Connection device

Abstract

In a connection device having three electrodes, a cable is connected that transmits signals corresponding to the three electrodes without soldering. [Solution] A connecting device for connecting 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 without soldering, comprising: a first electrode, a second electrode, and a third electrode; a first connecting pin electrically connected to the first electrode and the first core wire; a second connecting 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 in which a cable is connected without soldering.

Background Art

[0002] Conventionally, a two-pole plug having two electrodes and to which a cable having a core wire and a shield wire is connected, and which does not require soldering for connecting the cable, is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] [[ID=3�]]There is an increasing demand for three-pole plugs or three-pole jacks having three electrodes and used for transmitting stereo signals or balance signals. However, conventionally, in three-pole plugs or three-pole jacks, technologies for connecting a cable that transmits signals corresponding to three electrodes without soldering have not been sufficiently studied.

[0005] The present invention has been made to solve the above problems, and an object thereof is to connect a cable that transmits signals corresponding to three electrodes without soldering in a connection device having three electrodes.

Means for Solving the Problems

[0006] The connecting device according to the present invention is a connecting device that connects 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 without soldering, and comprises a first electrode, a second electrode, and a third electrode, a first connecting pin electrically connected to the first electrode and the first core wire, a second connecting 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. [Effects of the Invention]

[0007] The connecting device of the present invention has a first connecting pin that is electrically connected to a first electrode and the core wire of a first cable, and a second connecting pin that is electrically connected to a second electrode and the core wire of a second cable. Therefore, according to the connecting device of the present invention, it is possible to connect a cable that transmits signals corresponding to three electrodes. [Brief explanation of the drawing]

[0008] [Figure 1] This is an external view showing the plug, the first cable, and the second cable according to Embodiment 1. [Figure 2] This is a schematic diagram showing the internal structure of the cable attached to the plug according to Embodiment 1. [Figure 3] This is a plan view showing a plug according to Embodiment 1. [Figure 4] This is a perspective view showing a plug according to Embodiment 1. [Figure 5] This is a schematic cross-sectional view showing a plug according to Embodiment 1. [Figure 6] This is a rear view of the plug according to Embodiment 1. [Figure 7] This is a perspective view showing the rear end of the plug with the housing removed, according to Embodiment 1. [Figure 8] This is an exploded perspective view showing the rear end of the plug with the housing removed, according to Embodiment 1. [Figure 9] It is a plan view showing a plug according to Modified Example 1 of Embodiment 1. [Figure 10] It is a plan view showing a plug according to Modified Example 2 of Embodiment 1. [Figure 11] It is a plan view showing a plug according to Modified Example 3 of Embodiment 1. [Figure 12] It is a plan view showing a plug according to Modified Example 3 of Embodiment 1. [Figure 13] It is a perspective view showing a plug according to Modified Example 3 of Embodiment 1. [Figure 14] It is a perspective view showing a plug according to Embodiment 2. [Figure 15] It is a perspective view showing a plug according to Embodiment 2. [Figure 16] It is a rear view of a plug according to Embodiment 2. [Figure 17] It is a schematic cross-sectional view showing a plug according to Embodiment 2. [Figure 18] It is a rear view of a plug in a state where the screws according to Embodiment 2 are removed. [Figure 19] It is a perspective view showing a jack according to Embodiment 3. [Figure 20] It is a perspective view showing a jack according to Embodiment 3. [Figure 21] It is a rear view of a jack according to Embodiment 3. [Figure 22] It is a schematic cross-sectional view showing a jack according to Embodiment 3. [Figure 23] It is a rear view of a jack in a state where the screws according to Embodiment 3 are removed.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, those denoted by the same reference numerals are the same or corresponding ones, which is common throughout the entire specification. For the convenience of explaining the embodiments, arrows of three axes (X-axis, Y-axis, and Z-axis) defining directions are shown in a part of the drawings, but the directions are not limited.

