Connecting Devices

Abstract

In a connection device having three electrodes, a cable that transmits signals corresponding to the three electrodes is connected without soldering. [Solution] A connection device in which a first cable having a first core wire and a first shield wire and a second cable having a second core wire and a second shield wire are connected without soldering, and the connection device includes a first electrode, a second electrode, and a third electrode, a first connection pin electrically connected to the first electrode and the first core wire, a second connection pin electrically connected to the second electrode and the second core wire, and a housing that houses the first cable and the second cable and is electrically connected to the third electrode and at least one of the first shield wire and the second shield wire.

Description

[Technical field]

[0001] The present invention relates to a connection device for connecting cables without soldering. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is known a two-pole plug that has two electrodes and is connected to a cable having a core wire and a shield wire, and that does not require soldering for connecting the cable (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-168289 Summary of the Invention [Problem to be solved by the invention]

[0004] There is an increasing demand for three-pole plugs or three-pole jacks that have three electrodes and are used for transmitting stereo signals or balanced signals, etc. However, in the past, there had been no sufficient consideration of technology for connecting cables that transmit signals corresponding to the three electrodes of a three-pole plug or three-pole jack without soldering.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to connect a cable that transmits signals corresponding to three electrodes in a connection device having three electrodes without soldering. [Means for solving the problem]

[0006] The connection device according to the present invention is a connection device in which a first cable having a first core wire and a first shield wire and a second cable having a second core wire and a second shield wire are connected without soldering. The connection device is a phone plug. , Tip included A first electrode, Including ring A second electrode, and It is a sleeve a third electrode, a first connection pin electrically connected to the first electrode and the first core wire, a second connection pin electrically connected to the second electrode and the second core wire, a housing that houses the first cable and the second cable and is electrically connected to the third electrode and at least one of the first shielded wire and the second shielded wire; a first attachment portion connected to the first electrode and to which a first connection pin is attached, and a second attachment portion into which a second connection pin is inserted; Equipped with The second mounting portion has insulating properties and is disposed between the second electrode and the first mounting portion. . Effect of the Invention

[0007] The connection device of the present invention has a first connection pin electrically connected to the first electrode and the core of the first cable, and a second connection pin electrically connected to the second electrode and the core of the second cable, and therefore the connection device of the present invention can connect cables that transmit signals corresponding to three electrodes. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is an external view showing a plug, a first cable, and a second cable according to the first embodiment. [Diagram 2] 2 is a schematic diagram showing the internal structure of a cable attached to a plug in accordance with the first embodiment. FIG. [Diagram 3] FIG. 1 is a plan view showing a plug according to a first embodiment. [Figure 4] FIG. 1 is a perspective view showing a plug according to a first embodiment. [Diagram 5] FIG. 2 is a cross-sectional view showing a plug according to the first embodiment. [Figure 6] FIG. 2 is a rear view of the plug according to the first embodiment. [Figure 7] 2 is a perspective view showing the rear end portion of the plug with the housing removed according to the first embodiment. FIG. [Figure 8] 1 is an exploded perspective view showing the rear end portion of the plug according to embodiment 1 with the housing removed. FIG. [Figure 9] FIG. 2 is a plan view showing a plug according to a first modified example of the first embodiment. [Figure 10] FIG. 11 is a plan view showing a plug according to a second modification of the first embodiment. [Figure 11] FIG. 11 is a plan view showing a plug according to a third modification of the first embodiment. [Figure 12] FIG. 11 is a plan view showing a plug according to a third modification of the first embodiment. [Figure 13] FIG. 11 is a perspective view showing a plug according to a third modified example of the first embodiment. [Figure 14] FIG. 11 is a perspective view showing a plug according to a second embodiment. [Figure 15] FIG. 11 is a perspective view showing a plug according to a second embodiment. [Figure 16] FIG. 11 is a rear view of the plug according to the second embodiment. [Figure 17] FIG. 11 is a cross-sectional view showing a plug according to a second embodiment. [Figure 18] FIG. 11 is a rear view of the plug according to the second embodiment with the screws removed. [Figure 19] FIG. 11 is a perspective view showing a jack according to a third embodiment. [Figure 20] FIG. 11 is a perspective view showing a jack according to a third embodiment. [Figure 21] FIG. 11 is a rear view of the jack according to the third embodiment. [Figure 22] FIG. 11 is a schematic cross-sectional view showing a jack according to a third embodiment. [Diagram 23] FIG. 11 is a rear view of the jack with the screws removed according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote the same or equivalent parts, and this is common throughout the specification. For the convenience of explaining the embodiment, some of the drawings show arrows of three axes (X-axis, Y-axis, and Z-axis) that define directions, but these do not limit the directions.

[0010] Embodiment 1 In the first embodiment, the configuration of a plug 1, which is a type of connection device, will be described. The plug 1 is a phone plug for connecting, for example, an acoustic device such as a musical instrument, an effecter, and an audio interface to a cable 90. FIG. 1 is an external view showing the plug 1, a first cable 90a, and a second cable 90b according to the first embodiment. In the plug 1 according to the first embodiment, the direction of the X-axis arrow is the front, and the opposite direction to the X-axis arrow is the rear. The direction of the Y-axis arrow is the right, and the opposite direction to the Y-axis arrow is the left. The direction of the Z-axis arrow is the up, and the opposite direction to the Z-axis arrow is the down. As shown in FIG. 1, the first cable 90a and the second cable 90b are inserted into the plug 1. Since the first cable 90a and the second cable 90b have the same configuration, when the first cable 90a and the second cable 90b are not distinguished from each other, they are simply referred to as cables 90. The plug 1 has a first electrode 2, a second electrode 3, a third electrode 4, a first insulating portion 7 provided between the first electrode 2 and the second electrode 3, a second insulating portion 8 provided between the second electrode 3 and the third electrode 4, a housing 5 in which a first cable 90a and a second cable 90b are housed, and a cap 80 that covers a part of the housing 5. The first electrode 2, the second electrode 3, and the third electrode 4 are arranged side by side from the front to the rear in this order.

[0011] The first electrode 2, the second electrode 3, the third electrode 4, the housing 5 and the cap 80 are made of a conductive metal. The first insulating portion 7 and the second insulating portion 8 are made of a resin, for example. The plug 1 of the first embodiment is a phone plug (a so-called standard plug) in which the diameter of the second electrode 3 is 6.3 mm. Moreover, the plug 1 of the first embodiment is a solderless plug that can electrically connect the electrode and the cable 90 without soldering.

[0012] Fig. 2 is a schematic diagram showing the internal structure of a cable 90 attached to the plug 1 according to the first embodiment. As shown in Fig. 2, the cable 90 is a two-pole coaxial cable having a core wire 91 and a shield wire 93. The core wire 91 is configured by twisting together a plurality of thin single wires. The core wire 91 is covered with an insulator 92. A shield wire 93 is provided in a mesh shape around the outer periphery of the insulator 92. The shield wire 93 is covered with a protective coating 94. The core wire 91 and the shield wire 93 are made of, for example, copper. The insulator 92 is made of, for example, polyethylene. The protective coating 94 is made of, for example, vinyl.

[0013] FIG. 3 is a plan view showing the plug 1 according to the first embodiment. FIG. 4 is a perspective view showing the plug 1 according to the first embodiment. In the following figures, the cap 80 is omitted. As shown in FIGS. 3 and 4, the housing 5 of the plug 1 is formed with a first peep hole 11a and a second peep hole 11b, a first screw hole 12a and a second screw hole 12b, and a first storage section 22a and a second storage section 22b. The plug 1 also has a first screw 14a (corresponding to the first fixing means of the present invention) and a second screw 14b (corresponding to the second fixing means of the present invention), as well as a first connection pin 15a and a second connection pin 15b.

[0014] The first peephole 11a is an oval opening formed on the upper surface of the housing 5. The first peephole 11a is used to view the state inside the housing 5 when the first cable 90a is brought into contact with the first connection pin 15a. The second peephole 11b is an oval opening formed on the upper surface of the housing 5. The second peephole 11b is used to view the state inside the housing 5 when the second cable 90b is brought into contact with the second connection pin 15b. The first peephole 11a and the second peephole 11b are formed side by side in the left-right direction of the housing 5.

