JP2012059397A - Center terminal of coaxial cable connector, and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a center terminal of a coaxial cable connector that omits an extra component (terminal ferrule) for impedance matching, improves operability in wire connection, and improves the yield of materials.SOLUTION: The center terminal 30 of the coaxial cable connector has a cylindrically rounded opposite-terminal contact part 32 on one end side and an electric wire crimp part 33, bent in a channel-sectioned shape, on the other end side, and includes a binding part between the opposite-terminal contact part and electric wire crimp part. The binding part is formed as a cylindrically rounded cylindrical part 10, and a part of hoop-molded resin 20 is left at an outer periphery of the cylindrical part as a carrier part 24 for maintaining a hoop shape in which a plurality of terminals are concatenated.

Description

  The present invention relates to a central terminal of a coaxial cable connector and a manufacturing method thereof.

  The coaxial cable has a center conductor, a dielectric, an outer conductor, and an insulation jacket in order from the center of the cross section toward the radially outer side, and the connector for the coaxial cable corresponds to the structure of the coaxial cable. It has a center terminal, an external terminal, and an insulating member that insulates them (see, for example, Patent Document 1).

  3 to 5 show the procedure of the method of connecting the coaxial cable and the connector disclosed in Non-Patent Document 1, and the structure of the conventional connector for coaxial cable and the procedure of the connection are shown using these drawings. explain. The symbols (a) to (m) at the beginning in the following description correspond to (a) to (m) in FIGS. 3 to 5, and the connection proceeds in the order of (a) to (m). .

  (A) First, the end of the coaxial cable W having the center conductor W1, the dielectric W2, the outer conductor (braid) W3, and the insulation jacket (W4) is stripped in order from the center of the cross section toward the radially outer side.

  (B) The center terminal 101 is crimped to the exposed center conductor W1 using a dedicated jig. The center terminal 101 is formed by press-molding a single sheet metal, and has a mating terminal contact portion 101a rounded into a cylindrical shape at one end and an electric wire bent into a U-shaped cross section at the other end. It has the crimping | compression-bonding part 101b, and has the low-profile U-shaped connection part 101c between the other party terminal contact part 101a and the electric wire crimping | compression-bonding part 101b. In addition, a positioning projection 101d is provided on the lower surface.

  (C) The external terminal 102 is inserted into the outer periphery of the insulation jacket W4 of the coaxial cable W.

  (D), (e) The metal outer conductor W3 is spread using a dedicated tool, and the external ferrule 103 is inserted, and the widened outer conductor W3 is put on the outer ferrule 103 and returned. At this time, if there is a copper foil or an aluminum foil W5 below the external conductor W3, the copper foil and the aluminum foil W5 are not spread and are positioned inside the external ferrule 103. Further, the split 103a of the outer ferrule 103 and the projection 101d of the center terminal 101 are aligned and inserted. The external ferrule 103 is inserted inside the insulating jacket W4 (the gap between the insulating jacket W4 and the dielectric W2) until the stepped portion 103b hits the end face of the insulating jacket W4.

  (F), (g) Using a special jig, the terminal ferrule 104 is inserted into the outer periphery of the wire crimping portion 101b of the center terminal 101 from the mating terminal contact portion 101a side until the end portion comes into contact with the dielectric W2. At that time, the slit 104 a of the terminal ferrule 104 and the protrusion 101 d of the center terminal 101 are inserted together.

  (H) The insulating seat 105 having a half structure is fitted to the outside of the center terminal 101. That is, a portion (terminal block) where the center terminal 101 and the terminal ferrule 104 are combined is set on one insulating seat half 105a, and the other insulating seat half 105b is fitted on the opposite side. At that time, the protruding portion 101 d of the center terminal 101 is set in accordance with the slot 105 c of the insulating seat 105. Then, the coaxial cable W is pulled to confirm that the terminal block cannot be removed.

  (I), (j) The external terminal 102 previously inserted is put on the insulating seat 105 with a dedicated jig and assembled. At that time, the driving portion 102 a of the external terminal 102 and the groove portion 105 d of the insulating seat 105 are inserted together and inserted until the insulating seat 105 is locked to the lance 102 b of the external terminal 102.

