JP6681655B2 - Coaxial connector - Google Patents

Description

  The present invention relates to a coaxial connector used for a cord connecting device for earphones / headphones, an electric device, an electronic device, and the like, and particularly to a structure that has a simple structure, is inexpensive, and enables stable contact.

A coaxial connector, which is connected to an object to be connected and is attached to and detached from a mating connector, has an inner conductor having a contact portion that comes into contact with a terminal of the mating connector and a connecting portion that connects to the object to be connected, and the inner conductor holds the inner conductor. An array of insulators, an outer conductor that covers the insulators and connects to the connection target, and an engaging member that engages with the mating connector.
Below, Patent Document 1 (Japanese Utility Model Publication No. 5-23452) is cited as a document already proposed by the applicant.
Actual Kaihei No. 5-23452. According to the summary of this document, we provide a connector that enables electrical connection between adjacent printed boards and mechanical connection between boards at the same time (no need for conventional screw connection), saving space and simplifying work. For the purpose of achieving the above, a slit 68 (which communicates with an internal fitting hole 64) is provided on both sides of a cylindrical main body 62, and a female contact 60 having a loop-shaped spring 72 attached thereto; There is disclosed an electrical connector having a structure in which a connector is configured by the male contact 50 having the groove 54; and when these are fitted, the spring 72 falls into the receiving groove 54 and is locked.

The outer conductor is often made of inexpensive brass, and the contact with the mating connector is made by abutting the tip portion. However, in this contact structure, the contact may be momentarily interrupted when it is vibrated or twisted, resulting in a defective connection.
In consideration of connection stability, a slit (notch) is provided in the tip portion of the outer conductor to give elasticity, and a protrusion protruding in the outer peripheral (outer) direction is provided, and the protrusion and the tip portion are provided at two locations. The structure is such that it can contact the mating connector. However, in order to provide elasticity by providing the slits, there is no choice but to use costly beryllium copper instead of brass, and there is a problem that the breaking strength is deteriorated by providing the slits.
The structure of Patent Document 1 requires a clearance required for moving and incorporating a loop-shaped spring, and is a structure that is weak against vibration and twisting.

  The present invention has been made in view of such conventional problems, and provides a coaxial connector having a simple structure, inexpensive, capable of stable contact (connection), and avoiding deterioration of strength. .

The present invention has been made to achieve the above object, and is a coaxial connector that is connected to an object to be connected and that is attached to and detached from a mating connector, and a contact portion that comes into contact with a terminal of the mating connector and the connection. An inner conductor having a connecting portion for connecting to an object, an insulator holding and arranging the inner conductor, an outer conductor for covering the insulator and connecting to the connection object, and the mating connector. In a coaxial connector including an engaging member, the engaging member is made of a conductive material, and a main body is mounted on an outer peripheral surface of the outer conductor, and the main body protrudes toward a mating direction of the mating connector. Contacting means for contacting each other is provided on at least one of the outer conductor and the protruding piece of the engaging member, and an inner surface of the protruding piece and an outer peripheral surface of the outer conductor are provided. contact Allowed, and, a coaxial connector which comprises contacting an outer surface of at least the body portion of the engaging member to the inner surface of the mating connector.

The outer conductor is a coaxial connector provided with a protruding portion protruding in the outer peripheral (outer) direction at the tip end in the fitting direction with the mating connector.
Further, as the contact means, the outer conductor is bent at the rear side (opposite to the fitting direction) of the protruding portion so that the inner surface of the protruding piece of the engaging member and the bent outer peripheral surface of the outer conductor. It is a coaxial connector that contacts the part.
Further, as the contact means, the projecting piece of the engaging member is a coaxial connector that bends in the inner peripheral (inner) direction to bring the inner surface of the projecting piece of the engaging member into contact with the outer peripheral surface of the outer conductor. .

The engaging member is a coaxial connector made of an inexpensive material by press working.
Further, the main body of the engaging member has a substantially C-shaped cross section with a cutout provided in a part thereof, and the main body defines an inner space together with the outer peripheral surface of the outer conductor to have elasticity. A coaxial connector having an inner surface .
Further, in the coaxial connector, the projecting piece of the engaging member is three in order to balance the contact.