[0010] Embodiment 1. In Embodiment 1, the configuration of a plug 1 which is one type of connection device will be described. The plug 1 is, for example, a phone plug for connecting an acoustic device such as an instrument, an effector, and an audio interface, etc. to a cable 90. FIG. 1 is an external view showing the plug 1, the first cable 90a and the second cable 90b according to Embodiment 1. In the plug 1 of Embodiment 1, the direction of the X-axis arrow is taken as the front, and the direction opposite to the X-axis arrow direction is taken as the rear. Also, the direction of the Y-axis arrow is taken as the right, and the direction opposite to the Y-axis arrow direction is taken as the left. And the direction of the Z-axis arrow is taken as the upper, and the direction opposite to the Z-axis arrow direction is taken as the lower. 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 both have the same configuration, when not distinguishing between the first cable 90a and the second cable 90b, they are simply referred to as the cable 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 the first cable 90a and the second cable 90b are housed, and a cap 80 covering a part of the housing 5. The first electrode 2, the second electrode 3, and the third electrode 4 are arranged side by side in this order from the front to the rear.

[0011] The materials of the first electrode 2, the second electrode 3, the third electrode 4, the housing 5 and the cap 80 are conductive metals. The materials of the first insulating portion 7 and the second insulating portion 8 are, for example, resins. The plug 1 of Embodiment 1 is a phone plug (so-called, standard plug) with a diameter of 6.3 mm for the second electrode 3. Also, the plug 1 of Embodiment 1 is a solderless plug that can electrically connect the electrode and the cable 90 without soldering.

[0012] Figure 2 is a schematic diagram showing the internal structure of a cable 90 attached to a plug 1 according to Embodiment 1. As shown in Figure 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 made up of multiple thin single wires twisted together. The core wire 91 is covered with an insulator 92. A shield wire 93 is provided in a mesh-like pattern around the outer circumference of the insulator 92. The shield wire 93 is covered with a protective film 94. The materials of the core wire 91 and the shield wire 93 are, for example, copper. The material of the insulator 92 is, for example, polyethylene. The material of the protective film 94 is, for example, vinyl.

[0013] Figure 3 is a plan view showing the plug 1 according to Embodiment 1. Figure 4 is a perspective view showing the plug 1 according to Embodiment 1. Note that the cap 80 is not shown in the following figures. As shown in Figures 3 and 4, the housing 5 of the plug 1 has a first viewing hole 11a and a second viewing 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), and a first connecting pin 15a and a second connecting pin 15b.

[0014] The first peephole 11a is an oval-shaped opening formed on the upper surface of the housing 5. The first peephole 11a is used to observe the inside of the housing 5 when bringing the first cable 90a into contact with the first connection pin 15a. The second peephole 11b is an oval-shaped opening formed on the upper surface of the housing 5. The second peephole 11b is used to observe the inside of the housing 5 when bringing the second cable 90b 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 for fastening the first screw 14a. The first screw hole 12a is formed behind the first peephole 11a. The second screw hole 12b is for fastening the second screw 14b. The second screw hole 12b is formed behind 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 houses the first cable 90a. A first insertion opening 13a, which is the entrance for inserting the first cable 90a into the first storage section 22a, is formed on the rear surface of the housing 5 (an example of the end surface of the present invention). The first insertion opening 13a is circular in shape. The second storage section 22b is formed inside the housing 5, separated from the first storage section 22a, and houses the second cable 90b. A second insertion opening 13b, which is the 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 in shape. 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 secures the first cable 90a housed in the housing 5 by being fastened into the first screw hole 12a. The first screw 14a is made of a conductive metal. The second screw 14b secures the second cable 90b housed in the housing 5 by being fastened into the second screw hole 12b. The second screw 14b is made of a conductive metal.

[0018] The first connecting pin 15a is provided in the first storage section 22a and contacts the core wire 91 of the first cable 90a when the first cable 90a is housed in the housing 5. The first connecting pin 15a is made of a conductive metal. The second connecting pin 15b is provided in the second storage section 22b and contacts the core wire 91 of the second cable 90b when the second cable 90b is housed in the housing 5. The second connecting pin 15b is made of a conductive metal. The first connecting pin 15a and the second connecting pin 15b are arranged side by side in the left-right direction of the housing 5.

[0019] Figure 5 is a schematic cross-sectional view of the plug 1 according to Embodiment 1. Figure 5 shows the XY plane of the plug 1 at the position including the first connection pin 15a and the second connection pin 15b. Figure 5 also shows the cable 90 connected to the plug 1. The cross-sectional structure of a portion of the cable 90 housed in the housing 5 is shown. Furthermore, the dashed line A1 in Figure 5 indicates the central axis of the plug 1.