[0015] The first screw hole 12a is a hole for fastening the first screw 14a. The first screw hole 12a is formed rearward of the first peephole 11a. The second screw hole 12b is a hole for fastening the second screw 14b. The second screw hole 12b is formed rearward of the second peephole 11b. The first screw hole 12a and the second screw hole 12b are formed side by side in the left-right direction of the housing 5.

[0016] The first storage section 22a is formed inside the housing 5 and stores the first cable 90a. A first insertion opening 13a, which is an entrance for inserting the first cable 90a into the first storage section 22a, is formed on the rear surface of the housing 5 (one example of an end surface of the present invention). The first insertion opening 13a is circular. The second storage section 22b is formed inside the housing 5 separated from the first storage section 22a and stores the second cable 90b. A second insertion opening 13b, which is an entrance for inserting the second cable 90b into the second storage section 22b, is formed on the rear surface of the housing 5. The second insertion opening 13b is circular. The first storage section 22a and the second storage section 22b are arranged side by side in the left-right direction of the housing 5.

[0017] The first screw 14a is fastened into the first screw hole 12a to fix the first cable 90a stored in the housing 5. The first screw 14a is made of a conductive metal. The second screw 14b is fastened into the second screw hole 12b to fix the second cable 90b stored in the housing 5. The second screw 14b is made of a conductive metal.

[0018] The first connection pin 15a is provided in the first storage section 22a, and comes into contact with the core wire 91 of the first cable 90a when the first cable 90a is stored in the housing 5. The first connection pin 15a is made of a conductive metal. The second connection pin 15b is provided in the second storage section 22b, and comes into contact with the core wire 91 of the second cable 90b when the second cable 90b is stored in the housing 5. The second connection pin 15b is made of a conductive metal. The first connection pin 15a and the second connection pin 15b are arranged side by side in the left-right direction of the housing 5.

[0019] Fig. 5 is a cross-sectional schematic diagram showing the plug 1 according to the first embodiment. Fig. 5 shows the XY plane of the plug 1 at a position including the first connection pin 15a and the second connection pin 15b. Fig. 5 also shows the cable 90 in a state where it is connected to the plug 1. A cross-sectional structure of a part of the cable 90 that is housed in the housing 5 is shown. Furthermore, the dashed line A1 in Fig. 5 indicates the central axis of the plug 1.

[0020] As shown in FIG. 5, the first electrode 2 has a tip 61 located at the tip of the plug 1, and a cylindrical connection portion 62 that electrically connects the tip 61 to a first attachment portion 21a described later. The second electrode 3 has a cylindrical ring 63 located behind the tip 61, and a cylindrical connection portion 64 that electrically connects the ring 63 to a second connection pin 15b. The third electrode 4 corresponds to a sleeve in a phone plug, and is electrically connected to a cylindrical housing 5. In addition, the first connection pin 15a and the second connection pin 15b are both provided at positions off the central axis A1 of the plug 1. The first connection pin 15a and the second connection pin 15b face each other across the central axis A1 of the plug 1. The first connection pin 15a is disposed on the front side of the first storage portion 22a. The second connection pin 15b is disposed on the front side of the second storage portion 22b.

[0021] The plug 1 has a first mounting portion 21a and a second mounting portion 21b. The first mounting portion 21a is a member to which the first connection pin 15a is fixed. The first mounting portion 21a is made of a conductive metal and electrically connects the first connection pin 15a and the connection portion 62 of the first electrode 2. The second mounting portion 21b is a member through which the second connection pin 15b is inserted. The second mounting portion 21b is made of an insulating material such as resin, and is disposed between the second electrode 3 and the first mounting portion 21a. The second mounting portion 21b electrically insulates the second electrode 3 from the first mounting portion 21a. Details of the structures of the first mounting portion 21a and the second mounting portion 21b, and the method of fixing the first connection pin 15a and the second connection pin 15b will be described later with reference to another figure.

[0022] The core wire 91 of the first cable 90a stored in the first storage section 22a is in contact with the first connection pin 15a in such a manner that multiple twisted wires are entangled. As described above, the first connection pin 15a and the first electrode 2 are electrically connected by the first attachment section 21a. Therefore, the first electrode 2, the first attachment section 21a, the first connection pin 15a, and the core wire 91 of the first cable 90a are electrically connected.

[0023] In addition, the tip of the first screw 14a fastened to the housing 5 penetrates the protective coating 94 of the first cable 90a and contacts the shield wire 93 in an area B1 surrounded by a circular dashed line. However, in FIG. 5, the area B1 is illustrated larger for the sake of explanation. As described above, the third electrode 4 and the housing 5 are electrically connected. Therefore, the third electrode 4, the housing 5, the first screw 14a, and the shield wire 93 of the first cable 90a are electrically connected to each other.

[0024] The core wire 91 of the second cable 90b stored in the second storage section 22b is in contact with the second connection pin 15b such that multiple twisted wires are entangled. The second connection pin 15b is also electrically connected to the second electrode 3. Therefore, the second electrode 3, the second connection pin 15b, and the core wire 91 of the second cable 90b are electrically connected to each other.

[0025] Furthermore, the tip of the second screw 14b fastened to the housing 5 penetrates the protective coating 94 of the second cable 90b and contacts the shield wire 93 in an area B2 surrounded by a circular dashed line. However, in FIG. 5, the area B2 is illustrated larger for the sake of explanation. As described above, the third electrode 4 and the housing 5 are electrically connected. Therefore, the third electrode 4, the housing 5, the second screw 14b, and the shield wire 93 of the second cable 90b are electrically connected to each other.

[0026] The plug 1 has a first insulating portion 7 and a second insulating portion 8 exposed to the outside of the plug 1, as well as a plurality of insulating members 31 to 33 that are not exposed to the outside of the plug 1. The first insulating portion 7 is cylindrical and provided so as to contact the tip 61 and the connection portion 62 of the first electrode 2 and the ring 63 and the connection portion 64 of the second electrode 3, and electrically insulates the first electrode 2 from the second electrode 3. The second insulating portion 8 is cylindrical and provided so as to contact the ring 63 and the connection portion 64 of the second electrode 3 and the third electrode 4, and electrically insulates the second electrode 3 from the third electrode 4.

[0027] The insulating member 31 is cylindrical and is provided so as to be in contact with the connection portion 62 of the first electrode 2 and the connection portion 64 of the second electrode 3, thereby electrically insulating them. The insulating member 32 is cylindrical and is provided so as to be in contact with the connection portion 64 of the second electrode 3 and the third electrode 4, thereby electrically insulating them. The insulating member 33 is disk-shaped and is provided so as to be in contact with the first electrode 2, the first mounting portion 21a, the first connection pin 15a, and the second connection pin 15b, thereby electrically insulating the first electrode 2, the first mounting portion 21a, and the first connection pin 15a from the second connection pin 15b.

[0028] Here, a method of attaching the first cable 90a and the second cable 90b to the plug 1 will be described. First, the user inserts the first cable 90a forward from the first insertion opening 13a formed on the rear surface of the housing 5. The tip of the first cable 90a passes through the first storage section 22a and stops in contact with the insulating member 33. At that time, the core wire 91 wraps around and contacts the first connection pin 15a. As a result, the core wire 91 of the first cable 90a is electrically connected to the first connection pin 15a, and the core wire 91 of the first cable 90a and the first electrode 2 are electrically connected to each other.

[0029] Thereafter, the user mounts the first screw 14a in the first screw hole 12a and rotates the first screw 14a with a screwdriver to fasten the first screw 14a in the first screw hole 12a. At this time, the user pushes the first screw 14a in until the first screw 14a penetrates the protective coating 94 of the first cable 90a and reaches the shielded wire 93. As a result, the shielded wire 93 of the first cable 90a and the housing 5 are electrically connected via the first screw 14a, and the shielded wire 93 of the first cable 90a and the third electrode 4 are electrically connected.