The connector of the present invention and the mating connector are stably connected by bringing the projecting piece of the engaging member and the outer conductor into contact with each other and by bringing the main body of the engaging member into contact with the mating connector. be able to. Thus, in consideration of the connection stability, a slit (notch) is provided in the tip portion of the outer conductor in order to give elasticity, and a protrusion protruding in the outer peripheral (outer) direction is provided. It is not necessary to use a structure that can contact the mating connector at two positions, and it is not necessary to use beryllium copper, which can avoid the deterioration of strength due to the slits (cutouts) provided in the outer conductor and which is costly.
As is clear from the above description, according to the coaxial connector of the present invention, it is possible to provide a structure that is simple in structure, inexpensive, capable of stable contact (connection), and capable of avoiding strength deterioration.

(A) It is the perspective view which looked at the coaxial connector of the present invention from the fitting direction of a mating connector. (B) It is the perspective view which looked at the coaxial connector of the present invention from the direction of connection with an object for connection. (C) is a cross-sectional view of the coaxial connector of the present invention taken along the center of the internal conductor. (A) It is the perspective view which looked at the state where the coaxial connector of the present invention and the mating connector were fitted from the fitting direction of the mating connector. (B) It is the perspective view which looked at the state where the coaxial connector of the present invention and the mating connector were fitted from the direction of connection with the connection object. (C) is a cross-sectional view of a state in which the coaxial connector of the present invention and the mating connector are fitted to each other, taken along the center of the internal conductor. (A) It is a perspective view of the inner conductor as seen from the fitting direction. FIG. 6B is a perspective view of the inner conductor as seen from the connection direction. (A) It is the perspective view which looked at an insulator from the fitting direction. (B) It is the perspective view which looked at an insulator from the direction (connection direction) opposite to the fitting direction. (C) It is sectional drawing which crossed the insulator at the mounting center of an internal conductor. (A) It is the perspective view which looked at the external conductor from the fitting direction. (B) It is the perspective view which looked at the external conductor from the direction (connection direction) opposite to the fitting direction. (C) It is sectional drawing which carried out the cross section of the outer conductor in the insulator mounting center. (A) It is the perspective view which looked at an engaging member from the fitting direction. (B) It is the perspective view which looked at the engagement member from the direction (connection direction) opposite to the fitting direction. (C) is a cross-sectional view of the engagement member, taken along the center of the outer conductor.

A feature of the present invention is a coaxial connector 10 that is connected to an object to be connected and is attached to and detached from a mating connector, and has a contact portion 221 that comes into contact with a terminal of the mating connector and a connection portion 223 that connects to the object to be connected. An inner conductor 22 having the above, an insulator 24 for holding and arranging the inner conductor 22, an outer conductor 26 for covering the insulator 24 and connecting to the connection target, and an engaging member 20 for the mating connector. In the coaxial connector 10 including, the engaging member 20 is attached to the outer conductor 26, and the engaging member 20 has at least a protruding piece 202 protruding from the main body 201 toward the mating direction of the mating connector. Two or more sheets are provided, and the outer conductor 26 and the projecting piece 202 of the engaging member 20 are provided with contacting means for contacting each other to bring the projecting piece 202 and the outer conductor 26 into contact with each other. And a coaxial connector, characterized in that contacting the engaging member 20 to the mating connector.
That is, the coaxial connector 10 of the present invention is provided with at least two projecting pieces 202 projecting from the main body portion 201 of the engaging member 20 toward the mating direction of the mating connector, and the outer conductor 26 and the engaging member. The projecting piece 202 of 20 is provided with a contact means for contacting each other so that the projecting piece 202 and the outer conductor 26 are brought into contact with each other and the engaging member 20 is brought into contact with the mating connector.

