JP4615331B2 - Speaker cable plug and socket, and speaker cable connector using the plug and socket - Google Patents

Description

  The present invention relates to a connector for a speaker cable, and more particularly to a speaker cable plug and socket suitable for a connection cable between an amplifier and a speaker of a multi-channel speaker system in the audio field, and a speaker cable connector using the same. .

  In recent years, so-called home theater systems that can experience the power and realism of movie theaters are also becoming popular at home. Listeners add a high level of reality and powerful sound effects from multi-channel sound, for example, 5.1 channel sound system corresponding to the screen image displayed on the large screen, and the conventional AV system. You can enjoy video and sound that you can't get.

  As a speaker cable connector in such a sound system, the inventors of the present invention include a terminal holding tongue piece for holding a speaker terminal in a hollow plug body and a cable holding tongue piece for holding a twisted wire of the speaker cable. The thing which inserted the terminal which has is proposed previously (for example, refer patent document 1).

  The multi-channel sound system for home theaters mentioned above is expected to have higher output in the future due to its acoustic effect, force, and realism, but the amplifier side will have higher output. When the speaker output is increased, it is considered that a current of 20 to 30 A may flow instantaneously through the speaker cable. If so, in the structure of the connection terminal of the speaker cable connector previously proposed, There is concern in terms of durability.

In addition, in speaker cable plugs and sockets where large currents may flow as described above, and speaker cable connectors based on such plugs and sockets, electrical conductors such as metal hairpins may be accidentally inserted into sockets. Then, a current may flow through the human body through the contact tongue and the conductor of the terminal, which may cause an electric shock, and may cause an unexpected trouble due to a short circuit.
Japanese Patent Laid-Open No. 2004-72761

  Therefore, the present invention has a simple structure and extremely high insulation performance, so that a large current can flow safely and stably, and the plug and socket for the speaker cable, regardless of the insertion direction, and It is an object of the present invention to provide a speaker cable connector.

The structure of the speaker cable connector of the present invention made for the purpose of solving the above problems comprises a plug to which the speaker cable is connected and a socket into which the plug is inserted, the plug being a plug insertion hole of the socket. electrically insulating material made of a plug body having a cable insertion portion contiguous to the fixed portion and the fixed portion of the continuous wire to the spigot and the difference addition unit having an internal space that fitted in the guide arranged in the center of the inner but first plug-side disposed within the interior space of the insertion portion for contacting the first socket side contact to expose part of small width groove formed on the outer surface of the furnished the guide to guide the socket contact with, the socket plug insertion hole second arranged on the outer surface of the spigot for contacting the second side of the socket contacts arranged on the inner surface of Comprising a lug-side contact, and the insertion portion and the first plug-side contact and a second plug-side contacts are formed symmetrically relates vertically and horizontally as viewed the plug from the front,
The socket includes a guide that holds a gap between the plug insertion hole and the inner peripheral wall of the insertion hole and is provided in the center of the insertion hole and has a plurality of narrow grooves along the insertion direction on the outer surface. A socket body made of an electrically insulating material, a first socket-side contact disposed in the guide with a part exposed from the narrow groove, and a second socket disposed on the inner peripheral surface of the plug insertion hole. A socket-side contact, and the plug insertion hole has a symmetrical cross-sectional shape in the vertical and horizontal directions when viewed from the front, and the guide also has a symmetrical cross-sectional shape in the vertical and horizontal directions. The guide is arranged in the plug insertion hole with the center aligned, and the first plug-side contact is provided with a cross-sectional shape corresponding to the insertion hole and the guide .

  In the speaker cable connector of the present invention, the plug insertion hole has a symmetrical cross-sectional shape in the vertical and horizontal directions, the guide has a symmetrical cross-sectional shape in the vertical and horizontal directions, and the insertion hole and the guide are in the center. It is desirable that the first plug-side contact be provided with a cross-sectional shape corresponding to the plug insertion hole and each guide. Here, it is more convenient that the plug insertion hole has a substantially square cross section, and the guide disposed therein also has a substantially square cross section.

