JP2020064830A - Connection device, plug and socket - Google Patents

Abstract

To obtain a connection device capable of eliminating a need for preparing a configuration in which a plug and a cable are integrated.SOLUTION: A connection device comprises: a first terminal electrically connected with a core wire of a cable; a second terminal 5 that includes a supporting part supporting the first terminal via an insulator, and a cylinder part electrically connected with a lead wire of the cable; an insulation cover 6 that covers an outer periphery of the supporting part; an insulation cap 7 that covers an outer periphery of the cylinder part; and a machine screw for fixing the lead wire to the second terminal 5. The cylinder part is formed with an opening into which the machine screw is inserted. The insulation cap 7 covers the machine screw inserted into the opening and covers the outer periphery of the cylinder part in a state of being attached to the cylinder part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connecting device, a plug and a socket for making an electrical connection.

  As a conventional plug and jack, a plug detachment prevention structure with improved versatility has been proposed (for example, see Patent Document 1). In the plug detachment prevention structure disclosed in Patent Document 1, when the plug integrated with the cable is connected to the jack, the elastic portion corrects an error in accuracy between the plug fixing portion and the plug and the jack.

JP, 2011-54349, A

  In the plug disclosed in Patent Document 1, since the plug and the cable are integrated, it is necessary to prepare in advance a plug and a cable corresponding to the type of jack that are integrally configured.

  The present invention has been made to solve the above problems, and provides a connecting device, a plug, and a socket that do not require the preparation of an integrated plug and cable.

  A connecting device according to the present invention is a connecting device to which a cable having a core wire and a conductor wire different from the core wire is connected, and a first terminal electrically connected to the core wire and the above-mentioned via an insulator. A second terminal including a support portion supporting the first terminal and a cylindrical portion into which the cable is inserted and electrically connected to the conducting wire; an insulating cover covering an outer periphery of the support portion; and the cylinder. An insulating cap that covers the outer periphery of the portion, and a screw that fixes the conductive wire to the second terminal, an opening into which the screw is inserted is formed in the cylindrical portion, and the insulating cap is In a state of being attached to the cylindrical portion, the screw inserted into the opening is covered and the outer periphery of the cylindrical portion is covered.

  The plug according to the present invention is a case where the above-mentioned connecting device is a plug. The socket according to the present invention is the case where the above connection device is a socket.

  According to the present invention, by inserting a cable into a connection device and fixing the cable with a screw, electrodes can be easily and electrically connected to each other at each contact of the first terminal and the second terminal without soldering. You can Therefore, it is not necessary to prepare in advance a plug and a cable integrally configured.

FIG. 3 is an external view showing a configuration example of the plug according to the first embodiment of the present invention. FIG. 2 is an external view of the plug shown in FIG. 1 when viewed from below. It is an external view which shows the state which removed the cap in the plug shown in FIG. It is sectional drawing of the plug shown in FIG. FIG. 3 is a schematic external view showing a configuration example of a cable attached to the plug according to Embodiment 1 of the present invention. It is a figure which shows an example of the procedure which attaches a cable to the plug shown in FIG. FIG. 7 is an external perspective view showing another configuration example of the plug according to Embodiment 1 of the present invention. It is an external view when the plug shown in FIG. 7 is seen from another direction. It is sectional drawing of the plug shown in FIG. It is an external appearance perspective view which shows one structural example of the socket which concerns on Embodiment 2 of this invention. It is an external view which shows the structural example when the socket shown in FIG. 10 is seen from another direction. It is an external view which shows the state which removed the cap in the socket shown in FIG. It is sectional drawing of the socket shown in FIG. It is a figure which shows an example of the procedure which attaches a cable to the socket shown in FIG. FIG. 11 is an external view showing a configuration example of a connector in which the plug shown in FIG. 1 and the socket shown in FIG. 10 are combined. It is a figure which shows another structural example of the insulating cap shown in FIG. It is a figure which shows an example of the procedure which attaches the insulating cap shown in FIG. 16 to a plug main body. It is a cross-sectional schematic diagram which shows another structural example of the insulating cap shown in FIG. It is a figure for demonstrating another structural example of the cylindrical part of the plug shown in FIG. It is a figure which shows an example of the procedure which attaches the cap shown in FIG. 18 to the cylindrical part shown in FIG.