An embodiment of the coaxial connector 10 of the present invention will be described with reference to FIGS. 1 to 6.
FIG. 1A is a perspective view of the coaxial connector of the present invention as viewed from the mating direction of a mating connector, and FIG. 1B is a perspective view of the coaxial connector of the present invention as viewed from the connection direction with a connection target. , (C) are cross-sectional views of the coaxial connector of the present invention taken along the center of the inner conductor. FIG. 2 (A) is a perspective view of the state in which the coaxial connector of the present invention and the mating connector are fitted together, as seen from the mating direction of the mating connector, and FIG. 2 (B) shows the coaxial connector of the present invention fitted to the mating connector. FIG. 3 is a perspective view of the combined state as viewed from the direction of connection with the connection target, and FIG. 6C is a cross-sectional view of the state in which the coaxial connector of the present invention and the mating connector are fitted together, taken along the center of the internal conductor. . FIG. 3A is a perspective view of the internal conductor as seen from the fitting direction, and FIG. 3B is a perspective view of the internal conductor as seen from the connection direction. 4A is a perspective view of the insulator viewed from the fitting direction, FIG. 4B is a perspective view of the insulator viewed from a direction opposite to the fitting direction (connection direction), and FIG. FIG. 3 is a cross-sectional view taken along the mounting center of the inner conductor. 5A is a perspective view of the outer conductor seen from the fitting direction, FIG. 5B is a perspective view of the outer conductor seen from the opposite direction (connection direction) to the fitting direction, and FIG. 5C is the outer conductor. FIG. 5 is a cross-sectional view taken along the center of the insulator mounting. FIG. 6A is a perspective view of the engagement member as seen from the fitting direction, FIG. 6B is a perspective view of the engagement member as seen from a direction (connection direction) opposite to the fitting direction, and FIG. It is sectional drawing which carried out the cross section of the compound member by the outer conductor mounting center.

  The coaxial connector 10 will be described with reference to FIGS. 1 to 6. First, the inner conductor 22 will be described. The inner conductor 22 is made of metal, and is manufactured by publicly known press work or cutting work. Since the material of the internal conductor 22 is required to have springiness, conductivity, dimensional stability, etc., brass, beryllium copper, phosphor bronze, etc. can be mentioned. In this embodiment, the inner conductor 22 is fixed to the insulator 24 by press fitting. In this embodiment, they are fixed by press-fitting, but any material can be used as long as they can be fixed, such as hooking (lance), welding, and integral molding.

  The inner conductor 22 has a contact portion 221 that contacts a mating connector, a connection portion 223 that connects to an object to be connected, and a holding portion 222 that is fixed to the insulator 24. The inner conductor 22 has a substantially cylindrical shape.

  The contact portion 221 is appropriately designed so as to follow the shape of the mating connector so as to easily come into contact with the mating connector, but in the present embodiment, has a cylindrical shape. The contact portion 221 is held by the insulator 24 so as not to protrude from the fitting port 14.

The connection part 223 is a part connected to the connection target. A board, a cable, or the like can be considered as the connection target. Examples of the method of connecting to the substrate include soldering (surface mounting or dip) and press fit. As a method of connecting to the cable include the soldering or crimping or pressure contact or the like. In this embodiment, a cable is connected, and the cable is connected to the cable by soldering.

The holding portion 222 may be formed by any method as long as it can be fixed to the insulator 24, and examples thereof include press fitting, hooking (lance), welding, and integral molding. In this embodiment, the insulator 24 is held and fixed by press fitting. The shape and size of the holding portion 222 are appropriately designed in consideration of holding force, workability, strength and the like. The holding portion 222 is located approximately in the middle of the contact portion 221 and the connection portion 223, and is provided with a protrusion in the shape of an arrowhead and press-fitted into the insulator 24 to fix it.

  Next, the insulator 24 will be described. The insulator 24 is an electrically insulating plastic and is manufactured by injection molding or cutting known in the art. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Examples thereof include polybutylene terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. In this embodiment, it is manufactured by injection molding.

The insulator 24 has a substantially convex cross section. The insulator 24 is provided with an insertion hole 241 for holding and arranging the internal conductor 22. The inner conductor 22 is fixed to the insertion hole 241 by press fitting, hooking (lance), welding, or the like. In this embodiment, the inner conductor 22 is fixed by press fitting . The holding portion 222 of the internal conductor 22 is inserted into the insertion hole 241, and the holding portion 222 of the internal conductor 22 is press-fitted into the insertion hole 241 .

  The insulator 24 is provided with a flange 242 on the side opposite to the fitting direction. The flange 24 is for positioning the outer conductor 26. The size and shape of the flange 242 are only required to be able to be inserted into and held by the outer conductor 26, and are appropriately designed in consideration of holding force, strength, workability and the like.

