JP2014049273A - Push-on coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push-on coaxial connector capable of maintaining electrically stable contact.SOLUTION: A connector 40 has a structure in which an outer cylinder 14, an external contact 16, an insulator 18 and a central contact 20 are coaxially arranged sequentially from outside, and integrated with each other. A hollow part 28 in which a jack 12 is inserted is constituted inside the external contact 16. A tip side portion of the external contact 16 constitutes a contact spring 16c. The outer cylinder 14 has a covering part 14b covering a tip face 16f of the contact spring 16c at its tip. The covering part 14b has an opening 14c with an opening diameter a smaller than a general inside diameter b of the outer cylinder 14 at a center part of a front face. The opening 14c constitutes an introduction port for introducing the jack 12 to the hollow part 28.

Description

  The present invention relates to a push-on type coaxial connector, which can maintain an electrically stable contact.

  The push-on coaxial connector is a type of coaxial connector in which male and female connectors are coupled to each other by a push-in operation, and pulled out from each other by a pull-out operation. A conventional push-on coaxial connector used for high-frequency transmission is shown in FIGS. This is a high-frequency coaxial C05 type connector conforming to the current JIS standard C5415. 2 shows a plug connector (hereinafter referred to as “plug”) 10 constituting one part of the coaxial connector, and FIG. 3 shows a jack connector (receptacle) (hereinafter referred to as “jack”) 12 constituting the other part of the coaxial connector. . The plug 10 and the jack 12 are detachably coupled to each other by a push-in operation and a pull-out operation in the axial direction by manual operation. FIG. 4 shows the combined state.

  In FIG. 2, the plug 10 has an outer cylinder (cover) 14, an external contact (external conductor, shell) 16, an insulator (dielectric) 18, and a center contact (internal conductor) 20 arranged coaxially in order from the outside. Are integrated. The outer cylinder 14 is not defined in the current JIS standard C5415, but can be optionally provided while conforming to the standard. The external contact 16 has an annular base end portion 16a and a plurality of contacts extending continuously toward the tip end side toward the base end portion 16a and arranged circumferentially in the circumferential direction through slits 17 mutually. It has a spring 16c. The front end surface 16 f of the contact spring 16 c constitutes the front end surface of the plug 10 together with the front end surface 14 e of the outer cylinder 14 and is exposed to the front surface of the plug 10. An opening 16k formed on the inner peripheral side of the front end surface 16f of the contact spring 16c constitutes an introduction port (insertion port) for introducing (inserting) the jack 12 into the hollow portion 28. In order to facilitate the introduction of the jack 12, the inlet 16k is widened with an inclined surface 16h, and is connected to the flat surface 16j on the back side of the inclined surface 16h.

  An outer conductor of a coaxial cable (not shown) is connected to the outer side of the small-diameter portion 16d that extends to the opposite side of the contact spring 16c continuously to the base end portion 16a of the external contact 16. A spring ring 24 is fitted on the outer periphery of the contact spring 16c. On the inner peripheral surface near the tip of each contact spring 16c, a protrusion 16e is formed that constitutes the plug 10 side portion of the locking mechanism of the plug 10 and the jack 12. At the radial position between the contact spring 16c and the outer cylinder 14, a clearance 26 is formed on the entire circumference to allow the contact spring 16c to bend outward when the jack 12 (FIG. 3) is attached or detached. Yes. At a radial position between the contact spring 16 c and the insulator 18, a hollow portion 28 into which both ends of the external contact (external conductor, shell) 30 of the jack 12 and the insulator 32 are detachably inserted is formed. . A central hole 20a is formed on the central axis of the distal end portion of the central contact 20 so that the distal end portion 34a of the central contact (internal conductor) 34 of the jack 12 is detachably inserted.

  In FIG. 3, the jack 12 is configured by integrally arranging an external contact 30, an insulator 32, and a center contact 34 in order from the outside. Between the both ends of the insulator 32 and the center contact 34, a hollow portion 36 is formed into which both ends of the insulator 18 of the plug 10 and the center contact 20 are detachably inserted. The tip end 34 a of the center contact 34 is detachably inserted into the center hole 20 a of the center contact 20 of the plug 10. On the outer peripheral surface of the external contact 30, an annular groove 30 a constituting a portion on the jack 12 side of the locking mechanism between the plug 10 and the jack 12 extends in the entire circumferential direction. The position of the groove part 30a is set so that the protrusion part 16e of the plug 10 and the groove part 30a of the jack 12 are fitted and locked at a position where the plug 10 and the jack 12 are pushed and joined to each other.