  (K) The barrels 102c and 102d of the external terminal 102 are crimped to the exposed portion of the outer conductor W3 of the coaxial cable W (the portion covered by the outer ferrule 103) and the portion where the insulating jacket W4 is present using a dedicated jig.

  (L) The portion (outer cylinder block) 110 on which the above-described external terminal 102 is mounted is inserted into the housing 120. At that time, the protrusion 102e of the external terminal 102 and the groove 120a of the housing 120 are inserted together and inserted until the outer cylinder block 110 is locked to the lance of the housing 120.

  (M) Finally, the retainer 122 is inserted into the housing 120 and inserted until the retainer 122 is locked to the housing 120.

JP 2000-260540 A

Hirose Electric Co., Ltd. website, catalog (http://www.hirose.co.jp/catalogue/index.aspx), September 2010 search: Automotive connector PDF download, p. 74-76, "GT16G connection method"

  By the way, the center terminal 101 of the conventional coaxial cable connector described above is such that the connecting portion 101c between the mating terminal contact portion 101a and the wire crimping portion 101b has a low U-shaped cross section. There is a step between the mating terminal contact portion 101a and the rear wire crimping portion 101b. Therefore, as described above, a cylindrical part called a terminal ferrule 104 for impedance adjustment is fitted to the outer periphery of the connecting portion 101c and the wire crimping portion 101b to achieve impedance matching.

  However, as the size of the coaxial cable connector is further reduced, the terminal ferrule 104 is also reduced in size, so that workability is extremely deteriorated when a small component (terminal ferrule 104) is set on the small central terminal 101. There is a risk that it may lead to an increase in processing costs and a decrease in quality.

  In addition, when the center terminal is press-molded into a hoop material, a band-shaped carrier part is generally provided on the rear side of the wire crimping part, but there is a problem that the yield of the material is deteriorated by the amount of the carrier. there were.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to eliminate an extra part (terminal ferrule) for impedance matching and to improve workability at the time of connection. At the same time, it is an object of the present invention to provide a central terminal of a connector for a coaxial cable that can improve the yield of a material, and a method for manufacturing the same.

In order to achieve the above-described object, the center terminal of the coaxial cable connector according to the present invention is characterized by the following (1).
(1) It is formed by press-molding one sheet metal, has a mating terminal contact portion rounded in a cylindrical shape on one end side, and has a wire crimping portion bent in a U-shaped cross section on the other end side, A coaxial cable connector center terminal having a connecting portion between the mating terminal contact portion and the wire crimping portion,
The connecting portion is formed as a cylindrical portion rounded into a cylindrical shape, and a part in the circumferential direction of both end edges in the axial direction of the cylindrical portion is each end in the axial direction of the mating terminal contact portion and the wire crimping portion. By being connected to the edge, the mating terminal contact portion and the wire crimping portion are connected via the cylindrical portion,
Furthermore, a part of the resin hoop-molded as a carrier portion for maintaining a hoop shape in which a plurality of terminals are connected in a chain is left on the outer periphery of the cylindrical portion.

  According to the central terminal of the coaxial cable connector having the configuration (1), the cylindrical portion is provided as a connecting portion that does not cause a step between the mating terminal contact portion and the wire crimping portion. Impedance matching can be achieved without providing extra parts for adjusting the impedance. Therefore, even when the connector is small, the connection work can be facilitated, and the processing cost can be prevented from being increased and the quality can be prevented from being lowered. In addition, the carrier part made of resin can be easily made by hoop-molding the resin on the outer periphery using the cylindrical part, so the carrier part is intentionally secured outside the terminal molding area of the hoop material. Thus, the yield of the metal material can be improved.

