20d2 protrudes in the direction in which the plate spring part 20b extends. In the example shown in fig. 8B, the auxiliary contact region R is located rearward of the front end of the 1 st boundary portion B1 and forward of the rear end of the 2 nd boundary portion B2 in the front-rear direction.
When the coaxial connector is viewed along the center axis C of the hole 34a (see fig. 4) of the main body 12, that is, when the coaxial connector is viewed in the up-down direction, the direction in which the 1 st leg portions 20d1, 20d1 extend is inclined with respect to the direction in which the plate spring portion 20b extends (front-rear direction). The direction in which each of the 2 nd leg portions 20d2, 20d2 extends is inclined with respect to the direction in which the plate spring portion 20b extends (front-rear direction). That is, when viewed in the vertical direction, the extending direction of each of the leg portions 20d1, 20d1, 20d2, and 20d2 does not coincide with the extending direction of the leaf spring portion 20b or the direction (the left-right direction) orthogonal to the extending direction of the leaf spring portion 20b. Further, the two 1 st legs 20d1, 20d1 are disposed substantially symmetrically with respect to a line LS passing through the auxiliary contact region R and perpendicular to the direction in which the plate spring portion 20b extends (the front-rear direction) with respect to the two 2 nd legs 20d2, 20d2 when viewed in the vertical direction. In other words, when the line LS is in place in the front-rear direction, the two 1 st legs 20d1, 20d1 and the pair of 2 nd legs 20d2, 20d2 exist symmetrically with respect to the line LS.
When viewed in the vertical direction, the intersection point of the center lines LC1 of the 1 st leg portions 20d1 and 20d1 and the intersection point of the center lines LC2 of the 2 nd leg portions 20d2 and 20d2 substantially coincide with each other. Therefore, when viewed in the vertical direction, the leg portions 20d1, 20d1, 20d2, and 20d2 radially extend around a point in the auxiliary contact region R. Thus, the regions in which the elastic force generated by the pair of 1 st leg portions 20d1, 20d1 and the elastic force generated by the 2 nd leg portions 20d2, 20d2 act can be concentrated around the intersection. In this modification, when viewed in the vertical direction, the intersection point of the center lines LC1 of the 1 st leg portions 20d1 and 20d1 and the intersection point of the center lines LC2 of the 2 nd leg portions 20d2 and 20d2 are disposed on the center axis C of the hole 34a (see fig. 4) of the main body 12.
Referring to fig. 8A, like the legs 20d1, 20d1 of the movable terminal 20 shown in fig. 5B, the 1 st leg 20d1, 20d1 and the 2 nd leg 20d2, 20d2 are bent inward from each other.
The coaxial connector provided with the movable terminal 20A can achieve the same effects as those of the above-described coaxial connector 10 when the probe first contacts the inside of the auxiliary contact region R of the plate spring portion 20b. In the first modification 1, the movable terminal 20A includes the 1 st leg portions 20d1 and 20d1 and the 2 nd leg portions 20d2 and 20d2, and thus the auxiliary contact area R can be increased with respect to the movable terminal 20 (see fig. 5A and 5B). Further, since the movable terminal 20A includes the 1 st leg portions 20d1 and 20d1 and the 2 nd leg portions 20d2 and 20d2, the spring force generated by the respective leg portions 20d1, 20d1, 20d2 and 20d2 can be increased, and the above-described effect of moving the probe to the widthwise central portion of the plate spring portion 20b can be easily obtained.
In modification 1, when the coaxial connector is viewed along the center axis C, the 1 st leg portions 20d1, 20d1 and the 2 nd leg portions 20d2, 20d2 are arranged substantially symmetrically with respect to the line LS. Thus, in the vertical cross section of the plate spring portion 20b, the portion near the contact position of the probe in the auxiliary contact region R is not extremely inclined. This stabilizes the contact state between the probe and the plate spring portion 20b.
(modification 2)
Fig. 9A is a perspective view of a movable terminal 20B provided in the coaxial connector according to modification 2. Fig. 9B is a plan view of the movable terminal 20B. The movable terminal 20B can be used as a substitute for the movable terminal 20 in the coaxial connector 10 according to the above-described embodiment.