Embodiment 1.
The configuration of the connection device according to the first embodiment will be described. In the first embodiment, the case where the connecting device is a plug will be described. In addition, in the first embodiment, a case will be described where terminals can be electrically connected to each other without soldering.

  FIG. 1 is an external view showing a configuration example of a plug according to Embodiment 1 of the present invention. FIG. 2 is an external view of the plug shown in FIG. 1 when viewed from below. FIG. 3 is an external view of the plug shown in FIG. 1 with the cap removed. FIG. 4 is a sectional view of the plug shown in FIG.

  As shown in FIG. 1, the plug 1 includes a first terminal electrically connected to a core wire of a cable (not shown) and a second terminal 5 electrically connected to a conductor different from the core wire of the cable. And an insulating cap 6 that covers a part of the outer periphery of the second terminal 5, and an insulating cap 7. In FIG. 1, the first terminal is covered by the second terminal 5 and is therefore not shown in the figure. Although not shown in FIG. 1, a first screw having a spiral thread and a thread groove is provided on the inner peripheral surface of the insulating cap 7. The material of the first terminal and the second terminal 5 is a conductive metal. The material of the insulating cover 6, the insulator 4, and the insulating cap 7 is resin, for example.

  As shown in FIG. 3, the second terminal 5 has a cylindrical portion 5a having an insertion port 8 into which a cable is inserted. The cylindrical portion 5a is provided with a second screw 12 corresponding to the first screw. The cylindrical portion 5a is provided with an opening 9 for fixing the conductor of the cable to the second terminal 5 with a screw 20.

  As shown in FIG. 4, the first terminal 3 has a first pin 3a connected to the core wire and a second pin 3b connected to a socket (not shown). In the configuration example shown in FIG. 4, the axial direction of the first pin 3a (parallel to the Z-axis arrow) and the axial direction of the second pin 3b (parallel to the X-axis arrow) are perpendicular. In the plug 1 shown in FIG. 4, the first terminal 3 is L-shaped.

  Further, as shown in FIG. 4, the second terminal 5 includes a cylindrical portion 5a, a support portion 5b that supports the first terminal 3 through the insulator 4, and a pin that is connected to a socket (not shown). 5c and. The outer periphery of the support portion 5b is covered with an insulating cover 6. Referring to FIG. 1, in the plug 1, in the second terminal 5, the outer periphery of the pin 5c is exposed, but the outer periphery of the supporting portion 5b is covered with the insulating cover 6, and the outer periphery of the cylindrical portion 5a is insulative. Covered with a cap 7. Therefore, when the plug 1 is connected to the socket, the outer periphery of the second terminal 5 is covered with the insulating member. As a result, even if the user touches the plug 1, there is no electric shock.

  Next, a method for attaching the cable to the plug 1 according to the first embodiment will be described. First, the configuration of the cable will be described. FIG. 5 is a schematic external view showing a configuration example of a cable attached to the plug according to the first embodiment of the present invention. The cable shown in FIG. 5 is a stranded cable 30.

  As shown in FIG. 5, the stranded cable 30 has a core wire 31 and a conductor wire 33 different from the core wire 31. The core wire 31 has a structure in which a plurality of single conductive thin wires are twisted together. The core wire 31 is covered with an insulator 32. Conductors 33 are provided in a mesh shape on the outer periphery of the insulator 32. The conductor 33 is covered with a protective film 34. The material of the core wire 31 and the conducting wire 33 is, for example, copper. The material of the insulator 32 is polyethylene, for example. The material of the protective film 34 is vinyl, for example.

  FIG. 6 is a diagram showing an example of a procedure for attaching a cable to the plug shown in FIG. In FIG. 6, a cross section of the tip portion of the stranded cable 30 is schematically shown for the sake of explanation. In reality, only the cut surface of the stranded cable 30 is exposed, and the portion other than the cut surface is covered with the protective film 34.