[0020] As shown in Figure 5, the first electrode 2 has a tip 61 located at the tip of the plug 1, and a cylindrical connector 62 that electrically connects the tip 61 to the first mounting portion 21a, which will be described later. The second electrode 3 has a cylindrical ring 63 located behind the tip 61, and a cylindrical connector 64 that electrically connects the ring 63 to the second connecting pin 15b. The third electrode 4 corresponds to the sleeve in a phone plug and is electrically connected to the cylindrical housing 5. The first connecting pin 15a and the second connecting pin 15b are both located off-center from the central axis A1 of the plug 1. The first connecting pin 15a and the second connecting pin 15b face each other across the central axis A1 of the plug 1. The first connecting pin 15a is located in front of the first housing portion 22a. The second connecting pin 15b is located in front of the second housing portion 22b.

[0021] 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 connecting pin 15a is fixed. The first mounting portion 21a is made of a conductive metal and electrically connects the first connecting pin 15a to the connection portion 62 of the first electrode 2. The second mounting portion 21b is a member through which the second connecting pin 15b is inserted. The second mounting portion 21b is made of an insulating material such as resin and is positioned 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 regarding the structure of the first mounting portion 21a and the second mounting portion 21b, as well as the method of fixing the first connecting pin 15a and the second connecting pin 15b, will be described later with reference to a separate figure.

[0022] The core wire 91 of the first cable 90a housed in the first storage section 22a is in contact with the first connection pin 15a in a manner in which multiple strands of wire are intertwined. As described above, the first connection pin 15a and the first electrode 2 are electrically connected by the first mounting section 21a. Therefore, the first electrode 2, the first mounting section 21a, the first connection pin 15a, and the core wire 91 of the first cable 90a are electrically connected.

[0023] Furthermore, the tip of the first screw 14a, which is fastened to the housing 5, penetrates the protective sheath 94 of the first cable 90a and contacts the shield wire 93 in the area B1 enclosed by the circular dashed line. However, in Figure 5, area B1 is drawn larger for illustrative purposes. 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.

[0024] The core wire 91 of the second cable 90b housed in the second storage section 22b is in contact with the second connection pin 15b in a manner in which multiple strands of wire are intertwined. Furthermore, the second connection pin 15b and the second electrode 3 are electrically connected. As a result, the second electrode 3, the second connection pin 15b, and the core wire 91 of the second cable 90b are electrically connected.

[0025] Furthermore, the tip of the second screw 14b, which is fastened to the housing 5, penetrates the protective sheath 94 of the second cable 90b and contacts the shield wire 93 in area B2, which is enclosed by a circular dashed line. However, in Figure 5, area B2 is drawn larger for illustrative purposes. 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.

[0026] The plug 1 has a first insulating portion 7 and a second insulating portion 8 that are 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 is provided to contact the tip 61 and connection portion 62 of the first electrode 2, and the ring 63 and connection portion 64 of the second electrode 3, thereby electrically insulating the first electrode 2 and the second electrode 3. The second insulating portion 8 is cylindrical and is provided to contact the ring 63 and connection portion 64 of the second electrode 3, and the third electrode 4, thereby electrically insulating the second electrode 3 and the third electrode 4.

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

[0028] Here, we will describe how to attach the first cable 90a and the second cable 90b to the plug 1. First, the user inserts the first cable 90a forward through 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 this time, the core wire 91 comes into contact with the first connection pin 15a in a way that it wraps around it. 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 is electrically connected to the first electrode 2.

[0029] Subsequently, the user inserts the first screw 14a into the first screw hole 12a and rotates the first screw 14a with a screwdriver to secure it in the first screw hole 12a. At this time, the user pushes the first screw 14a in until it penetrates the protective sheath 94 of the first cable 90a and reaches the shield wire 93. As a result, the shield wire 93 of the first cable 90a and the housing 5 are electrically connected via the first screw 14a, and the shield wire 93 of the first cable 90a is electrically connected to the third electrode 4.

[0030] Similarly, the user inserts the second cable 90b forward through 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 this time, the core wire 91 comes into contact with the second connection pin 15b in a way that it wraps around it. As a result, the core wire 91 of the second cable 90b is electrically connected to the second connection pin 15b, thereby electrically connecting the core wire 91 of the second cable 90b to the second electrode 3.

[0031] Subsequently, the user inserts the second screw 14b into the second screw hole 12b and rotates the second screw 14b with a screwdriver to secure it in the second screw hole 12b. At this time, the user pushes the second screw 14b in until it penetrates the protective sheath 94 of the second cable 90b and reaches the shield wire 93. This electrically connects the shield wire 93 of the second cable 90b to the housing 5 via the second screw 14b, and electrically connects the shield wire 93 of the second cable 90b to the third electrode 4.