  Furthermore, in the speaker cable connector according to the present invention, the socket may include a movable member that moves when a plug is inserted, and a pair of control contacts that are opened and closed by the movable member.

The speaker cable connector of the present invention comprises a plug to which the speaker cable is connected and a socket into which the plug is inserted,
An insertion portion that forms an internal space in which the plug fits into a guide disposed in the center of the socket in the plug insertion hole of the socket, a fixing portion of the core wire continuous to the insertion portion, and a cable insertion portion continuous to the fixing portion. A first socket side in which a plug body made of an electrically insulating material is disposed in an internal space of the insertion portion and is partly exposed from a narrow groove formed on the outer surface of the guide, which is embedded in the guide of the socket A first plug-side contact that contacts the contact, and a second plug-side contact that contacts the second socket-side contact disposed on the inner surface of the plug insertion hole of the socket. Prepared,
The socket includes a guide that holds a gap between the plug insertion hole and the inner peripheral wall of the insertion hole and is provided in the center of the insertion hole and has a plurality of narrow grooves along the insertion direction on the outer surface. A socket body made of an electrically insulating material, a first socket-side contact disposed in the guide with a part exposed from the narrow groove, and a second socket disposed on the inner peripheral surface of the plug insertion hole. Since it is formed with the socket side contact, it is possible to realize a high insulation performance with a simple structure, to allow a large current to flow, and there is no directionality in plug insertion.

  That is, the socket in the speaker cable connector of the present invention is made of an electrically insulating material, and includes a socket body provided with a plug insertion hole and a guide having a plurality of narrow grooves in the plug hole, and a guide that is partially exposed from each narrow groove. Since the first socket-side contact disposed inside and the second socket-side contact disposed outside the guide and disposed inside the plug insertion hole, the first socket-side contact and the first contact There is a guide made of an insulating material between the two socket side contacts, and the first socket side contact is disposed inside the guide with a part exposed from the narrow groove. Even if the test finger is inserted, the conductive portion of the connector is not contacted.

  The first socket-side contact in the socket is partly exposed from the plurality of small-width grooves and disposed inside the guide, while the first plug-side contact in the plug is exposed from each of the small-width grooves. Since the contact is made with the plurality of first socket side contact portions, the number of contact lines increases, thereby increasing the contact area. In addition, since the second plug-side contact on the plug side that contacts the first socket-side contact is disposed on the outer surface of the plug insertion portion and has a large contact area, it is compatible with the plurality of line contacts. As a result, a large current can flow.

  Further, in the speaker cable connector of the present invention, the socket plug insertion hole, the guide, the first socket side contact, and the second socket side contact are formed symmetrically both vertically and horizontally with respect to the center line of the socket. The plug side to be inserted into the socket suffices if the insertion portion, the first plug side contact, and the second plug side contact are formed corresponding to the above-described symmetrical shape, and this allows the plug to the socket. Since there is no direction in both the top and bottom and left and right, the plug connection polarity of the speaker is never reversed as long as a plug is inserted into the socket.

  Furthermore, in the speaker cable connector of the present invention, the socket is opened and closed by the movable member that moves when the plug is inserted, and the movable member, and the first socket side contact or the second socket side contact is opened. Alternatively, if the structure is provided with a control contact that opens and closes both, the first socket-side contact is conducted only when the plug is inserted, so that a safer connector can be obtained.