  The user passes the insulating cap 7 shown in FIG. 1 through the stranded cable 30. Subsequently, the user inserts the stranded cable 30 into the insertion port 8 of the cylindrical portion 5a as shown in FIG. 6A with the screw 20 loosened. Then, the user pushes the stranded cable 30 into the cylindrical portion 5a as shown in FIG. 6 (b). When the core wire 31 is pressed against the first pin 3a, the stranded wire of the core wire 31 is unwound and comes into contact with the first pin 3a so as to cling to the first pin 3a. The user holds the screw 20 in the opening 9 while the core wire 31 is pressed against the first pin 3 a. At that time, the screw 20 penetrates the protective film 34 and reaches the conducting wire 33. The conductive wire 33 contacts the screw 20 and is fixed by the screw 20, so that the conductive wire 33 is electrically connected to the cylindrical portion 5 a of the second terminal 5 via the screw 20. After that, as shown in FIG. 6C, the user engages the first screw of the insulating cap 7 shown in FIG. 1 with the second screw 12 and turns the insulating cap 7 to rotate the insulating cap 7. Is attached to the cylindrical portion 5a of the second terminal 5.

  In this manner, the user fixes the core wire 31 and the conductor wire 33 to the plug 1 in a state where the core wire 31 is in contact with the first terminal 3 and the conductor wire 33 is in contact with the second terminal 5 via the screw 20. Can be made. Therefore, without soldering, the core wire 31 and the first terminal 3 are surely electrically connected, and the conducting wire 33 and the second terminal 5 are surely electrically connected.

  The plug 1 according to the first embodiment includes the first terminal 3 electrically connected to the core wire 31, the second terminal 5 electrically connected to the lead wire 33, and the insulation covering the outer periphery of the support portion 5b. The insulating cover 7 has an elastic cover 6 and an insulating cap 7 that covers the outer periphery of the cylindrical portion 5a. The cylindrical portion 5a of the second terminal 5 is formed with an opening 9 into which the screw 20 for fixing the conductor 33 is inserted. The insulating cap 7 is configured to cover the screw 20 inserted into the opening 9 and the outer periphery of the cylindrical portion 5a while being attached to the cylindrical portion 5a.

  According to the first embodiment, the user inserts the cable into the plug 1 and fixes the cable with the screw 20, so that the electrodes are connected to each other at each contact of the first terminal 3 and the second terminal 5 without soldering. A simple and reliable electrical connection can be made. The user does not need to prepare in advance what has a plug and a cable corresponding to the type of socket integrally configured. For example, if the user prepares the plug 1 corresponding to the diameter of the socket in advance, the cable can be connected to the socket by connecting the cable to the plug 1 on the spot and connecting the plug 1 to the socket.

  Further, according to the first embodiment, since the outer peripheral surface of the metal portion of the plug 1 is covered with the insulating member, it is possible to prevent an electric shock even if the user touches the energized plug. For example, when the plug is used in an electronic musical instrument for playing music, it may be necessary to insert and remove the plug that is energized. For example, in order to shorten the interruption time of the performance, the user may insert / remove the plug while continuing to energize. Even in such a case, in the plug 1 of the first embodiment, the outer peripheral surface of the metal member is covered with the insulating member, so that the user can be prevented from receiving an electric shock. Also, when it is raining due to outdoor music performances, the user's hands get wet and it is easy to get an electric shock. Even in such a case, the plug 1 according to the first embodiment can suppress electric shock when the user touches the plug 1.