[0030] Similarly, the user inserts the second cable 90b forward from the second insertion opening 13b formed on the rear surface of the housing 5. The tip of the second cable 90b passes through the second storage section 22b and stops in contact with the insulating member 33. At that time, the core wire 91 wraps around and contacts the second connection pin 15b. As a result, the core wire 91 of the second cable 90b is electrically connected to the second connection pin 15b, and the core wire 91 of the second cable 90b and the second electrode 3 are electrically connected to each other.

[0031] Thereafter, the user mounts the second screw 14b in the second screw hole 12b and rotates the second screw 14b with a screwdriver to fasten the second screw 14b in the second screw hole 12b. At this time, the user pushes the second screw 14b in until the second screw 14b penetrates the protective coating 94 of the second cable 90b and reaches the shielded wire 93. As a result, the shielded wire 93 of the second cable 90b and the housing 5 are electrically connected via the second screw 14b, and the shielded wire 93 of the second cable 90b and the third electrode 4 are electrically connected.

[0032] FIG. 6 is a rear view of the plug 1 according to the first embodiment. In FIG. 6, the point where the central axis A1 of the plug 1 passes through the rear surface of the plug 1 is indicated by C1. The center I1 of the first insertion opening 13a of the first storage section 22a and the center J1 of the second insertion opening 13b of the second storage section 22b are located on the circumference of a circle centered on C1. Therefore, by rotating the plug 1 around the central axis A1 passing through C1, the second storage section 22b can be moved to the position of the first storage section 22a before the rotation. Therefore, the workability of the first storage section 22a and the second storage section 22b, or the parts and the like arranged therein, is improved.

[0033] The structure of the first mounting portion 21a and the second mounting portion 21b, and the method of fixing the first connection pin 15a and the second connection pin 15b will be described in detail with reference to Figs. 7 and 8. Fig. 7 is a perspective view showing the rear end of the plug 1 in a state in which the housing 5 according to the first embodiment is removed. Fig. 8 is an exploded perspective view showing the rear end of the plug 1 in a state in which the housing 5 according to the first embodiment is removed. Fig. 8 is a drawing showing the state in which the parts shown in Fig. 7 are disassembled. However, in Fig. 8, the third electrode 4 and the insulating member 32 are not shown. As shown in Figs. 7 and 8, the first connection pin 15a has a rod-shaped rod portion 41a, a convex pin portion 42a provided at the tip of the rod portion 41a, and a fitting portion 43a provided at the base end of the rod portion 41a and having a diameter larger than that of the rod portion 41a. The second connection pin 15b has a rod-shaped rod portion 41b, a convex pin portion 42b provided at the tip of the rod portion 41b, and a fitting portion 43b provided at the base end of the rod portion 41b and having a diameter larger than that of the rod portion 41b.

[0034] The connection portion 64 of the second electrode 3 has a cylindrical portion 65 and an expanded diameter portion 66 connected to the rear portion of the cylindrical portion 65. The cylindrical portion 65 has a general cylindrical shape. The expanded diameter portion 66 has a general disk shape and has a larger diameter than the cylindrical portion 65. The expanded diameter portion 66 has a fitting hole 67b into which the fitting portion 43b of the second connection pin 15b is fitted. A through hole 51 is formed in the center of the connection portion 64 of the second electrode 3, penetrating the cylindrical portion 65 and the expanded diameter portion 66 in the front-rear direction.

[0035] The first mounting portion 21a has a base portion 23a and a shaft portion 24a connected to the front portion of the base portion 23a. The base portion 23a has an approximate shape of a disk. The outer shape of the rear surface of the base portion 23a is a shape corresponding to a part of a circle divided by a straight line. The side surfaces of the base portion 23a are parallel in the front-rear direction. The base portion 23a has a fitting hole 25a into which the fitting portion 43a of the first connection pin 15a is fitted. The fitting hole 25a of the base portion 23a is formed on the opposite side in the Y-axis direction to the fitting hole 67b formed in the enlarged diameter portion 66 of the second electrode 3, sandwiching the central axis A1 of the plug 1 therebetween. The shaft portion 24a has an approximate shape of a cylinder. The shaft portion 24a is inserted into a through hole 53 of the second mounting portion 21b, which will be described later. The first attachment portion 21a has a through hole 52 formed to penetrate the base portion 23a and the shaft portion 24a in the front-rear direction.

[0036] The second mounting portion 21b has an insertion portion 23b and a shaft portion 24b connected to the front portion of the insertion portion 23b. The insertion portion 23b has a general shape of a disk. A step shape is formed at the rear portion of the insertion portion 23b. Here, if the surface located at the lower step of the step shape is the low step surface 28b, and the surface of the base portion 23a of the first mounting portion 21a that contacts the low step surface 28b is the contact surface 28a, the outer shapes of the low step surface 28b and the contact surface 28a are the same. As described above, since the side surface of the base portion 23a is parallel to the front-rear direction, the low step surface 28b of the insertion portion 23b and the contact surface 28a of the base portion 23a also have the same outer shape as the rear surface of the base portion 23a. Also, the dimension of the step of the step shape formed in the insertion portion 23b (the distance between the rear surface of the insertion portion 23b and the lower step surface 28b) and the dimension (thickness) in the front-rear direction of the base portion 23a are approximately equal. Therefore, as shown in FIG. 7, in a state in which the first mounting portion 21a is attached to the second mounting portion 21b, the rear surface of the base portion 23a of the first mounting portion 21a and the rear surface of the insertion portion 23b of the second mounting portion 21b are formed as one circular surface without a step. Also, the side surface of the insertion portion 23b is parallel to the front-rear direction like the side surface of the base portion 23a. Therefore, as shown in FIG. 7, in a state in which the first mounting portion 21a is attached to the second mounting portion 21b, the side surface of the base portion 23a of the first mounting portion 21a and the side surface of the insertion portion 23b of the second mounting portion 21b are formed as a curved surface without a step. Therefore, when the first mounting portion 21a and the second mounting portion 21b are combined, the outer shape is configured into a disk shape without any chips.

[0037] The insertion portion 23b has an insertion hole 25b through which the shaft portion 24b of the second connection pin 15b is inserted. The insertion hole 25b of the insertion portion 23b is formed on the opposite side of the central axis A1 of the plug 1 to the fitting hole 25a formed in the base portion 23a of the first mounting portion 21a. The shaft portion 24b has a generally cylindrical shape. The shaft portion 24b is inserted into the through hole 51 of the second electrode 3. The second mounting portion 21b has a through hole 53 formed by penetrating the base portion 23a and the shaft portion 24b. The connection portion 62 of the first electrode 2 is inserted into the through holes 51, 52, and 53 and contacts the first mounting portion 21a.

[0038] Here, the procedure for fixing the first connection pin 15a and the second connection pin 15b will be described. First, the fitting portion 43b of the second connection pin 15b is fitted into the fitting hole 67b of the connection portion 64 of the second electrode 3. This fixes the second connection pin 15b to the second electrode 3. Next, the shaft portion 24b of the second mounting portion 21b is inserted into the through hole 51 of the second electrode 3, and the pin portion 42b and the rod portion 41b of the second connection pin 15b are inserted into the insertion hole 25b of the insertion portion 23b of the second mounting portion 21b. This fixes the second mounting portion 21b to the second electrode 3. Next, the shaft portion 24a of the first mounting portion 21a is inserted into the through hole 53 of the second mounting portion 21b. This fixes the first mounting portion 21a to the second mounting portion 21b. Finally, the fitting portion 43a of the first connection pin 15a is fitted into the fitting hole 25a of the first mounting portion 21a. As a result, the first connection pin 15a is fixed to the first mounting portion 21a. Here, as described above, the lower step surface 28b and the contact surface 28a have the same outer shape. Therefore, only one orientation is determined in which the first mounting portion 21a is attached to the second mounting portion 21b. Therefore, the fitting hole 25a formed in the first mounting portion 21a and the insertion hole 25b formed in the second mounting portion 21b can be accurately positioned. As a result, the first connection pin 15a fitted into the fitting hole 25a and the second connection pin 15b inserted into the insertion hole 25b can be accurately positioned.