  Next, referring to the drawings, an embodiment of the speaker cable connector of the present invention, and a plug and a socket constituting the connector will be described. The illustrated speaker cable connector of the present invention is for connecting a speaker and a speaker cable, and the speaker cable and a speaker output terminal of an amplifier in a multi-channel sound system. FIG. 1 is a perspective view showing an amplifier side socket provided in an amplifier and an amplifier side plug of a speaker cable in an example of implementation of the speaker cable connector of the present invention, and FIG. 2 is a speaker side socket and a speaker side plug of the speaker cable. 3 is an enlarged perspective view of the amplifier-side socket, FIG. 4 is a cross-sectional view of the amplifier-side socket along the line AA in FIG. 3, and FIG. 5 is a perspective view showing the relationship between the guide and the contact in the amplifier-side socket. 6 is a perspective view of a contact in the amplifier side socket of FIG. 5, FIG. 7 is an enlarged perspective view of an amplifier side (speaker side) plug, FIG. 8 is a perspective view of the plug of FIG. 7 is a cross-sectional view taken along line BB of the plug of FIG. 7, and FIG. 10 is a plan view showing a connection state in which the amplifier side (or speaker side) plug is fitted to the amplifier side (or speaker side) socket. 11 is a vertical sectional view showing the relationship between the socket side contact and the plug side contact along the line HH in FIG. 10, FIG. 12 is a perspective view showing an example of the speaker side socket, and FIG. FIG. 14 is a perspective view showing another embodiment of the amplifier side socket in the speaker cable connector of the present invention, and FIG. 15 is an amplifier side socket along the line DD in FIG. FIG. 16 is a plan sectional view showing a connection state between the amplifier side socket and the amplifier side plug shown in FIG. 14, and FIG. 17 is an amplifier side socket and an amplifier side plug according to another embodiment of the speaker cable connector of the present invention. It is a plane sectional view showing a connection state.

  As shown in FIGS. 1 and 2, the speaker cable connector of the present invention includes an amplifier side socket 100 for six channels fixed to the amplifier 10 and a speaker side socket for one channel fixed to the speaker enclosure 20. 200, an amplifier side plug 300 connected to both ends of each of six speaker cables 30 having appropriate lengths and diameters, and a speaker side plug 400 having the same configuration as the plug 300.

  The amplifier 10 includes a socket that is a speaker output terminal for a 5.1 channel sound system, for example, and includes an amplifier circuit for 6 channels. Therefore, the amplifier side socket 100 includes six sockets having the same configuration. The amplifier 10 is attached in parallel to the back of the case and is electrically connected to the amplifier circuit of each channel.

  As shown in FIG. 3, the six amplifier-side sockets 100 are accommodated and fixed in a single molded casing 101. As shown in FIG. 4, each amplifier-side socket 100 includes a socket body 102 formed by molding a synthetic resin material to form a plug insertion hole 106, which will be described later, a guide 103 positioned at the center of the insertion hole 106, and the guide 103 A first socket-side contact 104 and a second socket-side contact 105 that are press-fitted inside from the back are provided. Here, the socket body 102 and the guide 103 are formed of an electrically insulating synthetic resin molding, and the contacts 104 and 105 are formed of a metal conductor.

  The socket body 102 is formed in a rectangular parallelepiped shape, and a plug insertion hole 106 having a substantially square cross section is provided on the front side.

  The guide 103 positioned substantially at the center of the insertion hole 106 has a substantially square cross section. In the illustrated example, the guide 103 has three prismatic guide portions, and each guide portion is a rear side excluding the tip of the prismatic portion. Are arranged in three steps in the vertical direction (three rows in the horizontal direction) via the narrow grooves 103a formed between the prismatic portions. The guide 103 is disposed inside the plug insertion hole 106 so that a gap is formed between the inner wall surface of the plug insertion hole 106 and the center of the plug insertion port 106 is aligned with the center. The guide 103 is formed integrally with the socket body 102 so as to extend from the bottom surface (inner back surface) of the plug insertion hole 106 toward the opening side of the plug insertion hole 106.

  The first socket side contact 104 is press-fitted into the guide 103 and incorporated. That is, as shown in FIG. 6, the first socket-side contact 104 is viewed from the plane in which the lateral tongue 108 is arranged in a direction in which one end of the vertically suspended hanging tongue 107 is bent at a right angle in the horizontal direction. It is formed in a substantially L shape. 5 and 6, two cutouts 109 each having a substantially E shape are formed at the tip of the lateral wall-like tongue piece 108, and the tip side of the lateral tongue piece 108 positioned at the bottom of each cutout 109 is tapered. The taper surface 109a is formed.

  As shown in FIG. 5, the first socket side contact 104 is mounted and fixed to the socket main body 102 by being positioned by press-fitting the lateral tongue 108 into the guide 103. That is, the notch 109 at the tip is positioned in the narrow groove 103 a between the three prismatic guide portions of the guide 103, and the space behind the socket body 102 is inserted into the press-fitting space of the contact 104 formed inside the guide. It is inserted by press-fitting. Thereby, a part of the notch 109 is exposed from the narrow groove 103 a between the guides 103.