  The plug 10 and the jack 12 having the above-described configuration can be obtained by, for example, installing the jack 12 in a device, attaching the plug 10 to the tip of a coaxial cable (not shown), and manually pushing the plug 10 into the jack 12. As shown in FIG. 4, they are detachably coupled to each other and removed by being pulled out. That is, when the outer cylinder 14 of the plug 10 is grasped with a finger and pushed into the jack 12, the plug 10 and the jack 12 are coupled to each other by fitting the concave and convex structures on both end surfaces, and further by fitting the groove 30a and the protrusion 16e. The coupling state is maintained by a lock mechanism. When in this coupled state, the external contacts 16 and 30 and the central contacts 20 and 34 are electrically connected to each other. The conduction between the external contacts 16 and 30 is obtained when the contact spring 16c of the external contact 16 presses and contacts the outer peripheral surface of the external contact 30 by the spring force. When the outer tube 14 of the plug 10 is grasped and pulled out from this coupled state with the finger, the fitting of the groove 30a and the protrusion 16e is released, and the plug 10 and the jack 12 are removed from each other.

JIS C5415 “High Frequency Coaxial C05 Connector”

  According to the conventional plug 10 of FIG. 2, there is no problem if the plug 10 is inserted in a straight posture with respect to the jack 12 (FIG. 3), but if it is inserted in an inadvertently inclined posture, the contact spring 16c The external contact 30 of the jack 12 hits strongly, and the contact spring 16 does not return while being bent outward. As a result, the electrical contact between the contact spring 16c and the external contact 30 becomes unstable and transmission of high frequency or the like is performed. There was a problem. Further, even when the plug 10 is correctly inserted in a straight posture with respect to the jack 12, after that, something is accidentally caught in the coaxial cable drawn from the plug 10 and a strong lateral force is applied to the plug 10. In this case, the external contact 30 of the jack 12 strongly hits the contact spring 16c, and the contact spring 16 does not return while being bent outward. As a result, the electrical contact between the contact spring 16c and the external contact 30 is unstable. As a result, transmission of high-frequency waves may be hindered.

  The present invention has been made in view of the above points. When the plug and jack are inadvertently inserted in an inclined posture, or when something is accidentally caught in the coaxial cable, etc. It is an object of the present invention to provide a push-on coaxial connector that prevents an excessive force spreading in the direction from being applied and maintains an electrically stable contact.

  In the present invention, one part of a pair of push-on coaxial connectors (40, 12) that can be coupled to each other (in this section, reference numerals in parentheses indicate reference numerals used in embodiments of the present invention described later) Constructing connector (40) having a structure in which an outer cylinder (14), an external contact (16), an insulator (18), and a center contact (20) are coaxially arranged in order from the outside. A hollow portion (28) into which the mating connector (12) is inserted inside the external contact (16) on the tip side connected to the mating connector (12), and the external contact (16) A slit (17) that opens to the distal end side is formed in the distal end portion of the contact portion to constitute a contact spring (16c), and the hollow portion (28) is provided between the external contact (16) and the outer cylinder (14). ) To the mating connector In the push-on coaxial connector (40) having a gap (26) that allows the contact spring (16c) of the external contact (16) to bend outward when the 12) is inserted, (14) has a cover portion (14b) covering the tip surface (16f) of the contact spring (16c) of the external contact (16) at the tip portion, and the cover portion (14b) The cylinder (14) has an opening (14c) having an opening diameter (a) smaller than the general inner diameter (b), and the opening (14c) introduces the mating connector (12) into the hollow portion (28). It constitutes the mouth.

  According to the connector (40) of the present invention, even if a lateral force is applied to the connector (40) in a state of being coupled to the mating connector (12), the inlet (14c) of the outer cylinder (14) is not connected to the mating connector (40). Since the middle part of the external contact (30) of the side connector (12) is supported and the mutual inclination of the two connectors (40, 12) is suppressed, an unreasonable force spreading outward is applied to the contact spring (16c). Is prevented. Therefore, the contact spring (16c) is unlikely to sag, and an electrically stable contact can be maintained over a long period of time. The cover portion (14b) is not limited to cover the entire radial direction of the tip end surface (16f) of the contact spring (16c), and may cover a part of the radial direction (for example, the outer peripheral side). .