[0032] Figure 6 is a rear view of the plug 1 according to Embodiment 1. In Figure 6, C1 indicates the point where the central axis A1 of the plug 1 passes through the rear surface of the plug 1. 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 at 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 rotation. Consequently, workability for the first storage section 22a and the second storage section 22b, or for parts arranged inside them, is improved.

[0033] Figures 7 and 8 will be used to describe in detail the structure of the first mounting portion 21a and the second mounting portion 21b, as well as the method of fixing the first connecting pin 15a and the second connecting pin 15b. Figure 7 is a perspective view showing the rear end of the plug 1 with the housing 5 removed according to Embodiment 1. Figure 8 is an exploded perspective view showing the rear end of the plug 1 with the housing 5 removed according to Embodiment 1. Figure 8 is a drawing showing the parts shown in Figure 7 disassembled. However, the third electrode 4 and the insulating member 32 are not shown in Figure 8. As shown in Figures 7 and 8, the first connecting 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 with a larger diameter than the rod portion 41a. The second connecting 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, which has a larger diameter than the rod portion 41b.

[0034] The connection portion 64 of the second electrode 3 has a cylindrical portion 65 and an enlarged diameter portion 66 connected to the rear of the cylindrical portion 65. The cylindrical portion 65 has a cylindrical shape. The enlarged diameter portion 66 has a disc shape and a larger diameter than the cylindrical portion 65. The enlarged 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 enlarged 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 of the base portion 23a. The base portion 23a has a disc-like shape. The outer shape of the rear surface of the base portion 23a corresponds to a part of a circle divided by a straight line. The sides 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 connecting pin 15a is fitted. The fitting hole 25a of the base portion 23a is formed on the opposite side in the Y-axis direction from the fitting hole 67b formed in the enlarged diameter portion 66 of the second electrode 3, with the central axis A1 of the plug 1 in between. The shaft portion 24a has a cylindrical shape. The shaft portion 24a is inserted into the through hole 53 of the second mounting portion 21b, which will be described later. The first mounting portion 21a has a through hole 52 formed that penetrates 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 of the insertion portion 23b. The insertion portion 23b has a disc-like shape. A stepped shape is formed at the rear of the insertion portion 23b. If the surface located at the lower step of the stepped shape is called the lower step surface 28b, and the surface of the base portion 23a of the first mounting portion 21a that contacts the lower step surface 28b is called the contact surface 28a, then the outer shapes of the lower 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 in the front-rear direction, the lower step surface 28b of the insertion portion 23b and the contact surface 28a of the base portion 23a have the same outer shape as the rear surface of the base portion 23a. Furthermore, the dimension of the step in the stepped shape formed on 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) of the base portion 23a in the front-rear direction are approximately equal. Therefore, as shown in Figure 7, when 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 a single circular surface without any steps. Also, the side surface of the insertion portion 23b is parallel in the front-rear direction, similar to the side surface of the base portion 23a. Therefore, as shown in Figure 7, when 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 any steps. Therefore, when the first mounting portion 21a and the second mounting portion 21b are combined, they form a disc shape with no missing parts on the outer surface.

[0037] The insertion portion 23b has an insertion hole 25b through which the shaft portion 24b of the second connecting pin 15b is inserted. The insertion hole 25b of the insertion portion 23b is formed opposite the fitting hole 25a formed in the base portion 23a of the first mounting portion 21a, with the central axis A1 of the plug 1 in between. The shaft portion 24b has a 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 through the base portion 23a and the shaft portion 24b. The connecting portion 62 of the first electrode 2 is inserted through the through holes 51, 52 and 53 and contacts the first mounting portion 21a.

[0038] The procedure for fixing the first connecting pin 15a and the second connecting pin 15b will now be described. First, the fitting portion 43b of the second connecting pin 15b is inserted into the fitting hole 67b of the connection portion 64 of the second electrode 3. This fixes the second connecting 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 rod portion 41b of the second connecting pin 15b are inserted into the through 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. Subsequently, 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 connecting pin 15a is inserted into the fitting hole 25a of the first mounting portion 21a. This fixes the first connecting pin 15a to the first mounting portion 21a. As described above, the lower step surface 28b and the contact surface 28a have the same outer shape. Therefore, there is only one orientation in which the first mounting portion 21a is attached to the second mounting portion 21b. Thus, the fitting hole 25a formed in the first mounting portion 21a and the through hole 25b formed in the second mounting portion 21b can be precisely positioned. This allows the first connecting pin 15a, which is fitted into the fitting hole 25a, and the second connecting pin 15b, which is inserted through the through hole 25b, to be positioned precisely.