  Further, according to the first embodiment, since the outer peripheral surface of the metal portion of the plug 1 is covered with the insulating member, even if the user mistakenly brings a metal component such as another plug into contact with the plug 1, It is possible to prevent an electrical short circuit from occurring between the plug 1 and the metal component. Even if there is a metal component in the immediate vicinity of the plug 1, it is possible to prevent an electrical short circuit. Further, the user can cut the cable to the required length, insert it into the plug 1 and fasten the screw 20, and the electrodes will be connected to each other, so there is no need to prepare cables of various lengths in advance, The degree of freedom in selecting the length is increased. Furthermore, the user can electrically connect the second terminal 5 and the conductive wire by inserting the cut cable into the plug 1 and fastening the screw 20 without removing the protective film of the cable to expose the conductive wire of the outer layer. Can be connected to. Therefore, the user can save the trouble of peeling off the protective film of the cable and exposing the outer conductor wire.

  Further, in the first embodiment, the first screw is formed on the inner peripheral surface of the insulating cap 7, the second screw 12 is formed on the cylindrical portion 5 a, and the insulating cap 7 is formed by the second screw 12. It is attached to the cylindrical portion 5a by engaging the first screw with. In this case, the screw 20 that fixes the cable to the second terminal 5 is covered with the insulating cap 7, and the insulating cap 7 has the first screw and the second screw 12 meshed with each other so that the second terminal 5 It is fixed to. Therefore, it is possible to prevent the screw 20 from loosening and prevent the cable from coming off the plug 1. For example, the cable may be pulled when the user changes the cable or changes the connection destination of the plug 1. Each time, a force is applied to the cable in the direction to pull it out of the plug 1. Even in such a case, according to the first embodiment, the cable is fixed to the plug 1 with the screw 20 and the screw 20 is covered with the insulating cap 7, so that the screw 20 can be prevented from loosening. . As a result, it is possible to prevent the cable from being loosened and coming out of the plug 1.

  In the first embodiment, the case where the first terminal 3 is L-shaped has been described, but the shape of the first terminal 3 is not limited to the L-shaped. The shape of the first terminal 3 may be such that the axial direction of the first pin 3a and the axial direction of the second pin 3b are parallel. FIG. 7 is an external perspective view showing another configuration example of the plug according to the first embodiment of the present invention. FIG. 8 is an external view of the plug shown in FIG. 7 when viewed from another direction. FIG. 9 is a sectional view of the plug shown in FIG. The same components as those of the plug shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIGS. 7 to 9, the plug 1 a has a first terminal 3, a second terminal 5, an insulating cover 6, and an insulating cap 7. In the plug 1a, the axial direction of the first pin 3a and the axial direction of the second pin 3b are parallel and the axes overlap. Also in the plug 1a shown in FIGS. 7 to 9, the same effect as that of the plug 1 described with reference to FIGS. 1 to 6 can be obtained.

Embodiment 2.
The configuration of the connection device according to the second embodiment will be described. In the second embodiment, the case where the connection device is a socket will be described. In the second embodiment, a case will be described where terminals can be electrically connected to each other without soldering. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

  FIG. 10 is an external perspective view showing a configuration example of the socket according to Embodiment 2 of the present invention. FIG. 11 is an external view showing a configuration example when the socket shown in FIG. 10 is viewed from another direction. FIG. 12 is an external view showing a state in which the cap is removed from the socket shown in FIG. FIG. 13 is a sectional view of the socket shown in FIG.

  The socket 2 includes a first terminal 23 electrically connected to a core wire of a cable (not shown), a second terminal 25 electrically connected to a conductor different from the core wire of the cable, and a second terminal. It has an insulating cover 26 that covers a part of the outer periphery of 25, and an insulating cap 7. As described in the first embodiment, the inner peripheral surface of the insulating cap 7 is provided with the first screw not shown in FIG. In FIG. 10, the second terminal 25 is covered with the insulating cover 26 and the insulating cap 7, and thus is not shown in the drawing. The material of the first terminal 23 and the second terminal 25 is a conductive metal. The material of the insulating cover 26 and the insulating cap 7 is resin, for example. As shown in FIG. 11, in the socket 2, an insertion port 8 into which a cable is inserted is provided on the opposite side of the first terminal 23.