  In the present invention, the opening diameter (a) of the opening (14c) of the covering part (14b) may be set equal to the general diameter (c) of the hollow part (28). According to this, since the gap between the introduction port (14c) of the outer cylinder (14) and the external contact (30) of the mating connector (12) can be made small, the contact spring (16c) can be An unreasonable force spreading in the direction can be more reliably prevented.

  In this invention, the said opening (14c) of the said cover part (14b) shall be opened by the inclined surface (14g). According to this, it becomes easy to introduce the mating connector (12) into the opening (14c).

  In the present invention, the cover portion (14b) may be configured integrally with the main body portion (14d) of the outer cylinder (14). According to this, the cover portion (14b) can be easily configured, and the number of parts need not be increased.

  In the present invention, the tip surface (16f) of the contact spring (16c) is formed on a surface orthogonal to the central axis (S) of the connector (40), and the diameter (g) of the innermost circumferential position of the tip surface (16f). ) Is set to be larger than the opening diameter (a) of the opening (14c), and the innermost peripheral position of the distal end surface (16f) is an inclined surface (16m) whose diameter decreases toward the back of the connector (40). It can be connected to. According to this, the mating connector (12) introduced from the introduction port (14c) does not collide with the front end surface (16f) of the contact spring (16c), but abuts against the inclined surface (16m) and contacts the contact spring (16c). ) Can be expanded.

  According to the present invention, a protrusion (16e) is fitted to a groove (30a) formed on the outer peripheral surface of the mating connector (12) on the inner peripheral surface of the external contact (16) near the tip of the contact spring (16c). And the inner diameter (e) of the external contact (16) at the position of the protrusion (16e) is set smaller than the opening diameter (a) of the opening (14c) of the cover (14b). It can be. According to this, the groove (30a) and the protrusion (16e) are fitted while supporting the intermediate portion of the external contact (30) of the mating connector (12) by the introduction port (14c) of the outer cylinder (14). Can do.

  In the present invention, the top surface (16g) of the protrusion (16e) and the tip surface (16f) of the contact spring (16c) may be connected by a continuous inclined surface (16m). According to this, the flat surface (16i) of the introduction port (16k) of the conventional structure of FIG. 2 is eliminated, the contact spring (16c) is shortened, and the depth (f) of the hollow portion (28) is equal to that of the conventional structure. Thus, it can be used in place of a connector having a conventional structure.

  The connector of the present invention can be configured as, for example, a high-frequency coaxial C05 type connector conforming to JIS standard C5415. According to this, it can couple | bond with the other party connector which conforms to JIS specification C5415.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of the plug of the coaxial connector by this invention, (a) is the side view which showed the upper half by the cross section, (b) is the front view seen from the inlet side which introduces a jack. It is a figure which shows the plug of the conventional coaxial connector, (a) is the side view which showed the upper half by the cross section, (b) is the front view seen from the inlet side which introduces a jack. FIG. 3 is a side view showing a jack of a conventional coaxial connector commonly coupled to the plug according to the present invention of FIG. 1 and the conventional plug of FIG. 2, with the upper half shown in section. FIG. 4 is a side view showing the upper half in section, showing a state in which the jack of FIG. 3 is inserted and coupled to the conventional plug of FIG. 2. FIG. 4 is a side view showing the upper half in section, showing a state in which the jack of FIG. 3 is inserted and coupled to the plug according to the present invention of FIG. 1.

  An embodiment of a coaxial connector of the present invention is shown in FIG. This is a plug constituting one connector of a pair of high-frequency coaxial C05 type connectors conforming to the current JIS standard C5415, and can be coupled to a conventional jack constituting the other connector shown in FIG. In FIG. 1, the same reference numerals are used for parts common to the conventional structure of FIG.