[0039] As described above, the plug 1 of the first embodiment has the first connection pin 15a electrically connected to the first electrode 2 and the core wire 91 of the first cable 90a, and the second connection pin 15b electrically connected to the second electrode 3 and the core wire 91 of the second cable 90b. According to the plug 1 of the first embodiment, the first cable 90a and the second cable 90b that transmit signals corresponding to the three electrodes can be connected without soldering.

[0040] Furthermore, according to the first embodiment, a two-pole coaxial cable that has also been used in a conventional two-pole plug is connected as the cable 90. This allows the same type of cable to be used for both the two-pole plug and the three-pole plug 1 of the first embodiment, which is convenient.

[0041] (Variation 1) FIG. 9 is a plan view showing a plug 1A according to a first modification of the first embodiment. As shown in FIG. 9, the plug 1A is an L-shaped plug, and the housing 5A has a curved shape that is curved to the side. In FIG. 9, the region in which the first storage section 22a and the second storage section 22b are formed inside the housing 5A is shown by a broken line. The first insertion opening 13a and the second insertion opening 13b are formed on the right side surface (an example of an end surface of the present invention) of the housing 5A, not on the rear surface of the housing 5A. Even in the L-shaped plug 1A, by configuring it to have the first connection pin 15a and the second connection pin 15b, the first cable 90a and the second cable 90b that transmit signals corresponding to the three electrodes can be connected without soldering.

[0042] (Variation 2) FIG. 10 is a plan view showing a plug 1B according to a second modification of the first embodiment. In FIG. 10, the configuration corresponding to the plug 1 of the first embodiment is indicated by adding the suffix "B". As shown in FIG. 10, the plug 1B has a first electrode 2B, a second electrode 3B, a third electrode 4B, a first insulating portion 7B provided between the first electrode 2B and the second electrode 3B, a second insulating portion 8B provided between the second electrode 3B and the third electrode 4B, and a housing 5B in which a first cable 90a and a second cable 90b are housed. The plug 1B according to the second modification of the first embodiment is a phone plug (so-called a mini plug) in which the diameter of the second electrode 3B is 3.5 mm. The housing 5B of the plug 1B is formed with a first peephole 11aB and a second peephole 11bB, a first screw hole 12aB and a second screw hole 12bB, and a first storage section 22aB and a second storage section 22bB. In FIG. 10, the area in the housing 5B where the first storage section 22aB and the second storage section 22bB are formed is shown by a broken line. The plug 1B also has a first screw 14aB and a second screw 14bB, and a first connection pin 15aB and a second connection pin 15bB. The plug 1B of the second modification of the first embodiment is also configured to have the first connection pin 15aB and the second connection pin 15bB, so that the first cable 90a and the second cable 90b that transmit signals corresponding to the three electrodes can be connected without soldering.

[0043] (Variation 3) Fig. 11 is a plan view showing a plug 1C according to a third modification of the first embodiment. Fig. 12 is a plan view showing a plug 1C according to a third modification of the first embodiment. Fig. 12 is a view showing the plug in Fig. 11 from the opposite side. Fig. 13 is a perspective view showing a plug 1C according to a third modification of the first embodiment. As shown in Figures 11 to 13, the plug 1C has a first electrode 2C, a second electrode 3C, a third electrode 4C, a fourth electrode 101C, a fifth electrode 102C, a first insulating portion 7C provided between the first electrode 2C and the second electrode 3C, a second insulating portion 103C provided between the second electrode 3C and the fourth electrode 101C, a third insulating portion 104C provided between the fourth electrode 101C and the fifth electrode 102C, a fourth insulating portion 105C provided between the fifth electrode 102C and the third electrode 4C, and a housing 5C in which the first cable 90a, the second cable 90b, the third cable and the fourth cable (not shown) are housed. The first electrode 2C, the second electrode 3C, the fourth electrode 101C, the fifth electrode 102C, and the third electrode 4C are arranged side by side in this order from the front to the rear. The plug 1C is a five-pole plug in which the fourth electrode 101C and the fifth electrode 102C, which function as so-called rings, are added to the plug 1 described in the first embodiment. The third cable and the fourth cable each have a core wire 91 and a shield wire 93, similar to the first cable 90a and the second cable 90b. When the first cable 90a, the second cable 90b, the third cable, and the fourth cable are not distinguished from each other, they are also referred to as cables 90.

[0044] The materials of the first electrode 2C, the second electrode 3C, the third electrode 4C, the fourth electrode 101C, the fifth electrode 102C, and the housing 5C are conductive metals. The materials of the first insulating portion 7C, the second insulating portion 103C, the third insulating portion 104C, and the fourth insulating portion 105C are, for example, resin. The plug 1C of the third modification of the first embodiment is a five-pole phone plug with a diameter of the second electrode 3C of 4.4 mm. The plug 1C is attached to, for example, a headphone cable. The plug 1C of the third modification of the first embodiment is a solderless plug that can electrically connect the electrodes and the cable 90 without soldering.

[0045] The housing 5C of the plug 1C is formed with a first peephole 11aC, a second peephole 11bC, a third peephole 11cC, and a fourth peephole 11dC. The housing 5C of the plug 1C is formed with a first screw hole 12aC, a second screw hole 12bC, a third screw hole 12cC, and a fourth screw hole 12dC. The housing 5C of the plug 1C is formed with a first storage section 22aC, a second storage section 22bC, a third storage section 22cC, and a fourth storage section 22dC. In Figs. 11 and 12, the area in the housing 5C where the first storage section 22aC, the second storage section 22bC, the third storage section 22cC, and the fourth storage section 22dC are formed is indicated by a broken line. Furthermore, the plug 1C has a first screw 14aC, a second screw 14bC, a third screw 14cC, and a fourth screw 14dC. The plug 1C also has a first connection pin 15aC, a second connection pin 15bC, a third connection pin 15cC, and a fourth connection pin 15dC.

[0046] The first peephole 11aC is an oval opening formed on the upper surface of the housing 5C. The first peephole 11aC is used to view the state inside the housing 5C when the first cable 90a is brought into contact with the first connection pin 15aC. The second peephole 11bC is an oval opening formed on the upper surface of the housing 5C. The second peephole 11bC is used to view the state inside the housing 5C when the second cable 90b is brought into contact with the second connection pin 15bC. The third peephole 11cC is an oval opening formed on the upper surface of the housing 5C. The third peephole 11cC is used to view the state inside the housing 5C when the third cable is brought into contact with the third connection pin 15cC. The fourth peephole 11dC is an oval opening formed on the upper surface of the housing 5C. The fourth peephole 11dC is used to view the state inside the housing 5C when the fourth cable is brought into contact with the fourth connection pin 15dC. The first peephole 11aC and the second peephole 11bC are formed side by side in the left-right direction of the housing 5C. The third peephole 11cC and the fourth peephole 11dC are formed side by side in the left-right direction of the housing 5C. The first peephole 11aC and the second peephole 11bC, and the third peephole 11cC and the fourth peephole 11dC are formed facing each other in the up-down direction of the housing 5C.

[0047] The first screw hole 12aC is a hole for fastening the first screw 14aC. The first screw hole 12aC is formed rearward of the first peephole 11aC. The second screw hole 12bC is a hole for fastening the second screw 14bC. The second screw hole 12bC is formed rearward of the second peephole 11bC. The third screw hole 12cC is a hole for fastening the third screw 14cC. The third screw hole 12cC is formed rearward of the third peephole 11cC. The fourth screw hole 12dC is a hole for fastening the fourth screw 14dC. The fourth screw hole 12dC is formed rearward of the fourth peephole 11dC. The first screw hole 12aC and the second screw hole 12bC are formed side by side in the left-right direction of the housing 5C. The third screw hole 12cC and the fourth screw hole 12dC are formed side by side in the left-right direction of the housing 5C. The first screw hole 12aC and the second screw hole 12bC, and the third screw hole 12cC and the fourth screw hole 12dC are formed facing each other in the up-down direction of the housing 5C.