  Next, the outer conductor 26 will be described. The outer conductor 26 is made of metal and is manufactured by publicly known press work or cutting work. Since the material of the outer conductor 26 is required to have springiness, conductivity, dimensional stability, etc., brass, beryllium copper, phosphor bronze and the like can be mentioned. In this embodiment, the insulator 24 is fixed to the outer conductor 22 by press fitting. In this embodiment, they are fixed by press-fitting, but any material can be used as long as they can be fixed, such as hooking (lance), welding, and integral molding.

  The outer conductor 26 has a mounting hole 261 into which the insulator 24 is inserted, a mounting portion 266 in which the engaging member 20 is mounted, a contact unit that contacts the engaging member 20, and a fourth contact that contacts a mating connector. At least the portion 267. Further, in this embodiment, a flange portion 262 is also provided as a portion to be attached to the housing or the like. The flange portion is provided with a recess for attaching to the housing.

  The fourth contact portion 267 is a portion that comes into contact with the mating connector when it is fitted to the mating connector. The fourth contact portion 267 has a flat tip so as to abut against the mating connector. The fourth contact portion 267 only needs to hit the mating connector and come into contact therewith, and is appropriately designed in consideration of contact stability, fitting length, strength, workability, and the like.

  In this embodiment, the mounting hole 261 is provided with a stepped portion to form a two-stepped hole, and the flange 242 of the insulator 24 contacts the stepped portion for positioning. The shape and size of the mounting hole 261 only needs to be such that the insulator 24 can be inserted and positioned, and is appropriately designed in consideration of the fitting length, holding force, strength, and workability.

  A protrusion 263 that protrudes in the outer peripheral (outer) direction is provided at the tip end in the fitting direction. Conventionally, the protruding portion 263 was brought into contact with the mating connector, but in the present invention, the engagement member 20 is for preventing the engagement member 20 from coming off from the outer conductor 26. The shape and size of the protrusion 263 are appropriately designed in consideration of this role, strength, and workability.

  A mounting portion 266 to which the engaging member 20 is mounted is provided between the flange portion 262 and the projecting portion 263 on the side close to the flange portion 262. The shape and size of the mounting portion 266 may be any shape as long as the engaging member 20 can be mounted, but are appropriately designed in consideration of holding force, strength, and workability. In this embodiment, in consideration of the balance of the engagement member 20, the engagement member 20 has a cylindrical shape without steps.

There are the following two methods for contacting the engaging member 20 .
The first is to bend the rear side (the side opposite to the fitting direction) of the protruding portion 263 of the outer conductor 26 (provide a bending portion 264), and to project the protruding piece 202 of the engaging member 20 and the outer conductor 26. The bent portion 264 is brought into contact with the bent portion 264.
Secondly, the projecting piece 202 of the engaging member 20 is bent in the inner peripheral (inner) direction so that the projecting piece 202 of the engaging member 20 and the outer conductor 26 are brought into contact with each other.

  In the present embodiment, the first method is used to bring the edge portion of the bent portion 264 into contact with the engagement member 20 as the third contact portion 265. The third contact portion 265 may have any shape and size as long as it can contact the engaging member 20.

As shown in FIG. 6, a portion projecting to the side opposite to the fitting direction is a connecting portion 268, which is a portion to be connected to a board or a cable. Examples of the method of connecting to the substrate include soldering (surface mounting or dip) and press fit. As a method of connecting to the cable include the soldering or crimping or pressure contact or the like. In this embodiment, the cable is inserted and connected between the connecting portion 268, which is protruded by one, and the connecting portion 223 of the internal conductor 22, which is protruded by one. In this embodiment, the number is one, but a plurality may be provided. The shape and size of the connecting portion 268, along the type and size and shape of the connecting object may be suitably designed in consideration of the connection strength, workability, and the like. In this embodiment, it is connected to the cable and is connected to the cable by soldering.

  Next, the engagement member 20 which is the point of the present invention will be described. The engaging member 20 is made of metal and is manufactured by a publicly known press working or cutting work. Since the material of the engaging member 20 is required to have springiness, conductivity, and dimensional stability, Corson copper, brass, beryllium copper, phosphor bronze and the like can be mentioned. In this embodiment, in order to keep the cost low, press working is used and Corson copper is used. In this embodiment, the engaging member 20 is held by the mounting portion 266 of the outer conductor 26 by elastic force. In this embodiment, the elastic force is used for holding, but any material that can hold the elastic force may be used, such as hooking (lance) and welding.