In order to achieve the above-described object, a method for manufacturing a central terminal of a coaxial cable connector according to the present invention is characterized by the following (2) to (4).
(2) One end side and the other end in the width direction of a strip-like hoop material for pressing a large number of central terminals having a mating terminal contact portion on one end side and an electric wire crimping portion on the other end side The first and second temporary carrier portions are respectively left on the side, and a part of the first and second temporary carrier portions is interposed between the first and second temporary carrier portions. Make a notch to take a rectangular plate for each terminal while leaving it as a connecting part, and round the rectangular plate inside the notch into a cylindrical shape, so that the axial direction is directed to the one end side and the other end side A first pressing step for pressing the cylindrical portion,
After the first pressing step, the cylindrical shapes adjacent to each other are formed by hoop-molding resin including the outer periphery of the cylindrical portion in the region between the first temporary carrier portion and the second temporary carrier portion. A resin molding step of forming a resin carrier part connecting the cylindrical parts between the parts;
After the resin molding step, the mating terminal contact portion is formed by cutting and bending the first temporary carrier portion into dimensions for each terminal, and the second temporary carrier portion is used as one terminal. A second pressing step of forming the wire crimping portion by cutting and bending each dimension;
After the second pressing step, by separating the resin carrier portion, a separation step of individually separating the center terminal having the mating terminal contact portion, the wire crimping portion, and the cylindrical portion formed on the outer periphery of the resin. When,
Be provided.
(3) In the manufacturing method of the central terminal having the configuration of (2) above,
A wire crimping step of crimping a central conductor of a coaxial cable to the wire crimping portion after the second pressing step and before the disconnecting step;
(4) In the manufacturing method of the central terminal having the configuration of (2) or (3) above,
In the first pressing step, the first temporary carrier portion and the second temporary carrier portion are left outside the notch in removing the rectangular plate between the first temporary carrier portion and the second temporary carrier portion. A bridging portion for bridging between the two temporary carrier portions, and in the resin molding step, the resin is hoop-molded so as to bury the bridging portion, whereby the bridging portion serves as a core material. Forming a carrier part;

According to the manufacturing method of the central terminal of the coaxial cable connector having the configuration (2), the cylindrical portion is provided as a connecting portion that does not cause a step between the mating terminal contact portion and the wire crimping portion. Impedance matching can be achieved without providing extra components for adjusting the impedance. Therefore, even when the connector is small, the connection work can be facilitated, and the processing cost can be prevented from being increased and the quality can be prevented from being lowered. Also, in the resin molding process, the resin carrier part is formed between the adjacent circular shape parts by hoop-molding the resin on the outer periphery using the cylindrical shape part, so that the outside of the terminal molding region of the hoop material as the material Therefore, it is not necessary to secure the carrier part, and the yield of the metal material can be improved. In addition, the resin is hoop-molded at the stage where two flat temporary carrier parts remain in the hoop material, that is, before the second pressing step for molding the mating terminal contact part and the wire crimping part. Molding can be performed easily without difficulty.
According to the method for producing the center terminal of the connector for coaxial cable having the configuration of (3) above, the center of the coaxial cable is connected to the wire crimping portion of each center terminal in a state where a plurality of center terminals are connected in a hoop shape before the disconnecting process. Since the conductor is crimped, a large number of wire connection operations can be efficiently performed by the flow operation.
According to the manufacturing method of the central terminal of the coaxial cable connector having the configuration (4), a bridging portion is secured between the first temporary carrier portion and the second temporary carrier portion in the first pressing step. In the resin molding step, the resin carrier part is formed by using the bridge part as a core material by hoop-molding the resin so that the bridge part is buried, so that a strong resin carrier part can be made.

  According to the present invention, unnecessary parts (terminal ferrule) for impedance matching can be omitted, workability at the time of connection can be improved, and the yield of materials can be improved.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a perspective view which shows a part (a)-(c) of the process of the manufacturing method of the center terminal of embodiment of this invention. It is a perspective view which shows the process (d) and (e) following (c) of FIG. It is a figure which shows a part (a)-(e) of the process at the time of connecting a coaxial cable to the conventional connector for coaxial cables. It is a figure which shows the following process (f)-(j) of (e) of FIG. It is a figure which shows the following process (k)-(m) of (j) of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a part (a) to (c) of steps of a method of manufacturing a central terminal according to an embodiment of the present invention, and FIG. 2 shows steps (d) and (e) next to (c). It is a perspective view.