  As shown in FIG. 4, the second socket-side contact 105 includes a rectangular tubular body 110 having a cross-sectional shape corresponding to the cross-sectional shape of the plug insertion hole 106 and a tongue extending downward from the lower wall of the rectangular tubular body 110. It consists of a piece 111. The rectangular tubular body 110 is fitted in the plug insertion hole 106 in contact with the inner peripheral wall surface of the plug insertion port 106. Further, in the second socket side contact 105, a presser ring 112 having a shape along the plug insertion hole 106 is fitted into the plug insertion hole 106 from the front side of the hole to prevent the second socket side contact 105 from coming out. is doing. A part of the upper wall of the rectangular cylindrical body 110 of the contact 105 is bent in a substantially mountain shape toward the inside of the plug insertion hole 106 to form a spring-like stopper 110a.

  On the other hand, the amplifier-side plug 300 of the speaker cable (in the present invention, the speaker-side plug 400 has the same structure as the plug 300 and will not be described), as shown in FIGS. A hollow plug body 301 having a substantially cross shape is provided. One branch 302 (the left side of FIGS. 7 and 9 and the right side of FIG. 8) of the plug body 301 is an insertion part with respect to the socket 100, and a branch part 303 on the opposite side is a speaker cable insertion part. Branch portions 304 and 305 that are orthogonal to each other are formed as a core wire fixing portion of the speaker cable. Hereinafter, in this specification, 302 is a socket insertion portion, 303 is a cable insertion portion, and 304 and 305 are core wire fixing portions.

  The insertion portion 302 has a cross-sectional outline corresponding to the plug insertion hole 106 of the socket 100. An opening 306 having a shape corresponding to the cross-sectional outer shape of the guide 103 in the socket 100 is formed at the tip, and a rib 307 corresponding to the narrow groove 103 a is provided on the inner wall surface of the opening 306. A first plug-side contact 308 is incorporated inside (see FIG. 11).

  As shown in FIGS. 9, 10 and 11, the first plug-side contact 308 includes two rectangular tube-like bodies 309 that fit into the prismatic guides of the guide 103 inside the insertion portion 302. It is equipped with a space. A slit 309 a having a width corresponding to the thickness of the first socket-side contact 104 is formed on the opposing walls of the rectangular tubular bodies 309 in succession to the rib 307. Further, a flat tongue piece 310 is integrally formed on the upper wall of one of the rectangular tubular bodies 309. The tongue 310 extends toward the inside of the speaker cable insertion portion 303. A cable core fixing portion 305 positioned near the front of the cable insertion portion 303 accommodates a rectangular tube-shaped cable retainer 311 that is open at the front and rear. A free end of the tongue piece 310 enters an inside of a cable presser 311 housed in the core wire fixing portion 305. The presser screw 312 is screwed into the upper wall of the cable presser 311.

  On the other hand, as shown in FIG. 7, the second plug-side contact 313 has an external rectangular tube 314 having a cross-sectional outer shape covering the outer surface of the insertion portion 302 in the plug main body 301. A square opening 314a is provided on both side walls of the rectangular tube 314 (see FIGS. 7 and 8). The external rectangular tube 314 is fitted on the outer surface of the insertion portion 302 from the front. As shown in FIG. 10, the tongue piece 315 extending straight from the rear end of the external rectangular tube 314 is accommodated in the core wire fixing portion 304 inside the speaker cable insertion portion 303 through the slit in the plug main body 301. The cable retainer 316 extends inside. A presser screw 317 is screwed into the outer wall of the core wire fixing portion 304 in the core wire fixing portion 304 in a direction orthogonal to the inserted core wire. The fixing of the core wire in the present invention is not limited to the presser screws 312 and 317, and for example, a spring force can be used as a fixing means for the core wire.