The engagement member 20 has a main body 201 and a projecting piece 202 projecting from the main body 201 in the fitting direction. The main body 201 has a substantially cylindrical shape, and a part of the main body 201 is cut out for mounting on the outer conductor 26. Further, the main body portion 201 is also a portion that comes into contact with the mating connector. Therefore, the main body 201 has an inner surface that defines the inner space 203 together with the outer peripheral surface of the outer conductor in order to have elasticity.

  As described above, the projecting piece 202 is also a portion that is brought into contact with the third contact portion 265 of the outer conductor 26 to establish conduction with the outer conductor 26. At least two projecting pieces 202 are provided, but three pieces are ideal considering the balance of contact. In this embodiment, three sheets are provided. Ideally, it is desirable that the protruding piece 202 be bent in the inner peripheral (inner) direction.

  Finally, a method of contacting the engaging member 20, the mating connector, and the outer conductor 26 will be described. First, when mated with the mating connector, it comes into contact with the main body 201 of the engaging member 20 and bends inward when the main body 201 is pressed inward. It is lifted outward, and the third contact 265 of the outer conductor 26 and the protruding piece 202 come into contact with each other. Furthermore, a more stable connection can be obtained by bringing the tip of the raised protruding piece 202 into contact with the mating connector.

  As an application example of the present invention, the present invention is applied to a coaxial connector used in cord connecting devices for earphones / headphones, electric devices, electronic devices, etc. It is a thing.

10 Coaxial Connector 12 Fitting Part 20 Engaging Member 201 Body Part 202 Projecting Piece 203 Internal Space 204 First Contact Part 205 Second Contact Part 22 Inner Conductor 221 Contact Part 222 Holding Part 223 Connection Part 224 Convex Part 24 Insulator 241 Insert Hole 242 Flange 26 External conductor 261 Mounting hole 262 Flange portion 263 Projection portion 264 Bent portion 265 Third contact portion 266 Mounting portion 267 Fourth contact portion 268 Connection portion 50 Mating connector 52 Terminal 54 Insulator 56 External conductor

Claims (7)

A coaxial connector that is connected to an object to be connected and that is attached to and detached from a mating connector,
An internal conductor having a contact portion that contacts a terminal of the mating connector and a connection portion that connects to the connection target object, an insulator in which the internal conductor is held and arranged, and the connection target object that covers the insulator. In a coaxial connector including an external conductor to be connected and an engaging member that engages with the mating connector,
The engaging member is made of a conductive material, and has a main body mounted on the outer peripheral surface of the outer conductor, and at least two protruding pieces protruding from the main body toward the mating direction of the mating connector. Then
At least one of the outer conductor and the protruding piece of the engaging member is provided with contact means for contacting each other,
A coaxial connector, wherein an inner surface of the protruding piece and an outer peripheral surface of the outer conductor are brought into contact with each other, and at least an outer surface of the main body portion of the engaging member is brought into contact with an inner surface of the mating connector.   The coaxial connector according to claim 1, wherein the outer conductor is provided with a projecting portion projecting in the outer peripheral (outer) direction at the tip end in the fitting direction with the mating connector.   As the contact means, the outer conductor is bent at a rear side (opposite to the fitting direction) of the protruding portion, and an inner surface of the protruding piece of the engaging member and a bent outer peripheral surface portion of the outer conductor. The coaxial connector according to claim 2, characterized in that   As the contact means, the projecting piece of the engaging member is bent in an inner peripheral (inner) direction to bring the inner surface of the projecting piece of the engaging member into contact with the outer peripheral surface of the outer conductor. The coaxial connector according to Item 1 or 2.   The coaxial connector according to claim 3 or 4, wherein the engaging member is a pressed product. The main body of the engaging member has a substantially C-shaped cross section with a notch provided in a part thereof,
The coaxial connector according to claim 5, wherein the main body portion has an inner surface that defines an inner space together with an outer peripheral surface of the outer conductor so as to have elasticity.   The coaxial connector according to any one of claims 1 to 6, wherein the number of protruding pieces of the engaging member is three for contact balance.

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