Like the movable terminal 20A of modification 1 (see fig. 8A and 8B), the movable terminal 20B of modification 2 includes the 1 st leg portion 20d1, 20d1 and the 2 nd leg portion 20d2, 20d 2. When the coaxial connector is viewed along the center axis C of the hole 34a (see fig. 4) of the main body 12, that is, when the coaxial connector is viewed in the up-down direction, the direction in which each of the 1 st leg portions 20d1, 20d1 extends is a direction (left-right direction) substantially perpendicular to the direction in which the plate spring portion 20b extends (front-rear direction). When the coaxial connector is viewed in the vertical direction, the direction in which the 2 nd leg portions 20d2 and 20d2 extend is also a direction (left-right direction) substantially perpendicular to the direction in which the plate spring portion 20b extends (front-rear direction). In this respect, the movable terminal 20B of modification 2 is different from the movable terminal 20A of modification 1 (see fig. 8A and 8B). Thus, the movable terminal 20B according to modification 2 can be arranged such that the distal ends of the respective leg portions 20d1, 20d1, 20d2, and 20d2 are disposed in a narrower region at the bottom B (see fig. 4) of the internal space S of the main body 12 than the movable terminal 20A according to modification 1.
(modification 3)
Fig. 10 is a perspective view of a movable terminal 20C provided in the coaxial connector according to modification 3. The movable terminal 20C can be used in the coaxial connector 10 according to the above embodiment as a substitute for the movable terminal 20 described above.
The movable terminal 20C of modification 3 includes leg portions 20d3, 20d3, 20d4, 20d 4. In the movable terminal 20C, the legs 20d3, 20d3 are the 1 st leg, and the legs 20d4, 20d4 are the 2 nd leg. When the coaxial connector is viewed along the center axis C of the hole 34a (see fig. 4) of the main body 12, the direction in which the 1 st leg portions 20d3, 20d3 extend and the direction in which the 2 nd leg portions 20d4, 20d4 extend are both directions substantially perpendicular to the left-right direction, that is, the direction in which the plate spring portion 20b extends (front-rear direction). The 1 st legs 20d3, 20d3 and the 2 nd legs 20d4, 20d4 have shapes different from the legs 20d1, 20d1, 20d2, 20d2 described in the above embodiments and modifications.
The 1 st leg portions 20d3, 20d3 extend outward in the left-right direction from the plate spring portion 20b, respectively. More specifically, the 1 st leg portions 20d3, 20d3 are bent at an obtuse angle downward from the plate spring portion 20b, and further bent at an obtuse angle upward. In other words, the 1 st leg portions 20d3 and 20d3 extend outward and downward in the left-right direction from the plate spring portion 20b, and then extend outward and upward in the left-right direction. Therefore, the 1 st leg portions 20d3, 20d3 have downwardly projecting portions, respectively. In the lowermost portion of the portion, the 1 st leg portions 20d3, 20d3 are in contact with the bottom B (refer to fig. 4) of the internal space S of the main body 12, respectively.
The 2 nd leg portions 20d4, 20d4 extend outward in the left-right direction from the plate spring portion 20b, respectively. More specifically, the 2 nd leg portions 20d4, 20d4 are bent downward at an obtuse angle and further upward at an obtuse angle from the plate spring portion 20b, respectively. In other words, the 2 nd leg portions 20d4 and 20d4 extend outward and upward in the left-right direction after extending outward and downward in the left-right direction from the plate spring portion 20b, respectively. Therefore, the 2 nd legs 20d4, 20d4 have downwardly projecting portions, respectively. In the lowermost portion of the portion, the 2 nd leg portions 20d4, 20d4 are in contact with the bottom B (refer to fig. 4) of the internal space S of the main body 12, respectively.
Of the leg portions 20d3, 20d3, 20d4, and 20d4, the portion closer to the distal end side than the lowermost portion is used, for example, for fixation to the bottom B of the internal space S by resin.