  Next, as shown in FIG. 9, in the speaker cable 30, the plus side cable 31 and the minus side cable 33 are inserted into the inside through the opening in the speaker cable insertion portion 303, and the presser screws 312 and 317 are tightened. Thus, the core wire 32 of the plus side cable 31 is sandwiched between the tongue piece 310 and the cable retainer 311, and the core wire 34 of the minus side cable 33 is sandwiched between the tongue piece 315 and the cable retainer 316. The speaker side plug 400 in the speaker cable 30 has the same configuration as the amplifier side plug 300. In FIG. 9, the presser screw 312 is shown in a tightened state, and the presser screw 317 is shown in a state before tightening.

  Also, the speaker side socket 200 has the same configuration as the amplifier side socket 100. 12 and 13 show details of the speaker-side socket 200. FIG. The speaker-side socket 200 includes a socket body 202, a guide 203, a first socket-side contact 204, and a second socket-side contact 205. A part of the first socket side contact 204 except the tip is exposed from the small-width groove 203 a and is press-fitted into the three prismatic guides 203 and incorporated. The second socket-side contact 205 has a cross-sectional shape corresponding to the cross-sectional shape of the plug insertion hole 206 and includes a rectangular tubular body 210 that is fitted into the plug insertion port 106. As illustrated in FIG. 2, the speaker-side socket 200 is fixed in such a manner that the socket body 202 is embedded in the back surface of the speaker enclosure 20, and the contacts 204 and 205 are electrically connected to the speaker.

  In the speaker cable connector according to the present invention, for example, as shown in FIG. 10, when the amplifier side plug 300 is inserted into the amplifier side socket 100, the rectangular tubular body 309 inside the first plug side contact 308 is connected to the amplifier side socket 100. As shown in FIG. 11, while the slit 309a of the rectangular tube-shaped body 309 is expanded, the tapered surface 109a passes through the narrow groove 103a between the guides 103 in the first socket side contact 104, as shown in FIG. The first socket side contact 104 and the first plug side contact 308 come into contact with each other. At the same time, the rectangular tubular body 314 outside the second plug-side contact 313 of the amplifier-side plug 300 is fitted into the rectangular tubular body 110 of the second socket-side contact 105 of the amplifier-side socket 100, and the opening 314a is stopped. 110a, the amplifier-side plug 300 is lightly locked to the amplifier-side socket 100.

  When the amplifier-side plug 300 is inserted into the amplifier-side socket 100 as described above, the first socket-side contact 104 and the first plug-side contact 308 are in line contact at two locations, and the second socket-side contact 105 and the second plug-side contact 313 are in surface contact. Since a large contact area is realized by this line contact and surface contact, even if a large value of current flows, troubles such as burning are not caused at all.

  In the above insertion, even if the amplifier-side plug 300 is turned upside down and inserted into the amplifier-side socket 100, the amplifier-side socket 100 is formed symmetrically with respect to a horizontal line or a vertical line passing through the center of the amplifier-side plug 100. Since 300 is formed symmetrically with respect to a horizontal line or a vertical line passing through the center, the contacts 104 and 308 and the contacts 105 and 313 are reliably in contact with each other in any insertion posture.

  In addition, when the amplifier side plug 300 is not inserted into the amplifier side socket 100, the first socket side contact 104 has an insulating property even if a metal conductor such as a ballpoint pen is inserted into the amplifier side socket 100. The metal conductor is in contact with the first socket-side contact 104 because the contact 104 is accommodated inside the guide 103 made of synthetic resin and exposed only from the portion of the narrow groove 103a. There is no. Therefore, even if there is an insertion of a metal conductor, no current flows and it is extremely safe.

  As described above, even when the speaker-side plug 400 is inserted into the speaker-side socket 200, the contact area is large as described above, and even if the speaker-side plug 400 is inserted upside down, it is reliably energized, and the speaker-side socket 200 is made of metal. If you try to insert a conductor, you cannot insert it.

  Next, the speaker cable connector of the present invention may have a function of energizing only when the amplifier side plug is inserted into the amplifier side socket. 14 to 16 show an example of the speaker cable connector of the present invention to which such a function is added.