[0039] As described above, the plug 1 of Embodiment 1 has a first electrode 2 and a first connection pin 15a that is electrically connected to the core wire 91 of the first cable 90a, and a second connection pin 15b that is electrically connected to the second electrode 3 and the core wire 91 of the second cable 90b. According to the plug 1 of Embodiment 1, 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 Embodiment 1, a two-pole coaxial cable, which has been used conventionally with two-pole plugs, is connected as cable 90. Therefore, the same type of cable can be used for both the two-pole plug and the three-pole plug 1 of Embodiment 1, which is convenient.

[0041] (Variation 1) Figure 9 is a plan view showing a plug 1A according to a modified example 1 of Embodiment 1. As shown in Figure 9, the plug 1A is an L-shaped plug, and the housing 5A has a curved shape that bends to the side. Also in Figure 9, the areas where the first storage section 22a and the second storage section 22b are formed inside the housing 5A are indicated by dashed lines. The first insertion opening 13a and the second insertion opening 13b are formed not on the rear surface of the housing 5A, but on the right side surface of the housing 5A (an example of the end surface of the present invention). Even in the L-shaped plug 1A, by having a configuration with a first connection pin 15a and a 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] (Modification 2) Figure 10 is a plan view showing a plug 1B according to a modified example 2 of Embodiment 1. In Figure 10, the corresponding components to the plug 1 of Embodiment 1 are indicated with the subscript "B". As shown in Figure 10, the plug 1B has a first electrode 2B, a second electrode 3B, a third electrode 4B, a first insulating part 7B provided between the first electrode 2B and the second electrode 3B, a second insulating part 8B provided between the second electrode 3B and the third electrode 4B, and a housing 5B that houses the first cable 90a and the second cable 90b. The plug 1B of Modified Example 2 of Embodiment 1 is a phone plug (so-called mini plug) with a second electrode 3B having a diameter of 3.5 mm. The housing 5B of plug 1B has 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 Figure 10, the areas inside the housing 5B where the first storage section 22aB and the second storage section 22bB are formed are shown by dashed lines. 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. In the modified plug 1B of Embodiment 1, by having the first connection pin 15aB and the second connection pin 15bB, 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) Figure 11 is a plan view showing plug 1C according to modification 3 of Embodiment 1. Figure 12 is a plan view showing plug 1C according to modification 3 of Embodiment 1. Figure 12 is a view of the plug in Figure 11 from the opposite side. Figure 13 is a perspective view showing plug 1C according to modification 3 of Embodiment 1. 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 part 7C provided between the first electrode 2C and the second electrode 3C, a second insulating part 103C provided between the second electrode 3C and the fourth electrode 101C, a third insulating part 104C provided between the fourth electrode 101C and the fifth electrode 102C, a fourth insulating part 105C provided between the fifth electrode 102C and the third electrode 4C, and a housing 5C that houses the first cable 90a, the second cable 90b, the third cable and the fourth cable (not shown). The first electrode 2C, the second electrode 3C, the fourth electrode 101C, the fifth electrode 102C, and the third electrode 4C are arranged in this order from front to back. Plug 1C is a 5-pole plug with a configuration that adds the fourth electrode 101C and the fifth electrode 102C, which function as a so-called ring, to the plug 1 described in Embodiment 1. Both the third cable and the fourth cable 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, they are referred to as cable 90.

[0044] The material 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 is a conductive metal. The material of the first insulating part 7C, the second insulating part 103C, the third insulating part 104C, and the fourth insulating part 105C is, for example, resin. The plug 1C of the modified example 3 of Embodiment 1 is a 5-pole phone plug with a second electrode 3C diameter of 4.4 mm. The plug 1C can be attached to a headphone cable, for example. The plug 1C of the modified example 3 of Embodiment 1 is also a solderless plug that allows the electrodes and the cable 90 to be electrically connected without soldering.