  First, the center terminal 30 to be manufactured is formed by press-molding one sheet metal, and the shape before connecting the center conductor of the coaxial cable is one end as shown in FIG. It has a mating terminal contact portion 32 rounded in a cylindrical shape on the side, and has a wire crimping portion 33 bent in a U-shaped cross section on the other end side, between the mating terminal contact portion 32 and the wire crimping portion 33. The cylindrical portion 10 is provided as a connecting portion that connects the mating terminal contact portion 32 and the wire crimping portion 33. That is, a part in the circumferential direction of both end edges in the axial direction of the cylindrical portion 10 is connected to each end edge in the axial direction of the mating terminal contact portion 32 and the wire crimping portion 33, so that the mating terminal contact portion 32 and the electric wire are connected. The crimping part 33 is connected via the cylindrical part 10.

  In order to produce a terminal block [with the shape shown in FIG. 2 (e)] in which the central conductor of the coaxial cable is connected while producing the center terminal 30, first, as shown in FIG. One end in the width direction (arrow A direction) of the strip-like hoop material 1 for pressing a large number of central terminals 30 having a mating terminal contact portion 32 and a wire crimping portion 33 on the other end side in a chain. The first and second belt-like temporary carrier portions 2 and 3 are left on the side and the other end side, respectively, and a part of the first and second temporary carrier portions 2 and 3 is partly first. By inserting a notch 5 for taking a rectangular plate for each terminal while leaving it as a connection part between the first temporary carrier part 2 and the second temporary carrier part 2 and 3, and rounding the rectangular board inside the notch into a cylindrical shape The cylindrical portion 10 with the axial direction facing the one end side and the other end side is To less processing (first pressing step).

  At that time, the first temporary carrier part 2 and the second temporary carrier part 2 and the second temporary carrier part 2 are left outside the notch 5 when taking a rectangular plate between the first temporary carrier part 2 and the second temporary carrier part 3. The bridging part 4 that bridges between the parts 3 is secured.

  Next, as shown in FIG. 1 (b), the resin 20 is hoop-molded in the region between the first temporary carrier portion 2 and the second temporary carrier portion 3, including the outer periphery of the cylindrical portion 10. Thus, the resin carrier portion 24 that connects the cylindrical portions 10 to each other is formed between the adjacent cylindrical portions 10 (resin molding step). In the resin molding step, the resin carrier 20 is formed using the bridging portion 4 as a core material by hoop-molding the resin 20 so as to bury the bridging portion 4.

  Next, as shown in FIG. 1 (c), the first temporary carrier portion 2 is cut into a dimension for each terminal and bent to form the mating terminal contact portion 32, and the second temporary carrier portion 2 is formed. The electric wire crimping portion 33 is formed by cutting the carrier portion 3 into a size for each terminal and bending it (second pressing step).

  Next, as shown in FIG. 2 (d), the center conductor W1 of the coaxial cable W is crimped to the wire crimping portion 33 (wire crimping step), and finally, as shown in FIG. 2 (e), the resin carrier By cutting the portion 24, the center terminal 30 having the mating terminal contact portion 32, the wire crimping portion 33, and the cylindrical portion 10 in which the resin 20 is formed on the outer periphery is individually separated (separation step), and the terminal block is separated. obtain.

  As described above, according to the method of the present embodiment, the cylindrical portion 10 is provided between the mating terminal contact portion 32 and the wire crimping portion 33 as a connecting portion that does not generate a step, so that it is like a conventional terminal ferrule. Impedance matching can be achieved without providing unnecessary parts for impedance adjustment. Therefore, even when the connector is small, the connection work can be facilitated, and the processing cost can be prevented from being increased and the quality can be prevented from being lowered. Further, in the resin molding process, the resin carrier portion 24 is formed between the adjacent cylindrical shape portions 10 by forming the resin 20 on the outer periphery of the cylindrical shape portion 10 by using the cylindrical shape portion 10. It is not necessary to dare to secure the carrier portion outside the forming region, and the yield of the metal material can be improved. Further, at the stage where two flat temporary carrier parts 2 and 3 remain in the hoop material, that is, at the stage prior to the second pressing step for forming the mating terminal contact part 32 and the wire crimping part 33, the resin 20 is added. Since the hoop molding is performed, the resin molding can be easily performed without difficulty.