  As shown in FIG. 12, the second terminal 25 has a cylindrical portion 25a having an insertion port 8 into which a cable is inserted. The cylindrical portion 25a is provided with a second screw 12 corresponding to the first screw. The cylindrical portion 25a is provided with an opening 9 for fixing the conducting wire of the cable to the second terminal 25 with the screw 20.

  As shown in FIG. 13, the second terminal 25 has a cylindrical portion 25 a and a support portion 25 b that supports the first terminal 23 via the insulator 4. The outer periphery of the support portion 25b is covered with an insulating cover 26. In FIG. 13, the axial direction (parallel to the X-axis arrow) of the first terminal 23 is indicated by a broken line for explanation. When a plug (not shown) is connected to the socket 2, the surface s1 of the supporting portion 25b that is closest to the plug in the axial direction indicated by the broken line is the surface of the insulating cover 26 that is closest to the plug. It is located closer to the cylindrical portion 25a than the surface s2. That is, a step is provided between the surface s1 and the surface s2, and the surface s1 is closer to the cylindrical portion 25a than the surface s2 in the axial direction indicated by the broken line. The step distance x1 is, for example, 0.1 to 0.5 mm.

  As can be seen from FIG. 13, in the socket 2 of the second embodiment, the second terminal 25 has the outer periphery of the support portion 25b covered with the insulating cover 26, and the cylindrical portion 25a covered with the insulating cap 7. It is being appreciated. Therefore, the outer periphery of the second terminal 25 is covered with the insulating member. As a result, even if the user touches the socket 2, there is no electric shock. Further, in the axial direction of the first terminal 23, a step is provided between the surface s1 of the support portion 25b closest to the plug and the surface s2 of the insulating cover 26 closest to the plug to be connected. , The surface s1 is closer to the cylindrical portion 25a than the surface s2. Therefore, when the socket 2 is connected to the plug, it is possible to prevent the periphery of the tip of the support portion 25b on the plug side from being exposed.

  Next, a method for attaching the cable to the socket 2 according to the second embodiment will be described. Here, a case where the stranded cable 30 described with reference to FIG. 5 is connected to the socket 2 will be described. FIG. 14 is a diagram showing an example of a procedure for attaching a cable to the socket shown in FIG. In FIG. 14, a cross section of the tip portion of the stranded cable 30 is schematically shown for the sake of explanation.

  The user passes the insulating cap 7 shown in FIG. 10 through the stranded cable 30. Subsequently, the user inserts the stranded cable 30 into the insertion port 8 of the cylindrical portion 25a as shown in FIG. 14A with the screw 20 loosened. Then, the user pushes the stranded cable 30 into the cylindrical portion 25a as shown in FIG. 14 (b). When the core wire 31 is pressed against the first terminal 23, the stranded wire of the core wire 31 is unwound and contacts the first terminal 23 so as to cling to the first terminal 23. The user holds the screw 20 in the opening 9 with the core wire 31 being pressed against the first terminal 23. At that time, the screw 20 penetrates the protective film 34 and reaches the conducting wire 33. The conductive wire 33 comes into contact with the screw 20 and is fixed by the screw 20, whereby the conductive wire 33 is electrically connected to the cylindrical portion 25 a of the second terminal 25 via the screw 20. Thereafter, as shown in FIG. 14C, the user engages the first screw of the insulating cap 7 shown in FIG. 10 with the second screw 12 and turns the insulating cap 7 to rotate the insulating cap 7. Is attached to the cylindrical portion 25a of the second terminal 25.

  In this way, the user fixes the core wire 31 and the conductor wire 33 to the socket 2 in a state where the core wire 31 is in contact with the first terminal 23 and the conductor wire 33 is in contact with the second terminal 25 via the screw 20. Can be made. Therefore, without soldering, the core wire 31 and the first terminal 23 are surely electrically connected, and the conductor wire 33 and the second terminal 25 are surely electrically connected.