  The present speaker cable connector shown in FIGS. 14 to 16 is for a two-channel stereo amplifier, for example, and has two amplifier-side sockets 500. Each amplifier-side socket 500 has a socket body 502, a prismatic guide 503 having a narrow groove 503a, and a part thereof exposed from the narrow groove 503a, in the same manner as the amplifier-side socket 100 shown in FIGS. The first socket side contact 504 incorporated inside the guide 503 and the second socket side contact 505 disposed in the socket insertion hole 506 with a space between the guide 503 and the guide 503 are formed. Therefore, the contact area between the plug and socket contacts is large, and even if a large current flows, troubles such as burning will not occur, and even if a metal conductor such as a metal ballpoint pen is inserted, current will flow through the metal conductor. The socket 100 also has various functions and effects such that it does not flow, and even when the plug is inserted upside down, it is surely energized. Is the same as that.

  Here, the amplifier side socket 500 of FIGS. 14 to 16 is normally connected to the amplifier circuit only when the amplifier side plug is inserted, with the socket side contacts 504 and 505 being disconnected from the amplifier circuit. It is designed to improve safety.

  For this reason, as shown in FIG. 15, the presser ring 512 of each amplifier side socket 500 extends in a horizontal direction in which a part of the side wall is extended and protrudes from an opening formed in the side wall of the second socket side contact 505. It is configured as a moving actuator 521.

A pair of control contacts 522 and 524 are arranged parallel to the side wall of the presser ring 512 and supported by the socket body 502. The upper edge of the control contact 522 is bent in the horizontal direction, and a tongue piece 523 is integrally formed. The control contact 524 is provided with an elastic tongue 525 that is partially cut out and bends around the front edge. The elastic tongue 525 is always in contact with the tongue 523 and the actuator 521 is in contact with the elastic tongue 525 at all times.

  When the amplifier side socket 500 is attached to the amplifier, as an example, if the first socket side contact 504 and the second socket side contact 505 are connected to the amplifier circuit via a relay, the control contact 522 and 524 are connected to the control circuit of the relay. When the control contact 522 and the control contact 524 are in contact, the relay control circuit opens the relay contact and disconnects the first socket side contact 504 and the second socket side contact 505 from the amplifier circuit. It shall be.

  Now, as shown in FIG. 16, when the amplifier side plug 300 of the speaker cable is inserted into the amplifier side socket 500, the first socket side contact 504 of the socket 500 and the first plug side contact 308 of the plug are connected. The second socket side contact 505 of the socket 500 and the second plug side contact 313 of the plug come into contact with each other. At the same time, the actuator 521 is pushed by the socket insertion portion 302 to disconnect the elastic tongue 525 from the tongue 523 of the control contact 522. When disconnected, the control circuit can close the relay tongue and connect the first socket side contact 504 and the second socket side contact 505 to the amplifier circuit.

  The amplifier-side socket with a switch as described above may be formed so that the control contact is always open and is closed when the amplifier-side plug is inserted. FIG. 17 shows an example of such an amplifier side socket.

  The connector of FIG. 17 is also for a two-channel stereo amplifier and has two amplifier-side sockets 600. Each amplifier-side socket 600 is similar to the amplifier-side socket 100 shown in FIGS. 1 and 3 to 6, and includes a socket body 602, three guides 603, a first socket-side contact 604, and a second socket-side contact. 605.

  In the example of FIG. 17 as well, a part of the side wall of the presser ring 612 is cut off and configured as an actuator 621 that moves in the horizontal direction. A control contact 624 is disposed in parallel with the side wall of the presser ring 512 and is supported by the socket body 602. The control contact 624 has a substantially U shape in plan view, and is composed of a fixed piece 624b and an elastic piece 624a separated from the fixed piece 624b.

  Also in the case of this amplifier side socket 600, when it is attached to the amplifier as an example, the first socket side contact 504 and the second socket side contact 505 are connected to the amplifier circuit through a relay, and one piece of the control contact 622 is provided. 624a and 624b are connected to a relay control circuit. Since the control contact 622 is disconnected in the relay control circuit, the relay contact is opened, and the first socket side contact 604 and the second socket side contact 605 are disconnected from the amplifier circuit.