[0045] The housing 5C of plug 1C has a first peephole 11aC, a second peephole 11bC, a third peephole 11cC, and a fourth peephole 11dC. The housing 5C of plug 1C also has a first screw hole 12aC, a second screw hole 12bC, a third screw hole 12cC, and a fourth screw hole 12dC. Furthermore, the housing 5C of plug 1C has a first storage section 22aC, a second storage section 22bC, a third storage section 22cC, and a fourth storage section 22dC. In Figures 11 and 12, the areas within 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 are indicated by dashed lines. Furthermore, plug 1C has a first screw 14aC, a second screw 14bC, a third screw 14cC, and a fourth screw 14dC. Plug 1C also has a first connecting pin 15aC, a second connecting pin 15bC, a third connecting pin 15cC, and a fourth connecting pin 15dC.

[0046] The first peephole 11aC is an oval-shaped opening formed on the upper surface of the housing 5C. The first peephole 11aC is used to observe the inside of 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-shaped opening formed on the upper surface of the housing 5C. The second peephole 11bC is used to observe the inside of 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-shaped opening formed on the upper surface of the housing 5C. The third peephole 11cC is used to observe the inside of the housing 5C when the third cable is brought into contact with the third connection pin 15cC. The fourth peephole 11dC is an oval-shaped opening formed on the upper surface of the housing 5C. The fourth peephole 11dC is used to observe the inside of 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 opposite each other in the up-down direction of the housing 5C.

[0047] The first screw hole 12aC is for fastening the first screw 14aC. The first screw hole 12aC is formed behind the first peephole 11aC. The second screw hole 12bC is for fastening the second screw 14bC. The second screw hole 12bC is formed behind the second peephole 11bC. The third screw hole 12cC is for fastening the third screw 14cC. The third screw hole 12cC is formed behind the third peephole 11cC. The fourth screw hole 12dC is for fastening the fourth screw 14dC. The fourth screw hole 12dC is formed behind 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 opposite each other in the up-down direction of the housing 5C.

[0048] The first storage section 22aC is formed inside the housing 5C and houses the first cable 90a. A first insertion opening 13aC, which is the entrance for inserting the first cable 90a into the first storage section 22aC, is formed on the rear surface of the housing 5C. The first insertion opening 13aC is circular in shape. The second storage section 22bC is formed inside the housing 5C and houses the second cable 90b. A second insertion opening 13bC, which is the entrance for inserting the second cable 90b into the second storage section 22bC, is formed on the rear surface of the housing 5C. The second insertion opening 13bC is circular in shape. The third storage section 22cC is formed inside the housing 5C and houses the third cable. A third insertion opening 13cC, which is the entrance for inserting the third cable into the third storage section 22cC, is formed on the rear surface of the housing 5C. The third insertion opening 13cC is circular in shape. The fourth storage section 22dC is formed inside the housing 5C and houses the fourth cable. The fourth insertion opening 13dC, which is the 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 in shape. 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 opposite each other in the vertical direction of the housing 5C.

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

[0050] The first connecting pin 15aC is provided in the first housing 22aC and contacts the core wire 91 of the first cable 90a when the first cable 90a is housed in the housing 5C. The first connecting pin 15aC is made of a conductive metal. The second connecting pin 15bC is provided in the second housing 22bC and contacts the core wire 91 of the second cable 90b when the second cable 90b is housed in the housing 5C. The second connecting pin 15bC is made of a conductive metal. The third connecting pin 15cC is provided in the third housing 22cC and contacts the core wire 91 of the third cable when the third cable is housed in the housing 5C. The third connecting pin 15cC is made of a conductive metal. The fourth connection pin 15dC is provided in the fourth housing 22dC and contacts the core wire 91 of the fourth cable when the fourth cable is housed 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 each other in the up-down direction of the housing 5C.

[0051] Although the internal structure of plug 1C in modified example 3 of Embodiment 1 is not shown, in plug 1C, the first electrode 2C, the second electrode 3C, the fourth electrode 101C, and the fifth electrode 102C are connected to the core wires 91 of each cable 90, in the same manner as in Embodiment 1. In addition, the third electrode 4C is connected to the shield wires 93 of each cable 90.

[0052] Specifically, the core wire 91 of the first cable 90a housed in the first storage section 22aC is in contact with the first connection pin 15aC in such a way that multiple strands of wire are intertwined. In addition, 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] Furthermore, the tip of the first screw 14aC, which is fastened to the housing 5C, penetrates the protective sheath 94 of the first cable 90a and is in contact with the shield wire 93. Also, the third electrode 4C and the housing 5C are electrically connected. As a result, the third electrode 4C, the housing 5C, the first screw 14aC, and the shield wire 93 of the first cable 90a are electrically connected.