  In FIG. 1, the plug 40 is configured such that the outer cylinder 14, the external contact 16, the insulator 18, and the center contact 20 are coaxially arranged in order from the outside, and the whole is integrated. The outer cylinder 14 is not defined in the current JIS standard C5415, but can be provided while conforming to the standard. The external contact 16 has an annular base end portion 16a, and extends toward the distal end side continuously to the base end portion 16a and is arranged in the circumferential direction of the base end portion 16a through the slits 17 around the entire circumference. And a plurality of contact springs 16c. An outer conductor of a coaxial cable (not shown) is connected to the outer side of the small-diameter portion 16d extending to the opposite side of the contact spring 16c continuously to the base end portion 16a. A spring ring 24 is fitted on the outer periphery of the contact spring 16c. The spring ring 24 is configured such that one portion in the circumferential direction is cut (a slit is formed) and can be expanded, and the contact spring 16c is tightened from the outer peripheral side to assist the restoring force of the contact spring 16c. do. On the inner peripheral surface near the tip (free end) of each contact spring 16c, a protrusion 16e is formed that constitutes the plug 40 side portion of the locking mechanism between the plug 40 and the jack 12. The height of the protrusion 16e (the height of the inner peripheral surface of the contact spring 16c relative to the general surface) is, for example, about 0.15 mm. At the radial position between the contact spring 16c and the outer cylinder 14, a gap 26 that allows the contact spring 16c to bend outward when the jack 12 (FIG. 3) is attached or detached extends all around the circumferential direction. Is formed. The size (gap length) of the gap 26 is, for example, about 0.2 mm. At a radial position between the contact spring 16 c and the insulator 18, a hollow portion 28 is formed in which both ends of the external contact 30 of the jack 12 and the insulator 32 are detachably inserted. A central hole 20a is formed on the central axis of the distal end portion of the central contact 20 so that the distal end portion 34a of the central contact 34 of the jack 12 is detachably inserted. For example, the material of each component can be brass (gold-plated coating) for the outer cylinder 14 and the external contact 16, beryllium copper (gold-plated coating) for the center contact 20 and the spring ring 24, and a fluororesin for the insulator 18.

  The outer cylinder 14 is formed in a cylindrical shape, and the external contact 16 is inserted from the rear end opening portion, the rear end portion 14 a is fitted into the outer periphery of the base end portion 16 a of the external contact 16, and is caulked and fixedly attached to the external contact 16. A plate-like cover portion 14b that is folded inward at a right angle with respect to the central axis S of the plug 40 and covers the tip end surface 16f of the contact spring 16c is integrated with the main body portion 14d of the outer tube 14 at the distal end portion of the outer tube 14. (Ie as a single part). The thickness of the cover portion 14b is a thickness that is sufficiently rigid so that it does not bend even when the jack 12 abuts, and can be set to be approximately the same as the general thickness of the main body portion 14d of the outer cylinder 14, for example. In the embodiment of FIG. 1, the thickness of the cover portion 14 b is set to be slightly thinner than the general thickness of the main body portion 14 d of the outer cylinder 14.

  As shown in FIG. 1B, a circular opening 14c is formed in the front center portion of the cover portion 14b, whereby the front shape of the cover portion 14b is formed in a ring shape. The opening 14 c constitutes an introduction port for introducing the jack 12 into the hollow portion 28. The external contact 16 has a structure in which the tip end portion of the contact spring 16c is cut and the axial length is shortened as compared with the conventional structure of FIG. A front end surface 16 f of the contact spring 16 c of the external contact 16 is disposed behind the cover portion 14 b of the outer cylinder 14. The opening diameter a of the introduction port 14c of the cover part 14b is smaller than the general inner diameter b of the outer cylinder 14, and is equal to the general diameter b of the hollow part 28 (that is, larger than the general diameter d of the external contact 30 of the jack 12 (FIG. 3)). Slightly larger) is set. In order to facilitate the introduction of the jack 12, the inlet 16c is widened with an inclined surface 14g, and is connected to the flat surface 14h on the back side of the inclined surface 14g. The opening diameter a of the inlet 14c is the inner diameter at the position of the flat surface 14h.