  The socket 2 according to the second embodiment includes the first terminal 23 electrically connected to the core wire 31, the second terminal 25 electrically connected to the conductor wire 33, and the insulation covering the outer periphery of the support portion 25b. The elastic cover 6 and the insulating cap 7 that covers the outer periphery of the cylindrical portion 25a. The cylindrical portion 25a of the second terminal 25 is formed with an opening 9 into which the screw 20 for fixing the conducting wire 33 is inserted. The insulating cap 7 is configured to cover the screw 20 inserted into the opening 9 and the outer periphery of the cylindrical portion 25a while being attached to the cylindrical portion 25a.

  According to the second embodiment, the user inserts the cable into the socket 2 and fixes the cable with the screw 20, so that the electrodes are connected to each other at each contact of the first terminal 23 and the second terminal 25 without soldering. A simple and reliable electrical connection can be made. The user does not need to prepare in advance what has a socket and a cable corresponding to the type of plug integrally configured. For example, the user can prepare a socket 2 corresponding to the diameter of the plug in advance, connect the cable to the socket 2 on the spot, and connect the socket 2 to the plug to connect the cable to the plug.

  Further, according to the second embodiment, since the outer peripheral surface of the metal portion of the socket 2 is covered with the insulating member, it is possible to prevent an electric shock even if the user touches the energized plug. Also in the second embodiment, as in the first embodiment, the outer peripheral surface of the metal portion of the socket 2 is covered with the insulating member, so that the user mistakenly inserts another metal component such as a plug into the socket 2. It is possible to prevent an electrical short circuit from occurring between the socket 2 and the metal component even if they are brought into contact with. Further, the user can cut the cable to a required length, insert it into the socket 2 and fasten the screw 20 to connect the electrodes to each other, so that it is not necessary to prepare cables of various lengths in advance, The degree of freedom in selecting the length is increased. Further, even if the user does not peel off the protective film of the cable to expose the conductor wire of the outer layer, if the cut cable is directly inserted into the socket 2 and the screw 20 is fastened, the second terminal 25 and the conductor wire are electrically connected. Can be connected to. Therefore, the user can save the trouble of peeling off the protective film of the cable and exposing the outer conductor wire.

  Further, in the second embodiment, the first screw is formed on the inner peripheral surface of the insulating cap 7, the second screw 12 is formed on the cylindrical portion 25 a, and the insulating cap 7 is formed by the second screw 12. The first screw is engaged with and is attached to the cylindrical portion 25a. In this case, the screw 20 that fixes the cable to the second terminal 25 is covered with the insulating cap 7, and the insulating cap 7 has the first screw and the second screw 12 meshed with each other to form the second terminal 25. It is fixed to. Therefore, it is possible to prevent the screw 20 from loosening and prevent the cable from coming off the socket 2. When the socket 2 of the second embodiment is used for music performance, the same effect as that of the first embodiment can be obtained.

  Although the case where the connecting device is the plug 1 has been described in the first embodiment and the case where the connecting device is the socket 2 has been described in the second embodiment, the connecting device is a connector in which the plug 1 and the socket 2 are combined. May be. FIG. 15 is an external view showing a configuration example of a connector in which the plug shown in FIG. 1 and the socket shown in FIG. 10 are combined. As shown in FIG. 15, the connector 50 has a plug 1 and a socket 2. Connector 50 has a function of relaying voltage transmission, in addition to the effects described in the first and second embodiments.

  Further, although the plug 1 of the first embodiment and the socket 2 of the second embodiment play a role of transmitting electricity, for example, an AC (AC) current may be transmitted, It may transmit a direct current (DC) current. Furthermore, although the case where the cable connected to the connection device is a stranded cable has been described in the first and second embodiments, the cable is not limited to the stranded cable. The cable may be a coaxial cable.

  Further, in the plug 1 of the first embodiment and the socket 2 of the second embodiment, when the user fastens the screw 20, the screw 20 penetrates the protective film 34 and is electrically connected to the conductive wire 33. However, it is not limited to the screw 20. The screw 20 is not required as long as it is a conductor member that can penetrate the protective film 34 and can be fixed to the cylindrical portions 5a and 25a.