[0054] The core wire 91 of the second cable 90b housed in the second storage section 22bC is in contact with the second connection pin 15bC in a manner in which multiple strands of wire are intertwined. Furthermore, the second connection pin 15bC and the second electrode 3C are electrically connected. As a result, the second electrode 3C, the second connection pin 15bC, and the core wire 91 of the second cable 90b are electrically connected.

[0055] Furthermore, the tip of the second screw 14bC, which is fastened to the housing 5C, penetrates the protective sheath 94 of the second cable 90b and makes contact with the shield wire 93. Also, the third electrode 4C and the housing 5C are electrically connected. As a result, the third electrode 4C, the housing 5C, the second screw 14bC, and the shield wire 93 of the second cable 90b are electrically connected.

[0056] The core wire 91 of the third cable housed in the third storage section 22cC is in contact with the third connection pin 15cC in a manner in which multiple strands of wire are intertwined. Furthermore, the third connection pin 15cC and the fourth electrode 101C are electrically connected. As a result, the fourth electrode 101C, the third connection pin 15cC, and the core wire 91 of the third cable are electrically connected.

[0057] Furthermore, the tip of the third screw 14cC, which is fastened to the housing 5C, penetrates the protective sheath 94 of the third cable and is in contact with the shield wire 93. Also, the third electrode 4C and the housing 5C are electrically connected. Thus, the third electrode 4C, the housing 5C, the third screw 14cC, and the shield wire 93 of the third cable are electrically connected.

[0058] The core wire 91 of the fourth cable housed in the fourth storage section 22dC is in contact with the fourth connection pin 15dC in a manner in which multiple strands of wire are intertwined. Furthermore, the fourth connection pin 15dC and the fifth electrode 102C are electrically connected. As a result, the fifth electrode 102C, the fourth connection pin 15dC, and the core wire 91 of the fourth cable are electrically connected.

[0059] Furthermore, the tip of the fourth screw 14dC, which is fastened to the housing 5C, penetrates the protective sheath 94 of the fourth cable and is in contact with the shield wire 93. Also, the third electrode 4C and the housing 5C are electrically connected. As a result, the third electrode 4C, the housing 5C, the fourth screw 14dC, and the shield wire 93 of the fourth cable are electrically connected.

[0060] According to the plug 1C of the modified example 3 of Embodiment 1, by having a configuration with a first connection pin 15aC, a second connection pin 15bC, a third connection pin 15cC, and a fourth connection pin 15dC, the first cable 90a, the second cable 90b, the third cable, and the fourth cable that transmit signals corresponding to the five electrodes can be connected without soldering.

[0061] Embodiment 2. In Embodiment 2, the configuration of plug 1D, a type of connecting device, will be described. Plug 1D is an XLR plug for connecting an XLR jack and a cable 90. In the following, explanations of parts common to Embodiment 1 will be omitted as appropriate, and the differences will be the focus of the explanation.

[0062] Figure 14 is a perspective view showing plug 1D according to Embodiment 2. Figure 15 is a perspective view showing plug 1D according to Embodiment 2. In plug 1D of Embodiment 2, the X-axis arrow direction is forward, and the direction opposite to the X-axis arrow direction is backward. The Y-axis arrow direction is to the right, and the direction opposite to the Y-axis arrow direction is to the left. The Z-axis arrow direction is upward, and the direction opposite to the Z-axis arrow direction is downward. As shown in Figures 14 and 15, plug 1D has a housing 5D that houses the first electrode 2D, the second electrode 3D, the third electrode 4D, the first cable 90a and the second cable 90b, and a frame 6D that houses the first electrode 2D, the second electrode 3D and the third electrode 4D. However, the cables are not shown in the figures of Embodiment 2. Plug 1D of Embodiment 2 is a solderless plug that can electrically connect electrodes and cables 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 for transmitting a positive-phase signal (pin 2 for hot). The second electrode 3D is a pin for transmitting an out-of-phase signal (pin 3 for cold). The third electrode 4D is a pin for transmitting a signal indicating a reference voltage (pin 1 for ground).

[0064] The housing 5D of the plug 1D has a first screw hole 12aD and a second screw hole 12bD, as well as a first storage section 22aD and a second storage section 22bD. The plug 1D also has a first screw 14aD and a second screw 14bD.