[0048] The first storage section 22aC is formed inside the housing 5C and stores the first cable 90a. A first insertion opening 13aC, which is an entrance when the first cable 90a is inserted into the first storage section 22aC, is formed on the rear surface of the housing 5C. The first insertion opening 13aC is circular. The second storage section 22bC is formed inside the housing 5C and stores the second cable 90b. A second insertion opening 13bC, which is an entrance when the second cable 90b is inserted into the second storage section 22bC, is formed on the rear surface of the housing 5C. The second insertion opening 13bC is circular. The third storage section 22cC is formed inside the housing 5C and stores the third cable. A third insertion opening 13cC, which is an entrance when the third cable is inserted into the third storage section 22cC, is formed on the rear surface of the housing 5C. The third insertion opening 13cC is circular. The fourth storage section 22dC is formed inside the housing 5C and stores the fourth cable. The fourth insertion opening 13dC, which is an entrance for inserting the fourth cable into the fourth storage section 22dC, is formed on the rear surface of the housing 5C. The fourth insertion opening 13dC is circular. The first storage section 22aC and the second storage section 22bC are arranged side by side in the left-right direction of the housing 5C. The first storage section 22aC, the second storage section 22bC, the third storage section 22cC, and the fourth storage section 22dC are partitioned from each other. The third storage section 22cC and the fourth storage section 22dC are arranged side by side in the left-right direction of the housing 5C. The first storage section 22aC and the second storage section 22bC, and the third storage section 22cC and the fourth storage section 22dC are provided facing each other in the up-down direction of the housing 5C.

[0049] The first screw 14aC is fastened into the first screw hole 12aC to fix the first cable 90a stored in the housing 5C. The first screw 14aC is made of a conductive metal. The second screw 14bC is fastened into the second screw hole 12bC to fix the second cable 90b stored in the housing 5C. The second screw 14bC is made of a conductive metal. The third screw 14cC is fastened into the third screw hole 12cC to fix the third cable stored in the housing 5C. The third screw 14cC is made of a conductive metal. The fourth screw 14dC is fastened into the fourth screw hole 12dC to fix the fourth cable stored in the housing 5C. The fourth screw 14dC is made of a conductive metal.

[0050] The first connection pin 15aC is provided in the first storage section 22aC, and contacts the core wire 91 of the first cable 90a when the first cable 90a is stored in the housing 5C. The first connection pin 15aC is made of a conductive metal. The second connection pin 15bC is provided in the second storage section 22bC, and contacts the core wire 91 of the second cable 90b when the second cable 90b is stored in the housing 5C. The second connection pin 15bC is made of a conductive metal. The third connection pin 15cC is provided in the third storage section 22cC, and contacts the core wire 91 of the third cable when the third cable is stored in the housing 5C. The third connection pin 15cC is made of a conductive metal. The fourth connection pin 15dC is provided in the fourth storage section 22dC, and contacts the core wire 91 of the fourth cable when the fourth cable is stored in the housing 5C. The fourth connection pin 15dC is made of a conductive metal. The first connection pin 15aC and the second connection pin 15bC are arranged side by side in the left-right direction of the housing 5C. The third connection pin 15cC and the fourth connection pin 15dC are arranged side by side in the left-right direction of the housing 5C. The first connection pin 15aC and the second connection pin 15bC, and the third connection pin 15cC and the fourth connection pin 15dC are arranged opposite to each other in the up-down direction of the housing 5C.

[0051] Although illustration of the internal structure of plug 1C of Modification 3 of Embodiment 1 is omitted, in plug 1C, the first electrode 2C, second electrode 3C, fourth electrode 101C, and fifth electrode 102C are connected to core wires 91 of each cable 90 in the same manner as in Embodiment 1. In addition, the third electrode 4C is connected to shield wires 93 of each cable 90.

[0052] Specifically, the core wire 91 of the first cable 90a stored in the first storage section 22aC is in contact with the first connection pin 15aC in such a manner that multiple twisted wires are entangled. The first connection pin 15aC and the first electrode 2C are electrically connected. Therefore, the first electrode 2C, the first connection pin 15aC, and the core wire 91 of the first cable 90a are electrically connected.

[0053] The tip of the first screw 14aC fastened to the housing 5C penetrates the protective coating 94 of the first cable 90a and contacts the shield wire 93. The third electrode 4C and the housing 5C are electrically connected. Therefore, the third electrode 4C, the housing 5C, the first screw 14aC, and the shield wire 93 of the first cable 90a are electrically connected to each other.

[0054] The core wire 91 of the second cable 90b stored in the second storage section 22bC is in contact with the second connection pin 15bC in such a manner that multiple twisted wires are entangled. The second connection pin 15bC and the second electrode 3C are electrically connected. Therefore, the second electrode 3C, the second connection pin 15bC, and the core wire 91 of the second cable 90b are electrically connected.

[0055] The tip of the second screw 14bC fastened to the housing 5C penetrates the protective coating 94 of the second cable 90b and contacts the shield wire 93. The third electrode 4C and the housing 5C are electrically connected. Therefore, the third electrode 4C, the housing 5C, the second screw 14bC, and the shield wire 93 of the second cable 90b are electrically connected to each other.

[0056] The core wire 91 of the third cable stored in the third storage section 22cC is in contact with the third connection pin 15cC in such a manner that multiple twisted wires are entangled. The third connection pin 15cC and the fourth electrode 101C are electrically connected. Therefore, the fourth electrode 101C, the third connection pin 15cC, and the core wire 91 of the third cable are electrically connected.

[0057] The tip of the third screw 14cC fastened to the housing 5C penetrates the protective coating 94 of the third cable and contacts the shield wire 93. The third electrode 4C and the housing 5C are electrically connected. Therefore, the third electrode 4C, the housing 5C, the third screw 14cC, and the shield wire 93 of the third cable are electrically connected to each other.

[0058] The core wire 91 of the fourth cable stored in the fourth storage section 22dC is in contact with the fourth connection pin 15dC in such a manner that multiple twisted wires are entangled. The fourth connection pin 15dC and the fifth electrode 102C are electrically connected. Therefore, the fifth electrode 102C, the fourth connection pin 15dC, and the core wire 91 of the fourth cable are electrically connected.

[0059] The tip of the fourth screw 14dC fastened to the housing 5C penetrates the protective coating 94 of the fourth cable and contacts the shield wire 93. The third electrode 4C and the housing 5C are electrically connected. Therefore, the third electrode 4C, the housing 5C, the fourth screw 14dC, and the shield wire 93 of the fourth cable are electrically connected to each other.

[0060] According to plug 1C of variant example 3 of embodiment 1, by having a configuration including first connection pin 15aC, second connection pin 15bC, third connection pin 15cC, and fourth connection pin 15dC, it is possible to connect first cable 90a, second cable 90b, third cable, and fourth cable which transmit signals corresponding to five electrodes without soldering.

[0061] Embodiment 2 In the second embodiment, a configuration of a plug 1D, which is a type of connection device, will be described. The plug 1D is an XLR plug for connecting an XLR jack and a cable 90. In the following, the description of the parts common to the first embodiment will be omitted as appropriate, and the differences will be mainly described.

[0062] FIG. 14 is a perspective view showing a plug 1D according to the second embodiment. FIG. 15 is a perspective view showing a plug 1D according to the second embodiment. In the plug 1D according to the second embodiment, the X-axis arrow direction is the front, and the opposite direction of the X-axis arrow direction is the rear. The Y-axis arrow direction is the right, and the opposite direction of the Y-axis arrow direction is the left. The Z-axis arrow direction is the up, and the opposite direction of the Z-axis arrow direction is the down. As shown in FIG. 14 and FIG. 15, the plug 1D has a housing 5D in which the first electrode 2D, the second electrode 3D, the third electrode 4D, the first cable 90a, and the second cable 90b are housed, and a frame 6D in which the first electrode 2D, the second electrode 3D, and the third electrode 4D are housed. However, in each figure of the second embodiment, the cable is omitted from the illustration. The plug 1D according to the second embodiment is a solderless plug that can electrically connect the electrode and the cable 90 without soldering.