Other modifications
The legs may also flex or bend in ways other than those described above. Fig. 11 is a cross-sectional view of the movable terminal 20D, and is a sectional view of a portion including the plate spring portion 20b and the leg portions 20D5, 20D 5. As shown in fig. 11, the leg portions 20d5, 20d5 protruding from both side portions of the plate spring portion 20b may be bent downward from the plate spring portion 20b and outward from each other, respectively. That is, the leg portions 20d5 and 20d5 may extend downward from the side portions of the plate spring portion 20b, then be bent outward in the left-right direction, and then extend upward. In the cross section of the movable terminal 20D shown in fig. 11, the leg portions 20D5, 20D5 each have a substantially J-shape. In more detail, in the cross section of the movable terminal 20D shown in fig. 11, the upper half portions of the respective leg portions 20D5, 20D5 extend in the up-down direction, and the lower half portions of the respective leg portions 20D5, 20D5 have a semicircular shape that opens upward. At the lowermost portion of the semicircular portion, the leg portions 20d5, 20d5 are in contact with the bottom B (see fig. 4) of the internal space S, respectively.
Fig. 12 is a cross-sectional view of the movable terminal 20E, and is a sectional view of a portion including the plate spring portion 20b and the leg portions 20d6, 20d 6. Fig. 12 shows a cross section of the plate spring portion 20b and the leg portions 20d6, 20d6 parallel to the thickness direction. As shown in fig. 12, the leg portions 20d6 and 20d6 may extend outward in the left-right direction from the plate spring portion 20b, and then may be bent downward at an acute angle and outward at an acute angle. That is, the leg portions 20d6 and 20d6 protrude from the side portions of the plate spring portion 20b, extend inward and downward in the left-right direction, and then extend outward in the left-right direction. In this modification, in the cross section including the entire leg portions 20d6, 20d6, the leg portions 20d6, 20d6 each have a substantially zigzag shape.
In more detail, the legs 20d6, 20d6 have 1 st, 2 nd and 3 rd sections 61, 62 and 63, respectively. The 1 st segment 61 extends from the plate spring portion 20b to the left and right outside in the same plane as the plate spring portion 20b. The 2 nd part 62 extends downward and inward in the left-right direction from a distal end portion (an end portion on the opposite side of the plate spring portion 20b) of the 1 st part 61. The angle theta 1 formed by the 1 st portion 61 and the 2 nd portion 62 is an acute angle (0 < theta 1 < 90 deg.). The 3 rd portion 63 extends from a distal end portion (end portion on the opposite side to the 1 st portion) of the 2 nd portion 62 to the left and right outside. The angle theta 2 formed by the 2 nd portion 62 and the 3 rd portion 63 is an acute angle (0 deg. < theta 2 < 90 deg.). In the example shown in fig. 12, the 1 st section 61 is almost parallel to the 3 rd section 63.
According to the structure of the coaxial connector, the shape of the leg portion can be appropriately adopted in consideration of the space in which the leg portion can be disposed and in consideration of the elastic force to be given to the leg portion of the plate spring portion.
In the above-described embodiment and modifications, the movable terminal has the leg portions connected to the side edges of the plate spring portion. However, each leg portion may be provided to the movable terminal so as to protrude from a side portion of the plate spring portion, in other words, a side edge of the plate spring portion or a vicinity thereof, and does not necessarily need to be connected to the side edge of the plate spring portion. For example, as shown in fig. 13, in the movable terminal 20G, the leg portions 20d7 and 20d7 may be connected to the upper surface of the plate spring portion 20b in the vicinity of both side edges of the plate spring portion 20b. In the example shown in fig. 13, the legs 20d7, 20d7 are bent inward toward each other. That is, like the leg portions described in the above embodiment and the 1 st and 2 nd modifications, portions including the distal ends of the leg portions 20d7, 20d7 approach each other as they approach the distal ends.
For example, as shown in fig. 14, in the movable terminal 20H, the leg portions 20d8 and 20d8 may be connected to the lower surface of the plate spring portion 20b in the vicinity of both side edges of the plate spring portion 20b. In the example shown in fig. 14, the legs 20d8, 20d8 are bent inward toward each other. That is, like the leg portions described in the above embodiment and the 1 st and 2 nd modifications, portions including the distal ends of the leg portions 20d8, 20d8 approach each other as they approach the distal ends.