  In addition, since the central conductor W1 of the coaxial cable W is crimped to the wire crimping portion 33 of each central terminal 30 in a state where the plurality of central terminals 30 are connected in a hoop shape before the separation process, a large number of connection operations can be performed. It can be done efficiently.

  Further, in the first pressing step, a bridging portion 4 is secured between the first temporary carrier portion 2 and the second temporary carrier portion 3, and in the resin molding step, the bridging portion 4 is buried. Since the resin carrier portion 24 is formed by using the bridge portion 4 as a core material by hoop-molding 20, the resin carrier portion 24 having strength can be made.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 1 Hoop material 2 1st temporary carrier part 3 2nd temporary carrier part 4 Bridging part 5 Notch 10 Cylindrical part 20 Resin 24 Resin carrier part 30 Center terminal 32 Counterpart contact part 33 Electric wire crimping part

Claims (4)

The mating terminal is formed by press-molding one sheet metal, has a mating terminal contact portion rounded into a cylindrical shape on one end side, and an electric wire crimping portion bent in a U-shaped cross section on the other end side. A central terminal of a coaxial cable connector having a connecting portion between a contact portion and a wire crimping portion,
The connecting portion is formed as a cylindrical portion rounded into a cylindrical shape, and a part in the circumferential direction of both end edges in the axial direction of the cylindrical portion is each end in the axial direction of the mating terminal contact portion and the wire crimping portion. By being connected to the edge, the mating terminal contact portion and the wire crimping portion are connected via the cylindrical portion,
Furthermore, a part of resin hoop-molded as a carrier part for maintaining a hoop shape in which a plurality of terminals are connected in a chain is left on the outer periphery of the cylindrical part. Connector central terminal. On one end side and the other end side in the width direction of the band plate-shaped hoop material for pressing a large number of central terminals having a mating terminal contact portion on one end side and an electric wire crimping portion on the other end side, The first and second temporary carrier portions are left, respectively, and a part of the first and second temporary carrier portions serves as a connecting portion between the first and second temporary carrier portions. A cylindrical shape in which the axial direction is directed to the one end side and the other end side by making a notch for taking a rectangular plate for each terminal while leaving and rounding the rectangular plate inside the notch into a cylindrical shape A first pressing step of pressing the part;
After the first pressing step, the cylindrical shapes adjacent to each other are formed by hoop-molding resin including the outer periphery of the cylindrical portion in the region between the first temporary carrier portion and the second temporary carrier portion. A resin molding step of forming a resin carrier part connecting the cylindrical parts between the parts;
After the resin molding step, the mating terminal contact portion is formed by cutting and bending the first temporary carrier portion into dimensions for each terminal, and the second temporary carrier portion is used as one terminal. A second pressing step of forming the electric wire crimping part by cutting and bending each dimension;
After the second pressing step, by separating the resin carrier portion, a separation step of individually separating the center terminal having the mating terminal contact portion, the wire crimping portion, and the cylindrical portion formed on the outer periphery of the resin. When,
A method for producing a central terminal of a connector for a coaxial cable, comprising:   3. The coaxial cable connector center terminal according to claim 2, further comprising an electric wire crimping step of crimping a central conductor of the coaxial cable to the electric wire crimping portion after the second pressing step and before the disconnecting step. Manufacturing method.   In the first pressing step, the first temporary carrier portion and the second temporary carrier portion are left outside the notch in removing the rectangular plate between the first temporary carrier portion and the second temporary carrier portion. A bridging portion for bridging between the two temporary carrier portions, and in the resin molding step, the resin is hoop-molded so as to bury the bridging portion, whereby the bridging portion serves as a core material. 4. The method for producing a center terminal of a coaxial cable connector according to claim 2, wherein a carrier portion is formed.

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