  The inner diameter e of the external contact 16 at the position of the protrusion 16e is set smaller than the opening diameter a of the introduction port 14c. Therefore, when the plug 40 is viewed from the front side (the side of the introduction port 14c for introducing the jack 12), only the protrusion 16e of the contact spring 16c appears to be exposed to the introduction port 14c, and the front end surface 16f cannot be seen (FIG. 2B). )). The depth f of the hollow portion 28 (the distance from the front surface 14f of the cover portion 14b to the bottom of the hollow portion 28) is the depth f of the hollow portion 28 of the conventional structure shown in FIG. 2 (the tips of the external contact 16 and the contact spring 16c). The distance from the surfaces 14e, 16f to the bottom of the hollow portion 28). The position of the protrusion 16e of the contact spring 16c with respect to the front surface 14f of the cover part 14b is equal to the position of the protrusion 16e of the contact spring 16c with respect to the front end surfaces 14e and 16f of the external contact 16 and the contact spring 16c of the conventional structure of FIG. . In the conventional structure of FIG. 2, the opening 16k formed on the inner peripheral side of the distal end surface 16f of the contact spring 16c constitutes an introduction port for introducing the jack 12 into the hollow portion 28. However, in the structure of FIG. The opening 14c of the cover portion 14b constitutes an inlet for introducing the jack 12 into the hollow portion 28. In the structure of FIG. 1, compared to the structure of FIG. 2, the tip portion of the contact spring 16 c is cut as much as the cover portion 14 b is added to the tip portion of the outer cylinder 14, and the depth f of the hollow portion 28 is as shown in FIG. 2. The structure is not changed. The front end portion of the contact spring 16c in FIG. 1 cuts the front end portion of the contact spring 16c in FIG. 2, and the top surface 16g of the protrusion 16e (a surface parallel to the central axis S of the connector 40) and the front end surface 16f (connector). 40 planes orthogonal to the central axis S) are connected by a continuous inclined surface 16m. Therefore, the tip of the contact spring 16c in FIG. 1 does not have a portion corresponding to the flat surface 16i of the introduction port 16k in FIG. The diameter g of the innermost circumferential position of the tip surface 16f of the contact spring 16c is larger than the opening diameter a of the introduction port 14c (inner diameter at the position of the flat surface 14h). Therefore, the jack 12 introduced from the introduction port 14c does not collide with the front end surface 16f of the contact spring 16c, but can contact the inclined surface 16m and push the contact spring 16c apart.

  1 and the jack 12 of FIG. 3 are installed in equipment (directional coupler, distributor, combiner, coaxial terminator, coaxial attenuator, impedance matching device, etc.), for example. A plug 40 is attached to the tip of a coaxial cable (not shown), and when the plug 40 is manually pushed into the jack 12, they are detachably coupled to each other as shown in FIG. . That is, when the outer cylinder 14 of the plug 40 is grasped with a finger and the jack 12 is inserted into the introduction port 14c, the tip end portion of the jack 12 presses against the protrusion 16e of each contact spring 16c, and each contact spring 16c is evenly spread. As a result, the plug 40 and the jack 12 are coupled to each other by fitting the concavo-convex structure on both end surfaces. When the plug 10 is further pushed in, the coupling state is maintained by a lock mechanism formed by fitting the groove 30a and the protrusion 16e, both extending along the entire circumference in the circumferential direction. When in this coupled state, the external contacts 16 and 30 and the central contacts 20 and 34 are electrically connected to each other. The conduction between the external contacts 16 and 30 is obtained when the contact spring 16c of the external contact 16 presses and contacts the outer peripheral surface of the external contact 30 by the spring force. When the outer tube 14 of the plug 40 is grasped and pulled out from this coupled state with the finger, the fitting of the groove 30a and the protrusion 16e is released, and the plug 40 and the jack 12 are removed from each other. When the jack 12 is pushed in, the jack 12 is guided by the introduction port 14c at the distal end portion of the outer cylinder 14 and inserted into the hollow portion 28. Therefore, the jack 12 is inserted in a state where the shaft of the jack 12 is not greatly inclined. Thus, an unreasonable force spreading outward is prevented from being applied to the contact spring 16c. Even after the connection, even if a lateral force is applied to the plug 40, the inner peripheral surface of the introduction port 14c abuts on the outer peripheral surface of the external contact 30 of the jack 12, so that the external contact 30 of the jack 12 is a hollow portion. 28, since it is supported at two points, the position near the front end and the position of the introduction port 14c, the inclination (lateral vibration) is suppressed, and it is possible to prevent the contact spring 16c from being applied with an excessive force spreading outward. . Therefore, it is difficult for the contact spring 16c to sag, and an electrically stable contact can be maintained over a long period of time.