In the above-described embodiment and the modifications, when the movable terminal is viewed in the vertical direction, the portions of the plate spring portion from which the leg portions protrude are arranged at positions symmetrical to each other with respect to the center line in the width direction of the plate spring portion. However, when viewed in the vertical direction, the portions of the plate spring portion from which the leg portions project may be disposed at positions that are asymmetrical with respect to the center line of the plate spring portion in the width direction. For example, as in the movable terminal 20I shown in fig. 15, the portion of one side portion of the plate spring portion 20b from which the leg portion 20d9 protrudes may be arranged at a position shifted from the portion of the other side portion of the plate spring portion 20b from which the leg portion 20d9 protrudes in the direction in which the plate spring portion 20b extends (front-rear direction). In the example shown in fig. 15, the leg portion 20d9 protruding from the right side portion of the plate spring portion 20b is arranged rearward of the leg portion 20d9 protruding from the left side portion of the plate spring portion 20b.
In the above-described embodiment and modifications, in the plate spring portion of the movable terminal, the number of leg portions provided on one side portion is equal to the number of leg portions provided on the other side portion. However, as in the movable terminal 20J shown in fig. 16, the number of the leg portions 20d0 provided on one side portion of the plate spring portion 20b may be different from the number of the leg portions 20d0 and 20d0 provided on the other side portion. In the example shown in fig. 16, two leg portions 20d0, 20d0 protrude from the right side portion of the plate spring portion 20b, and one leg portion 20d0 protrudes from the left side portion of the plate spring portion 20b. In the direction in which the plate spring portion 20b extends (front-rear direction), the positions of the leg portions 20d0, 20d0 provided on the right side of the plate spring portion 20b are shifted from the position of the leg portion 20d0 provided on the left side of the plate spring portion 20b. More specifically, the left leg 20d0 is disposed midway between the right legs 20d0 and 20d0 in the front-rear direction.
The coaxial connector of the present embodiment is explained above. However, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified and implemented as appropriate within a scope not departing from the gist thereof.
Industrial applicability of the utility model
As described above, the present invention is effective in a coaxial connector, and particularly, can accurately measure the electrical characteristics of a circuit connected to the coaxial connector.

Claims (17)

1. A coaxial connector is characterized by comprising:
a body having an inner space, and a hole communicating with the inner space is formed at an upper portion of the body;
a fixed terminal housed in the main body, the fixed terminal including a base fixed to the main body and a contact portion protruding from the base into the internal space; and
a movable terminal housed in the body,
the movable terminal includes: a base fixed to the body; a plate spring portion protruding from the base portion of the movable terminal into the internal space and extending toward the contact portion of the fixed terminal, the plate spring portion having an auxiliary contact area intersecting a central axis of the hole; a contact portion connected to a tip of the plate spring portion and contacting the contact portion of the fixed terminal from below; and leg portions provided on both side portions of the plate spring portion, extending while being bent, protruding in a direction different from the direction in which the plate spring portion extends, and contacting a bottom portion of the internal space.
2. A coaxial connector is characterized by comprising:
a body having an inner space, and a hole communicating with the inner space is formed at an upper portion of the body;
a fixed terminal housed in the main body, the fixed terminal including a base fixed to the main body and a contact portion protruding from the base into the internal space; and
a movable terminal housed in the body,
the movable terminal includes: a base fixed to the body; a plate spring portion protruding from the base portion of the movable terminal into the internal space and extending toward the contact portion of the fixed terminal, the plate spring portion having an auxiliary contact area intersecting a central axis of the hole; a contact portion connected to a tip of the plate spring portion and contacting the contact portion of the fixed terminal from below; and leg portions respectively protruding from both side portions of the plate spring portion and contacting a bottom portion of the internal space,
when the auxiliary contact area of the plate spring portion is pressed from above by a probe, a pressing portion of the upper surface of the plate spring portion pressed by the probe is located below a portion of the upper surface of the plate spring portion, the portion protruding from the leg portion.