  Here, when the amplifier-side plug 300 of the speaker cable is inserted into the socket 600 of FIG. 17, the first socket-side contact 604 of the socket 600 and the first plug-side contact 308 of the plug come into contact with each other. The second socket side contact 605 contacts the second plug side contact 313 of the plug. At the same time, the actuator 621 of the presser ring 612 is pushed by the socket insertion portion 302 to bring the elastic piece 624a into contact with the fixed piece 624b. By this contact, the relay control circuit closes the relay contact and connects the first socket side contact 604 and the second socket side contact 605 to the amplifier circuit.

  The embodiment of the speaker cable connector of the present invention described above has been described as a connector for a speaker cable for connecting the speaker cable to an amplifier and a speaker. However, the speaker cable connector of the present invention has high insulation performance and is large. Since electric current can flow and there is no directionality in the plug and socket insertion, it can also be used as a cable connector in electrical equipment other than audio equipment.

  The present invention is as described above, and adopts a contact mode for ensuring conduction of a large current, a contact mode that can reliably prevent contact of a test finger from the outside, and an arrangement mode thereof. Since the present invention can be applied not only to a speaker cable connector in a video system or the like but also to a power cable connector for general electric equipment, it is extremely useful industrially.

The perspective view which shows the amplifier side socket provided in amplifier, and the amplifier side plug of a speaker cable in an example of implementation of the speaker cable connector of this invention. The perspective view of the speaker side plug of a speaker side socket and a speaker cable. The expansion perspective view of an amplifier side socket. Sectional drawing of the amplifier side socket which follows the AA line of FIG. The perspective view which shows the relationship between the guide and contact in an amplifier side socket. The perspective view of the contact in the amplifier side socket of FIG. The expansion perspective view of an amplifier side (speaker side) plug. The perspective view which looked at the plug of FIG. 7 from the other side. Sectional drawing which follows the BB line of the plug of FIG. FIG. 3 is a plan sectional view showing a connection state in which an amplifier side (or speaker side) plug is fitted into an amplifier side (or speaker side) socket. FIG. 11 is a vertical cross-sectional view showing a relationship between a socket-side contact and a plug-side contact along line HH in FIG. 10. The perspective view which shows an example of the speaker side socket. Sectional drawing of the speaker side socket in alignment with CC line of FIG. The perspective view which shows the other Example of the amplifier side socket in the connector for speaker cables of this invention. Sectional drawing of the amplifier side socket which follows the DD line | wire of FIG. FIG. 15 is a plan sectional view showing a connection state between the amplifier side socket and the amplifier side plug shown in FIG. The plane sectional view which shows the connection state of the amplifier side socket and amplifier side plug by another Example of the connector for speaker cables of this invention.

Explanation of symbols

10 amplifier 20 speaker enclosure 30 speaker cable 31 plus side cable 32 core wire 33 minus side cable 34 core wire 100 amplifier side socket 101 housing 102 socket body 103 guide 103a narrow groove 104 first socket side contact 105 second socket side contact 106 Plug insertion port 107 Hanging tongue 108 Lateral tongue 109 Notch 109a Tapered surface 110 Square cylindrical body 110a Stopper 111 Tongue piece 112 Presser ring 200 Speaker side socket 202 Socket body 203 Guide 203a Narrow groove 204 First socket side contact 205 Second socket side contact 206 Plug insertion hole 210 Square tubular body 300 Amplifier side plug 301 Plug body 302 Insertion part (branch part)
303 Speaker cable insertion part (branch part)
304 Core wire fixing portion 305 Core wire fixing portion 306 Opening 307 Rib 308 First plug side contact 309 Square cylindrical body 309a Slit 310 Tongue piece 311 Cable holder 312 Press screw 313 Second plug side contact 314 External square cylindrical body 314a Opening 315 Tongue 316 Cable retainer 317 Presser screw 400 Speaker side plug 500 Amplifier side socket 502 Socket body 503 Guide 503a Narrow groove 504 First socket side contact 505 Second socket side contact 506 Socket insertion hole 512 Presser ring 521 Actuator 522 Control Contact 523 Tongue piece 524 Control contact 600 Amplifier side socket 602 Socket body 603 Guide 604 First socket side contact 605 Second socket side contact 612 Presser ring 62 The actuator 622 controls contacts 624 controls contacts 624a elastic piece 624b fixed piece