  In the above embodiment, the cover portion 14b is configured integrally with the main body portion 14d of the outer cylinder 14 (that is, as one component). However, the outer cylinder 14 and the cover portion 14b are configured as separate components, and the distal end of the outer cylinder 14 is formed. It is also possible to cut a female screw on the inner peripheral surface of the opening, cut a male screw on the outer peripheral surface of the cover portion 14b, and screw the cover portion 14b into the tip opening portion of the outer cylinder 14 for mounting. Moreover, although the case where this invention was applied to the coaxial connector provided with the locking mechanism by fitting with the protrusion 16e and the groove part 30a was shown in the said embodiment, this invention is applied also to the coaxial connector which does not have the same locking mechanism. can do. In the above-described embodiment, the tip surface 16f of the contact spring 16c is configured as a flat surface orthogonal to the central axis S of the plug 40. Moreover, although the case where this invention was applied to the plug connector (connector attached to free ends, such as a cable) was shown in the said embodiment, a plug connector and a jack connector (receptacle connector) (connector used by attaching to a panel, a chassis, etc.) The present invention can also be applied to a jack connector.

  DESCRIPTION OF SYMBOLS 12 ... Counterpart connector (jack connector, receptacle), 14 ... Outer cylinder, 14b ... Cover part, 14c ... Cover part opening (introduction port), 14d ... Main part of outer cylinder, 14g ... Inclined surface of introduction port, 16 ... external contact, 16c ... contact spring, 16e ... protrusion, 16f ... tip surface of contact spring, 16g ... top surface of protrusion, 16m ... inclined surface of contact spring tip, continuous inclined surface, 17 ... slit, DESCRIPTION OF SYMBOLS 18 ... Insulator, 20 ... Center contact, 26 ... Gap, 28 ... Hollow part, 30a ... Groove part, 40 ... Connector (plug connector), a ... Opening diameter of introduction port, b ... General inner diameter of outer cylinder, c ... Hollow General diameter of the part, e ... Inner diameter of the external contact at the position of the protrusion, g ... Diameter of the innermost peripheral position of the tip surface of the contact spring, S ... Center axis of the connector

Claims (7)

A connector (40) constituting one part of a pair of push-on coaxial connectors (40, 12) that can be coupled to each other, in order from the outside, an outer cylinder (14), an external contact (16), and an insulator (18) ), Having a structure in which the central contact (20) is coaxially arranged and integrated, and on the tip side connected to the mating connector (12), on the inside of the external contact (16), the mating connector (12) has a hollow portion (28) into which a distal end portion of the external contact (16) is formed with a slit (17) that opens to the distal end side to form a contact spring (16c), When the mating connector (12) is inserted into the hollow portion (28) between the contact (16) and the outer cylinder (14), the contact spring (16c) of the external contact (16) is Flex outward In push-on coaxial connector having a gap (26) to allow the (40),
The outer cylinder (14) has a cover part (14b) covering the tip surface (16f) of the contact spring (16c) of the external contact (16) at the tip part.
The cover part (14b) has an opening (14c) having an opening diameter (a) smaller than the general inner diameter (b) of the outer cylinder (14) at the front center part,
The opening (14c) constitutes an inlet for introducing the mating connector (12) into the hollow portion (28). Push-on coaxial connector (40).   The push-on coaxial connector (40) according to claim 1, wherein an opening diameter (a) of the opening (14c) of the covering portion (14b) is set equal to a general diameter (c) of the hollow portion (28). .   The push-on coaxial connector (40) according to claim 1 or 2, wherein an opening of the opening (14c) of the cover (14b) is widened by an inclined surface (14g).   The tip surface (16f) of the contact spring (16c) is formed on a surface orthogonal to the central axis (S) of the connector (40), and the diameter (g) of the innermost peripheral position of the tip surface (16f) is It is set larger than the opening diameter (a) of the opening (14c), and the innermost peripheral position of the tip surface (16f) is connected to an inclined surface (16m) whose diameter decreases toward the back of the connector (40). Push-on coaxial connector (40) according to any one of the preceding claims.   A protrusion (16e) that fits into a groove (30a) formed on the outer peripheral surface of the mating connector (12) is formed on the inner peripheral surface of the external contact (16) near the tip of the contact spring (16c). The inner diameter (e) of the external contact (16) at the position of the protrusion (16e) is set smaller than the opening diameter (a) of the opening (14c) of the cover (14b). The push-on coaxial connector (40) according to any one of claims 4 to 4.   The push-on coaxial connector (40) according to claim 5, wherein the top surface (16g) of the protrusion (16e) and the tip surface (16f) of the contact spring (16c) are connected by a continuous inclined surface (16m). ).   The push-on coaxial connector (40) according to any one of claims 1 to 6, wherein the push-on coaxial connector (40) is a high-frequency coaxial C05 type connector conforming to JIS standard C5415.

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