3. The coaxial connector of claim 1 or 2,
the auxiliary contact areas in the plate spring portion are located between the portions of the leg portions that protrude from each other.
4. The coaxial connector of claim 1 or 2,
a plurality of leg portions are provided on both side portions of the plate spring portion,
the leg portion includes:
1 st leg portions protruding from both side portions of the plate spring portion and contacting a bottom portion of the internal space, respectively; and
a 2 nd leg portion which is a 2 nd leg portion that protrudes from both side portions of the plate spring portion and contacts a bottom portion of the internal space, respectively, and is provided adjacent to the 1 st leg portion in a direction in which the plate spring portion extends,
in the plate spring portion, the auxiliary contact area is located in a range including an area between the 1 st leg protruding portions and an area between the 2 nd leg protruding portions.
5. The coaxial connector of claim 1 or 2,
when the coaxial connector is viewed along the center axis, the direction in which the leg portions each extend is a direction perpendicular to the direction in which the plate spring portion extends.
6. The coaxial connector of claim 4,
when the coaxial connector is viewed along the center axis, the direction in which the 1 st leg portions each extend and the direction in which the 2 nd leg portions each extend are directions inclined with respect to the direction in which the plate spring portion extends.
7. The coaxial connector of claim 6,
when the coaxial connector is viewed along the central axis, the 1 st leg portion is arranged symmetrically with respect to the 2 nd leg portion with respect to a line passing through the auxiliary contact area and perpendicular to a direction in which the plate spring portion extends.
8. The coaxial connector of claim 6,
when the coaxial connector is viewed along the central axis, the intersection point of the centerlines of the 1 st leg and the 2 nd leg coincides.
9. The coaxial connector of claim 1 or 2,
the leg portions protruding from both side portions of the plate spring portion are bent inward from each other, respectively.
10. The coaxial connector of claim 1 or 2,
the leg portions protruding from both side portions of the plate spring portion are bent downward respectively, and further bent outward from each other.
11. The coaxial connector of claim 1 or 2,
the leg portions protruding from both side portions of the plate spring portion are bent downward at an acute angle, respectively, and further bent outward at an acute angle to each other.
12. The coaxial connector of claim 1 or 2,
the leg portions protruding from both side portions of the plate spring portion are bent downward at an obtuse angle and further bent upward at an obtuse angle, respectively.
13. The coaxial connector of claim 1 or 2,
the leg portions are connected to side edges of the plate spring portions, respectively.
14. The coaxial connector of claim 1 or 2,
the leg portions are connected to the upper surfaces of the plate spring portions, respectively.
15. The coaxial connector of claim 1 or 2,
the leg portions are connected to the lower surfaces of the plate spring portions, respectively.
16. The coaxial connector of claim 1 or 2,
the portion of one side of the plate spring portion from which the leg portion protrudes is disposed at a position corresponding to the portion of the other side of the plate spring portion from which the leg portion protrudes in the direction in which the plate spring portion extends.
17. The coaxial connector of claim 1 or 2,
the portion of one side of the plate spring portion from which the leg portion protrudes is arranged at a position shifted from the portion of the other side of the plate spring portion from which the leg portion protrudes in the direction in which the plate spring portion extends.
CN202120964212.7U 2020-05-14 2021-05-07 Coaxial connector Active CN215896766U (en)

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JP2020085325 2020-05-14

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Publication number Priority date Publication date Assignee Title
JP3096377U (en) 2003-03-11 2003-09-12 インサート エンタープライズ カンパニ リミテッド Ultra-small micro switch connector
JP2005158359A (en) 2003-11-21 2005-06-16 Matsushita Electric Works Ltd Contact member and coaxial connector equipped with the same
TWM336614U (en) 2008-02-14 2008-07-11 Chant Sincere Co Ltd Coaxial connector
JP3177068U (en) 2012-05-07 2012-07-19 隆志工業股▲ふん▼有限公司 Small coaxial connector
KR101685604B1 (en) 2015-02-16 2016-12-12 몰렉스 엘엘씨 Coaxial connector and method for assembling the same
CN210489870U (en) 2019-01-15 2020-05-08 电连技术股份有限公司 Miniature radio frequency switch

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