Claims (7)

An insertion portion having an internal space that is externally fitted to a guide disposed in the center of a plug insertion hole of a socket into which a plug is inserted, a fixing portion of a core wire continuous to the insertion portion, and a cable insertion portion continuous to the fixing portion inside the spigot for preparative electrically insulating material made of the plug body having contacts the first socket side contacts a portion thereof being exposed from the small width groove formed on the outer surface of the guide is furnished with the guide of the socket A first plug-side contact disposed in the space and a second plug-side contact disposed on the outer surface of the insertion portion to contact the second socket-side contact disposed on the inner surface of the plug insertion hole of the socket. provided, and the spigot and the first plug-side contact and a second plug-side contact, shape symmetrical in the vertical and horizontal saw the plug from the front Speaker plug for cable, characterized in that it is. An electricity provided with a gap between the plug insertion hole and the inner peripheral wall of the insertion hole, with a guide disposed in the center of the insertion hole and formed with a plurality of narrow grooves on the outer surface along the plug insertion direction. A socket body made of an insulating material has a first socket-side contact disposed inside the guide with a part exposed from the narrow groove, and a second socket-side disposed on the inner peripheral surface of the plug insertion hole. The plug insertion hole and the guide are concentric, and the insertion hole, the guide, the first socket side contact, and the second socket side contact are related to the top, bottom, left and right when the socket is viewed from the front. A speaker cable plug socket characterized by being formed symmetrically . A movable member that is displaced when the plug is inserted, and a control that is opened and closed by the movable member and opens or closes the first socket side contact, the second socket side contact, or both of the contacts. 3. The socket of claim 2, comprising a contact. It consists of a plug to which the speaker cable is connected and a socket into which the plug is inserted.
An insertion portion having an internal space in which a plug is externally fitted to a guide disposed at the center of the plug insertion hole of the socket, a fixing portion of a core wire continuous to the insertion portion, and a cable insertion portion continuous to the fixing portion. electrically insulating material made of the plug body included in the decorated in the socket guide the first inner space of the insertion portion for contacting the socket-side contact to expose part of small width groove formed on the outer surface of the guide a first plug contacts arranged in, comprising a second plug-side contact disposed on the outer surface of the spigot for contacting the second side of the socket contacts arranged on the inner surface of the plug insertion hole of the socket, The insertion portion, the first plug-side contact, and the second plug-side contact are formed symmetrically with respect to the top and bottom and the left and right when the plug is viewed from the front. ,
The socket includes a guide that holds a gap between the plug insertion hole and the inner peripheral wall of the insertion hole and is provided in the center of the insertion hole and has a plurality of narrow grooves along the insertion direction on the outer surface. A socket body made of an electrically insulating material, a first socket-side contact disposed in the guide with a part exposed from the narrow groove, and a second socket disposed on the inner peripheral surface of the plug insertion hole. A socket-side contact, and the plug insertion hole has a symmetrical cross-sectional shape in the vertical and horizontal directions when viewed from the front, and the guide also has a symmetrical cross-sectional shape in the vertical and horizontal directions. A speaker cable connector, characterized in that the guide is arranged in the plug insertion hole with the center aligned, and the first plug-side contact is provided with a cross-sectional shape corresponding to the insertion hole and the guide . The connector according to claim 4 , wherein the plug insertion hole is formed in a substantially square cross section, and the guide is formed in a substantially square cross section with a gap between the guide hole and the inner peripheral wall of the insertion hole. Is formed on the entire inner wall surface of the second socket-side contact plug insertion hole, the second plug-side contact plug insertion hole of the guide the outer wall surface of the hollow tube shape according to claim 4 or 5 is formed to cover the connector. A movable member that moves when the plug is inserted, and a pair that opens and closes by the movable member and opens and closes the first socket side contact, the second socket side contact, or both of the contacts. 7. The connector according to claim 4 , further comprising a control contact.

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