[0063] The materials of the first electrode 2D, the second electrode 3D, the third electrode 4D, the housing 5D, and the frame 6D are conductive metals. For example, the first electrode 2D is a pin (pin 2 for hot) for transmitting a positive phase signal. The second electrode 3D is a pin (pin 3 for cold) for transmitting a negative phase signal. The third electrode 4D is a pin (pin 1 for ground) for transmitting a signal indicating a reference voltage.

[0064] A first screw hole 12aD, a second screw hole 12bD, a first storage portion 22aD, and a second storage portion 22bD are formed in a housing 5D of the plug 1D. The plug 1D also has a first screw 14aD and a second screw 14bD.

[0065] The first screw hole 12aD is a hole for fastening the first screw 14aD. The first screw hole 12aD is formed in the bottom surface of the housing 5D. The second screw hole 12bD is a hole for fastening the second screw 14bD. The second screw hole 12bD is formed in the left surface different from the bottom surface where the first screw hole 12aD is formed.

[0066] The first storage section 22aD is formed inside the housing 5D, and the first cable 90a is stored therein. A first insertion opening 13aD, which is an entrance for inserting the first cable 90a into the first storage section 22aD, is formed on the rear surface of the housing 5D. The first insertion opening 13aD is circular. The second storage section 22bD is formed inside the housing 5D, and the second cable 90b is stored therein. A second insertion opening 13bD, which is an entrance for inserting the second cable 90b into the second storage section 22bD, is formed on the rear surface of the housing 5D. The second insertion opening 13bD is circular.

[0067] The first screw 14aD is fastened into the first screw hole 12aD to fix the first cable 90a stored in the housing 5D. The first screw 14aD is made of a conductive metal. The second screw 14bD is fastened into the second screw hole 12bD to fix the second cable 90b stored in the housing 5D. The second screw 14bD is made of a conductive metal.

[0068] FIG. 16 is a rear view of the plug 1D according to the second embodiment. However, in FIG. 16, the first screw 14aD and the second screw 14bD are omitted. As shown in FIG. 16, the plug 1D has a first connection pin 15aD and a second connection pin 15bD. The first connection pin 15aD is disposed on the front side of the first storage section 22aD. When the first cable 90a is stored in the housing 5D, the first connection pin 15aD comes into contact with the core wire 91 of the first cable 90a. The first connection pin 15aD is made of a conductive metal. The second connection pin 15bD is disposed on the front side of the second storage section 22bD. When the second cable 90b is stored in the housing 5D, the second connection pin 15bD comes into contact with the core wire 91 of the second cable 90b. The second connection pin 15bD is made of a conductive metal.

[0069] FIG. 17 is a schematic cross-sectional view showing a plug 1D according to the second embodiment. FIG. 17 shows an XY plane at a position including the first electrode 2D and the third electrode 4D in the plug 1D. Also, a dashed line A2 shows the central axis of the plug 1D. As shown in FIG. 17, the plug 1D has a conductive pin 71. The conductive pin 71 is provided at a position off the central axis A2 of the plug 1D. The conductive pin 71 is made of a conductive metal and electrically connects the housing 5D and the third electrode 4D. Also, a first connection pin 15aD is provided at a position off the central axis A2 of the plug 1D. The first connection pin 15aD is electrically connected to the first electrode 2D. Furthermore, although not shown, a second connection pin 15bD is also provided at a position off the central axis A2 of the plug 1D and is electrically connected to the second electrode 3D like the first connection pin 15aD.

[0070] Although the cable is not shown, the first cable 90a stored in the first storage section 22aD is in contact with the first connection pin 15aD so that a plurality of twisted wires are entangled. As described above, the first connection pin 15aD and the first electrode 2D are electrically connected. Therefore, the first electrode 2D, the first connection pin 15aD, and the core wire 91 of the first cable 90a are electrically connected. In addition, the tip of the first screw 14aD fastened to the housing 5D penetrates the protective coating 94 of the first cable 90a and contacts the shield wire 93. As described above, the third electrode 4D and the housing 5D are electrically connected by the conductive pin 71. Therefore, the third electrode 4D, the conductive pin 71, the housing 5D, the first screw 14aD, and the shield wire 93 of the first cable 90a are electrically connected.

[0071] Although not shown, the second cable 90b is electrically connected to the second electrode 3D and the third electrode 4D in the same manner as the first cable 90a. That is, the first electrode 2D, the second connection pin 15bD, and the core wire 91 of the second cable 90b are electrically connected. Also, the third electrode 4D, the conductive pin 71, the housing 5D, the second screw 14bD, and the shield wire 93 of the second cable 90b are electrically connected.

[0072] The plug 1D has insulating members 34 and 35 made of, for example, resin. The insulating member 34 is provided so as to be in contact with the first electrode 2D, the second electrode 3D, and the third electrode 4D, and electrically insulates them. The insulating member 35 is provided so as to be in contact with the first connection pin 15aD, the second connection pin 15bD, and the conduction pin 71, and electrically insulates them.

[0073] FIG. 18 is a rear view of the plug 1D without the screws according to the second embodiment. In FIG. 18, C2 indicates a point where the central axis A2 of the plug 1D passes through the rear surface of the plug 1D. The center I2 of the first insertion opening 13aD of the first storage section 22aD and the center J2 of the second insertion opening 13bD of the second storage section 22bD are located on the circumference of a circle centered on D2. Therefore, by rotating the plug 1D around the central axis A2 passing through D2, the second storage section 22bD can be moved to the position of the first storage section 22aD before the rotation. Therefore, the workability of the first storage section 22aD and the second storage section 22bD, or the parts and the like arranged therein, is improved.

[0074] As described above, the plug 1D of the second embodiment has the first electrode 2D, the first connection pin 15aD electrically connected to the core wire 91 of the first cable 90a, and the second electrode 3D, and the second connection pin 15bD electrically connected to the core wire 91 of the second cable 90b. Therefore, even in an XLR plug, the first cable 90a and the second cable 90b that transmit signals corresponding to the three electrodes can be connected without soldering.

[0075] Embodiment 3 In the third embodiment, a configuration of a jack 1E, which is a type of connection device, will be described. The jack 1E is an XLR jack for connecting an XLR plug and a cable 90. In the following, the description of the parts common to the first embodiment will be omitted as appropriate, and the differences will be mainly described.

[0076] FIG. 19 is a perspective view showing a jack 1E according to the third embodiment. FIG. 20 is a perspective view showing a jack 1E according to the third embodiment. In the jack 1E, 1C, the direction opposite to the X-axis arrow direction is the front, and the X-axis arrow direction is the rear. Also, the direction opposite to the Y-axis arrow direction is the right, and the Y-axis arrow direction is the left. And, the Z-axis arrow direction is the up, and the direction opposite to the Z-axis arrow direction is the down. As shown in FIG. 19 and FIG. 20, the jack 1E has a housing 5E in which the first electrode 2E, the second electrode 3E, the third electrode 4E, the first cable 90a, and the second cable 90b are stored, and a frame 6E in which the first electrode 2E, the second electrode 3E, and the third electrode 4E are stored. However, in each figure of the third embodiment, the illustration of the cable is omitted. The jack 1E of the third embodiment is a solderless jack that can electrically connect the electrode and the cable 90 without soldering.

[0077] The first electrode 2E, the second electrode 3E, the third electrode 4E, the housing 5E, and the frame 6E are made of a conductive metal. For example, the first electrode 2E is a receptacle into which a pin (pin 2 for hot) for transmitting a positive-phase signal is inserted. The second electrode 3E is a receptacle into which a pin (pin 3 for cold) for transmitting a negative-phase signal is inserted. The third electrode 4E is a receptacle into which a pin (pin 1 for ground) for transmitting a signal indicating a reference voltage is inserted.

[0078] A first screw hole 12aE and a second screw hole (not shown), as well as a first storage portion 22aE and a second storage portion 22bE, are formed in a housing 5E of the jack 1E. The jack 1E also has a first screw 14aE and a second screw 14bE.