  Further, in the first and second embodiments, the case where the fixing means to the cylindrical portion of the insulating cap is a screw has been described, but the fixing means is not limited to a screw. Hereinafter, an example of a lock structure using a fixing means other than screws will be described in the case of the plug 1 of the first embodiment, but it may be the case of the connecting device described in the second embodiment. 16: is a figure which shows another structural example of the insulating cap shown in FIG. 16A is an external view of the insulating cap, and FIG. 16B is a schematic sectional view of the insulating cap.

  In the insulating cap 7 shown in FIG. 16A, when the opposite side of the cable insertion port 62 is the tip side of the insulating cap 7, the slit 61 is formed on the tip side of the insulating cap 7. In the configuration example shown in FIG. 16A, four slits 61 are formed. Further, as shown in FIG. 16B, a claw portion 63 protruding to the central axis side of the insulating cap 7 is formed on the tip end side of the insulating cap 7. No first screw is formed on the inner peripheral surface of the insulating cap 7 shown in FIG.

  FIG. 17 is a diagram showing an example of a procedure for attaching the insulating cap shown in FIG. 16 to the plug body. Although FIG. 17 shows the case where the stranded cable 30 is attached to the cylindrical portion 5a of the plug 1, the illustration of the sectional structure of the stranded cable 30 is omitted in the drawing. Further, as shown in FIG. 17, the cylindrical portion 5a is not provided with the second screw 12 shown in FIG. 3, but is provided with an annular protrusion 46.

  After the user attaches the stranded cable 30 to the plug body, the insulating cap 7 is moved in the arrow direction of FIG. The claw portion 63 at the tip of the insulating cap 7 contacts the annular protrusion 46 of the cylindrical portion 5a. At this time, since the slit 61 shown in FIG. 16A is provided at the tip of the insulating cap 7, as shown in FIG. 17B, the tip of the insulating cap 7 is based on the central axis. Spread in the radial direction. When the user further moves the insulating cap 7, the claw portion 63 passes through the annular protrusion 46, and the diameter of the tip end side of the insulating cap 7 returns to the original size. As a result, as shown in FIG. 17C, the claw portion 63 is caught by the annular protrusion 46, and the insulating cap 7 is hard to come off from the plug body.

  Next, another example of the fixing means will be described. FIG. 18 is a schematic sectional view showing another configuration example of the insulating cap shown in FIG. In the insulating cap 7 shown in FIG. 18, when the opposite side of the cable insertion port 62 is the tip side of the insulating cap 7, a groove 64 is formed on the tip side of the insulating cap 7. The groove 64 is formed along the inner circumference of the insulating cap 7. The first screw is not formed on the inner peripheral surface of the insulating cap 7 shown in FIG.

  FIG. 19 is a diagram for explaining another configuration example of the cylindrical portion of the plug shown in FIG. FIG. 19A is a cross-sectional view showing one configuration example of the plug, and FIG. 19B is an enlarged schematic view of the fixing portion shown in FIG. 19A. As shown in FIG. 19 (a), the cylindrical portion 5a is not provided with the second screw 12 shown in FIG. 3, but is provided with an annular protrusion 46. Further, a fixing portion 80 for fixing the insulating cap 7 is provided on the annular protrusion 46. In FIG. 19A, the illustration of the sectional structure of the fixed portion 80 is omitted. In the configuration example shown in FIG. 19A, one fixed part 80 is provided, but a plurality of fixed parts 80 may be provided.

  As shown in FIG. 19B, the fixed portion 80 has a pin 81, a spring 82, and a cylindrical body 83. A spring 82 is provided inside the cylindrical body 83. The upper surface of the cylindrical body 83 is provided with an opening 84 for exposing a part of the pin 81. The pin 81 is attached to the upper side of the spring 82. The pin 81 maintains its position in the Z-axis direction by being pushed in the Z-axis arrow direction by the elastic force of the spring 82. When the pin 81 is pushed in the direction opposite to the Z-axis arrow, the spring 82 contracts and the pin 81 is set inside the cylindrical body 83. When the force that pushes the pin 81 in the direction opposite to the Z-axis arrow disappears, the pin 81 projects above the upper surface of the cylindrical body 83 by the elastic force of the spring 82 and maintains the original state.