[0079] The first screw hole 12aE is a hole for fastening the first screw 14aE. The first screw hole 12aE is formed in the bottom surface of the housing 5E. The second screw hole is a hole for fastening the second screw 14bE. The second screw hole is formed in the right surface different from the bottom surface where the first screw hole 12aE is formed.

[0080] The first storage section 22aE is formed inside the housing 5E, and the first cable 90a is stored therein. A first insertion opening 13aE, which is an entrance for inserting the first cable 90a into the first storage section 22aE, is formed on the rear surface of the housing 5E. The first insertion opening 13aE is circular. The second storage section 22bE is formed inside the housing 5E, and the second cable 90b is stored therein. A second insertion opening 13bE, which is an entrance for inserting the second cable 90b into the second storage section 22bE, is formed on the rear surface of the housing 5E. The second insertion opening 13bE is circular.

[0081] The first screw 14aE fixes the first cable 90a housed in the housing 5E by tightening the first screw hole 12aE. The first screw 14aE is made of a conductive metal. The second screw 14bE fixes the second cable 90b housed in the housing 5E by tightening the second screw hole 12bE. The second screw 14bE is made of a conductive metal.

[0082] FIG. 21 is a rear view of a jack 1E according to the third embodiment. However, in FIG. 21, the first screw 14aE and the second screw 14bE are omitted. As shown in FIG. 21, the jack 1E has a first connection pin 15aE and a second connection pin 15bE. The first connection pin 15aE is disposed on the front side of the first storage section 22aE. When the first cable 90a is stored in the housing 5E, the first connection pin 15aE comes into contact with the core wire 91 of the first cable 90a. The first connection pin 15aE is made of a conductive metal. The second connection pin 15bE is disposed on the front side of the second storage section 22bE. When the second cable 90b is stored in the housing 5E, the second connection pin 15bE comes into contact with the core wire 91 of the second cable 90b. The second connection pin 15bE is made of a conductive metal.

[0083] FIG. 22 is a schematic cross-sectional view showing a jack 1E according to the third embodiment. FIG. 22 shows an XY plane at a position including the first electrode 2E and the third electrode 4E in the jack 1E. In addition, a dashed line A3 indicates the central axis of the jack 1E. As shown in FIG. 22, the jack 1E has a conductive pin 72. The conductive pin 72 is provided at a position off the central axis A3 of the jack 1E. The conductive pin 72 is made of a conductive metal and electrically connects the housing 5E and the third electrode 4E. In addition, the first connection pin 15aE is provided at a position off the central axis A3 of the jack 1E. The first connection pin 15aE is electrically connected to the first electrode 2E. Furthermore, although not shown, the second connection pin 15bE is also provided at a position off the central axis A3 of the jack 1E and is electrically connected to the second electrode 3E like the first connection pin 15aE.

[0084] Although the cable is not shown, the first cable 90a stored in the first storage section 22aE is in contact with the first connection pin 15aE so that a plurality of twisted wires are entangled. As described above, the first connection pin 15aE and the first electrode 2E are electrically connected. Therefore, the first electrode 2E, the first connection pin 15aE, and the core wire 91 of the first cable 90a are electrically connected. In addition, the tip of the first screw 14aE fastened to the housing 5E penetrates the protective coating 94 of the first cable 90a and contacts the shield wire 93. As described above, the third electrode 4E and the housing 5E are electrically connected by the conductive pin 71. Therefore, the third electrode 4E, the conductive pin 71, the housing 5E, the first screw 14aE, and the shield wire 93 of the first cable 90a are electrically connected.

[0085] Although not shown in the drawings, the second cable 90b is electrically connected to the second electrode 3E and the third electrode 4E in the same manner as the first cable 90a. That is, the first electrode 2E, the second connection pin 15bE, and the core wire 91 of the second cable 90b are electrically connected. Also, the third electrode 4E, the conductive pin 72, the housing 5E, the second screw 14bE, and the shield wire 93 of the second cable 90b are electrically connected.

[0086] The jack 1E has insulating members 36 and 37 made of, for example, resin. The insulating member 36 is provided so as to be in contact with the first electrode 2E, the second electrode 3E, and the third electrode 4E, and electrically insulates them. The insulating member 37 is provided so as to be in contact with the first connection pin 15aE, the second connection pin 15bE, and the conductive pin 72, and electrically insulates them.

[0087] FIG. 23 is a rear view of the jack 1E without the screws according to the third embodiment. In FIG. 23, C3 indicates a point where the central axis A3 of the jack 1E passes through the rear surface of the jack 1E. The center I3 of the first insertion opening 13aE of the first storage section 22aE and the center J3 of the second insertion opening 13bE of the second storage section 22bE are located on the circumference of a circle centered on C3. Therefore, by rotating the plug 1 around the central axis A3 passing through C3, the second storage section 22bE can be moved to the position of the first storage section 22aE before the rotation. Therefore, the workability of the first storage section 22aE and the second storage section 22bE, or the parts and the like arranged therein, is improved.

[0088] As described in the second embodiment, the center I2 of the insertion opening of the first storage section 22aC and the center J2 of the insertion opening of the second storage section 22bC for the XLR plug are also located on the circumference of a circle centered on C2. Therefore, when the XLR plug of the second embodiment and the XLR jack of the third embodiment are arranged so that their electrodes face in the same direction, the housing 5C of the second embodiment and the housing 5E of the third embodiment differ only in their orientation. Therefore, the housing 5C of the second embodiment and the housing 5E of the third embodiment can be used interchangeably, which is convenient.

[0089] As described above, the jack 1E of the third embodiment has the first electrode 2E, the first connection pin 15aE electrically connected to the core wire 91 of the first cable 90a, and the second electrode 3E, and the second connection pin 15bE electrically connected to the core wire 91 of the second cable 90b. Therefore, even in an XLR jack, the first cable 90a and the second cable 90b that transmit signals corresponding to the three electrodes can be connected without soldering.

[0090] The above is a description of the embodiment and the modified examples of the present invention, but the present invention is not limited to the configurations of the above embodiment and modified examples, and various modifications are possible within the scope of the technical concept. For example, although the connection device (phone plug) of the first embodiment or its modified examples has three or five electrodes, the connection device may have four electrodes. Furthermore, although the connection device (XLR plug and XLR jack) of the second and third embodiments has three electrodes, the connection device may have four or five electrodes. In any case, the connection device may be provided with connection pins for connecting cables in the same number as the number of two-pole cables to be connected.

[0091] The cable connected to the connection device may be a coaxial parallel cable formed by integrating a first cable having a first core wire and a first shield wire with a second cable having a second core wire and a second shield wire. In this case, the first shield wire and the second shield wire may be the same, and the first insertion port and the second insertion port may be formed integrally.

[0092] In the embodiment, the fixing means for fixing the cable 90 is a screw. However, the fixing means may be in another form. For example, the fixing means may be a leaf spring or the like that presses the cable 90 against the housing. In this case, the shield wire 93 of the cable 90 may be twisted and entangled with a conductor electrically connected between the cable 90 and the housing, thereby electrically connecting the cable 90 to the first electrode or the second electrode. This conductor may be the leaf spring described above, or may be something other than a leaf spring. Note that, as long as the shield wire 93 of either the first cable 90a or the second cable 90b is electrically connected to the housing, the other cable 90 may simply be fixed to the housing by a fixing means. [Explanation of symbols]

[0093] 1 plug, 1A plug, 1B plug, 1C plug, 1D plug, 1E jack, 2 first electrode, 2C first electrode, 2D first electrode, 2E first electrode, 3 second electrode, 3C second electrode, 3D second electrode, 3E second electrode, 4 third electrode, 4C third electrode, 4D third electrode, 4E third electrode, 5 housing, 5A housing, 5B housing, 5C housing, 5D housing, 5E housing, 6D frame, 6E frame, 7 first insulating part, 7C first insulating part, 8 second insulating part, 11a first peephole, 11aB first peephole, 11aC first peephole, 11b second peephole, 11bB second peephole, 11bC second peephole, 11cC 3rd peephole, 11dC 4th peephole, 12a 1st screw hole, 12aB 1st screw hole, 12aC 1st screw hole, 12aD 1st screw hole, 12aE 1st screw hole, 12b 2nd screw hole, 12bB 2nd screw hole, 12bC 2nd screw hole, 12bD 2nd screw hole, 12cC 3rd screw hole, 12dC 4th screw hole, 13a 1st insertion hole, 13aC 1st insertion hole, 13aD 1st insertion hole, 13aE 1st insertion hole, 13b 2nd insertion hole, 13bC 2nd insertion hole, 13bD 2nd insertion hole, 13bE 2nd insertion hole, 13cC 3rd insertion hole, 13dC 4th insertion hole, 14a 1st screw, 14aB 1st screw, 14aC First screw, 14aD First screw, 14aE First screw, 14b Second screw, 14bB Second screw, 14bD Second screw, 14bC Second screw, 14bE Second screw, 14cC Third screw, 14dC Fourth screw, 15a First connection pin, 15aB First connection pin, 15aC First connection pin, 15aD First connection pin, 15aE First connection pin, 15b Second connection pin, 15bB Second connection pin, 15bC Second connection pin, 15bD Second connection pin, 15bE Second connection pin, 15cC Third connection pin, 15dC Fourth connection pin, 21a First mounting portion, 21b Second mounting portion, 22a First storage portion, 22aB First storage portion, 22aC First storage portion, 22aD First storage section, 22aE First storage section, 22b Second storage section, 22bB Second storage section, 22bC Second storage section, 22bDSecond storage section, 22bE Second storage section, 22cC Third storage section, 22dC Fourth storage section, 23a Base section, 23b Insertion section, 24a Shaft section, 24b Shaft section, 25a Fitting hole, 25b Insertion hole, 28a Contact surface, 28b Lower surface, 31 Insulating member, 32 Insulating member, 33 Insulating member, 34 Insulating member, 35 Insulating member, 36 Insulating member, 37 Insulating member, 41a Rod section, 41b Rod section, 42a Pin section, 42b Pin section, 43a Fitting section, 43b Fitting section, 51 Through hole, 52 Through hole, 53 Through hole, 61 Tip, 62 Connection section, 63 Ring, 64 Connection section, 65 Cylindrical section, 66 Enlarged diameter section, 67b Fitting hole, 71 Conductive pin, 72 conductive pin, 80 cap, 90 cable, 90a first cable, 90b second cable, 91 core wire, 92 insulator, 93 shield wire, 94 protective coating, 101C fourth electrode, 102C fifth electrode, 103C second insulating portion, 104C third insulating portion, 105C fourth insulating portion.

Claims

1. A connection device for connecting a first cable having a first core wire and a first shield wire to a second cable having a second core wire and a second shield wire without soldering, the connection device being a phone plug; a first electrode including a tip, a second electrode including a ring, and a third electrode that is a sleeve; a first connection pin electrically connected to the first electrode and the first core wire; a second connection pin electrically connected to the second electrode and the second core wire; a housing that houses the first cable and the second cable and is electrically connected to the third electrode and at least one of the first shielded wire and the second shielded wire; a first attachment portion connected to the first electrode and to which the first connection pin is attached; a second attachment portion into which the second connection pin is inserted; The second mounting portion has insulating properties and is disposed between the second electrode and the first mounting portion. Connection device.

2. A connection device for connecting a first cable having a first core wire and a first shield wire to a second cable having a second core wire and a second shield wire without soldering, the connection device being an XLR plug; a first electrode which is a pin for transmitting a positive phase signal, a second electrode which is a pin for transmitting a negative phase signal, and a third electrode which is a pin for transmitting a signal indicating a reference voltage; a first connection pin electrically connected to the first electrode and the first core wire; a second connection pin electrically connected to the second electrode and the second core wire; a housing that houses the first cable and the second cable and is electrically connected to the third electrode and at least one of the first shielded wire and the second shielded wire; a first fixing means which is a screw for fixing the first cable to the housing and electrically connecting the first shielded wire and the housing; a second fixing means which is a screw for fixing the second cable to the housing and electrically connecting the second shielded wire and the housing, The housing includes: a sector-shaped end surface including a first straight portion, a second straight portion extending in a direction different from the first straight portion, and a curved portion connecting the first straight portion and the second straight portion; a first plane that shares the end surface and the first linear portion; a second plane that shares the second linear portion with the end surface; a curved surface that shares the end surface and the curved portion; The first fastening means is attached to the first plane; The second fastening means is attached to the second plane. Connection device.

3. A connection device for connecting a first cable having a first core wire and a first shield wire to a second cable having a second core wire and a second shield wire without soldering, the connection device being an XLR jack; a first electrode which is a receiving portion into which a pin for transmitting a positive phase signal is inserted, a second electrode which is a receiving portion into which a pin for transmitting a negative phase signal is inserted, and a third electrode which is a receiving portion into which a pin for transmitting a signal indicating a reference voltage is inserted; a first connection pin electrically connected to the first electrode and the first core wire; a second connection pin electrically connected to the second electrode and the second core wire; a housing that houses the first cable and the second cable and is electrically connected to the third electrode and at least one of the first shielded wire and the second shielded wire; a first fixing means which is a screw for fixing the first cable to the housing and electrically connecting the first shielded wire and the housing; a second fixing means which is a screw for fixing the second cable to the housing and electrically connecting the second shielded wire and the housing, The housing includes: a sector-shaped end surface including a first straight portion, a second straight portion extending in a direction different from the first straight portion, and a curved portion connecting the first straight portion and the second straight portion; a first plane that shares the end surface and the first linear portion; a second plane that shares the second linear portion with the end surface; a curved surface that shares the end surface and the curved portion; The first fastening means is attached to the first plane; The second fastening means is attached to the second plane. Connection device.

4. The housing includes: a first storage section that stores the first cable; a second storage section that is partitioned from the first storage section and that stores the second cable. A connection device according to any one of claims 1 to 3.

5. The housing comprises: a first storage section that stores the first cable; a second storage section that is partitioned from the first storage section and that stores the second cable; An insertion opening for the first storage portion and an insertion opening for the second storage portion are formed on an end surface of the housing, The center of the insertion opening of the first storage section and the center of the insertion opening of the second storage section are located on the circumference of a circle whose center is a point where a central axis of the connection device passes through the end face. The connection device according to claim 1 .

6. a first fixing means for fixing the first cable to the housing and electrically connecting the first shielded wire and the housing; and a second fixing means for fixing the second cable to the housing and electrically connecting the second shielded wire and the housing. The connection device according to claim 1 .

7. The first fixing means and the second fixing means are screws. The connection device according to claim 6.

8. The first connection pin and the second connection pin are provided at positions facing each other across a central axis of the connection device. The connection device according to claim 1 .

9. A step shape is formed at the rear portion of the second mounting portion, A lower step surface located at a lower step of the step shape and a surface of the first mounting portion that comes into contact with the lower step surface have the same outer shape. The connection device according to claim 1 .

10. The connection device in which a third cable having a third core wire and a third shield wire and a fourth cable having a fourth core wire and a fourth shield wire are connected without soldering, A fourth electrode and a fifth electrode; a third connection pin electrically connected to the fourth electrode and the third core wire; a fourth connection pin electrically connected to the fifth electrode and the fourth core wire, The housing houses the first cable, the second cable, the third cable, and the fourth cable, and is electrically connected to the third electrode and at least one of the first shielded wire, the second shielded wire, the third shielded wire, and the fourth shielded wire. The connection device according to claim 1 .

11. The housing comprises: a first storage section that stores the first cable; a second storage section that is partitioned from the first storage section and that stores the second cable; An insertion opening for the first storage portion and an insertion opening for the second storage portion are formed on the end surface of the housing, The center of the insertion opening of the first storage section and the center of the insertion opening of the second storage section are located on the circumference of a circle whose center is a point where a central axis of the connection device passes through the end face.

4. A connection device according to claim 2 or 3.

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