  20 is a diagram showing an example of a procedure for attaching the cap shown in FIG. 18 to the cylindrical portion shown in FIG. Although FIG. 20 shows the case where the stranded cable 30 is attached to the cylindrical portion 5a of the plug 1, illustration of the cross-sectional structures of the stranded cable 30 and the fixing portion 80 is omitted.

  After the user attaches the stranded cable 30 to the plug body, the insulating cap 7 is moved in the arrow direction of FIG. The tip of the insulating cap 7 hits the pin 81 of the fixing portion 80, but when the user pushes the insulating cap 7 in the direction opposite to the X-axis arrow, as shown in FIG. It is pushed by and fits inside the cylindrical body 83 shown in FIG. 19 (b). Then, when the user further moves the insulating cap 7, as shown in FIG. 20C, the pin 81 projects from the cylindrical body 83 into the groove 64 of the insulating cap 7 by the elastic force of the spring 82. The pin 81 protruding into the groove 64 pushes the insulating cap 7 in the Z-axis arrow direction by the elastic force of the spring 82. As a result, as shown in FIG. 20C, the pin 81 is caught in the groove 64, and the insulating cap 7 is hard to come off from the plug body.

  Although an example of the fixing means other than the screw has been described with reference to FIGS. 16 to 20, the fixing means of the insulating cap 7 to the connection device body is two of the plurality of fixing means including the case of the screw. You may combine the above.

  1, 1a Plug, 2 Socket, 3 First terminal, 3a First pin, 3b Second pin, 4 Insulator, 5 Second terminal, 5a Cylindrical part, 5b Support part, 5c pin, 6 Insulation Cover, 7 insulating cap, 8 insertion port, 9 opening, 12 second screw, 20 screw, 23 first terminal, 25 second terminal, 25a cylindrical portion, 25b supporting portion, 26 insulating cover, 30 twist Wire cable, 31 core wire, 32 insulator, 33 conductor wire, 34 protective film, 46 annular protrusion, 50 connector, 61 slit, 62 cable insertion port, 63 claw part, 64 groove, 80 fixing part, 81 pin, 82 spring, 83 cylindrical body, 84 openings, s1, s2 planes.

Claims (5)

A connecting device to which a cable having a core wire and a conductor different from the core wire is connected,
A first terminal electrically connected to the core wire;
A support portion that supports the first terminal via an insulator, and a second terminal that includes the cylindrical portion into which the cable is inserted and that is electrically connected to the lead wire;
An insulating cover that covers the outer periphery of the support portion,
An insulating cap that covers the outer periphery of the cylindrical portion,
A screw for fixing the conductive wire to the second terminal,
An opening into which the screw is inserted is formed in the cylindrical portion,
The insulating cap is configured to cover the screw inserted into the opening and the outer periphery of the cylindrical portion in a state of being attached to the cylindrical portion.
Connection device. A first screw is formed on the inner peripheral surface of the insulating cap,
A second screw corresponding to the first screw is formed on the cylindrical portion,
The connection device according to claim 1, wherein the insulative cap is configured to be attached to the cylindrical portion by engaging the first screw with the second screw. The connection device according to claim 1 or 2 is a plug,
The first terminal is
A first pin electrically connected to the core wire;
A second pin to which the socket is connected,
A plug in which the axial direction of the first pin and the axial direction of the second pin are perpendicular to each other. The connection device according to claim 1 or 2 is a plug,
The first terminal is
A first pin electrically connected to the core wire;
A second pin to which the socket is connected,
A plug in which the axial direction of the first pin and the axial direction of the second pin are parallel. The connection device according to claim 1 or 2 is a socket,
In the axial direction of the first terminal, a surface of the supporting portion that is closest to the plug to be connected is closer to a surface of the insulating cover that is closest to the plug to be connected. A socket in a position close to the cylindrical portion.

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