[0065] The first screw hole 12aD is for fastening the first screw 14aD. The first screw hole 12aD is formed on the lower surface of the housing 5D. The second screw hole 12bD is for fastening the second screw 14bD. The second screw hole 12bD is formed on the left side, which is different from the lower surface where the first screw hole 12aD is formed.

[0066] The first storage section 22aD is formed inside the housing 5D and houses the first cable 90a. A first insertion opening 13aD, which is the 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 in shape. The second storage section 22bD is formed inside the housing 5D and houses the second cable 90b. A second insertion opening 13bD, which is the 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 in shape.

[0067] The first screw 14aD secures the first cable 90a housed in the housing 5D by tightening the first screw hole 12aD. The first screw 14aD is made of a conductive metal. The second screw 14bD secures the second cable 90b housed in the housing 5D by tightening the second screw hole 12bD. The second screw 14bD is made of a conductive metal.

[0068] Figure 16 is a rear view of plug 1D according to Embodiment 2. However, the first screw 14aD and the second screw 14bD are not shown in Figure 16. As shown in Figure 16, plug 1D has a first connecting pin 15aD and a second connecting pin 15bD. The first connecting pin 15aD is located on the front side of the first housing 22aD. The first connecting pin 15aD contacts the core wire 91 of the first cable 90a when the first cable 90a is housed in the housing 5D. The first connecting pin 15aD is made of a conductive metal. The second connecting pin 15bD is located on the front side of the second housing 22bD. The second connecting pin 15bD contacts the core wire 91 of the second cable 90b when the second cable 90b is housed in the housing 5D. The second connecting pin 15bD is made of a conductive metal.

[0069] Figure 17 is a schematic cross-sectional view of a plug 1D according to Embodiment 2. Figure 17 shows the XY plane at the location where the first electrode 2D and the third electrode 4D of the plug 1D are located. The dashed line A2 indicates the central axis of the plug 1D. As shown in Figure 17, the plug 1D has a conductive pin 71. The conductive pin 71 is located off-center from 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. A first connecting pin 15aD is also located off-center from the central axis A2 of the plug 1D. The first connecting pin 15aD is electrically connected to the first electrode 2D. Although not shown in the figure, a second connecting pin 15bD is also located off-center from the central axis A2 of the plug 1D and, similar to the first connecting pin 15aD, is electrically connected to the second electrode 3D.

[0070] Although the cable is not shown in the diagram, the first cable 90a housed in the first storage section 22aD has multiple strands of wire intertwined with the first connection pin 15aD and is in contact with it. 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. Also, the tip of the first screw 14aD, which is fastened to the housing 5D, penetrates the protective sheath 94 of the first cable 90a and is in contact with 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 in the diagram, 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. In other words, 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 to contact the first electrode 2D, the second electrode 3D, and the third electrode 4D, and electrically insulates them. The insulating member 35 is provided to contact the first connection pin 15aD, the second connection pin 15bD, and the conductive pin 71, and electrically insulates them.

[0073] Figure 18 is a rear view of the plug 1D with the screws removed, according to Embodiment 2. In Figure 18, C2 indicates the 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 rotation. Consequently, workability for the first storage section 22aD and the second storage section 22bD, or for parts arranged inside them, is improved.

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

[0075] Embodiment 3. In Embodiment 3, the configuration of Jack 1E, a type of connection device, will be described. Jack 1E is an XLR jack for connecting an XLR plug and a cable 90. In the following, explanations of parts common to Embodiment 1 will be omitted as appropriate, and the differences will be the focus of the explanation.

[0076] Figure 19 is a perspective view showing jack 1E according to Embodiment 3. Figure 20 is a perspective view showing jack 1E according to Embodiment 3. In jack 1E, at 1C, the direction opposite to the X-axis arrow direction is forward, and the direction of the X-axis arrow direction is backward. Also, the direction opposite to the Y-axis arrow direction is to the right, and the direction of the Y-axis arrow direction is to the left. Furthermore, the direction of the Z-axis arrow direction is upward, and the direction opposite to the Z-axis arrow direction is downward. As shown in Figures 19 and 20, jack 1E has a housing 5E that houses the first electrode 2E, the second electrode 3E, the third electrode 4E, the first cable 90a and the second cable 90b, and a frame 6E that houses the first electrode 2E, the second electrode 3E and the third electrode 4E. However, in each figure of Embodiment 3, the illustration of the cables is omitted. Jack 1E of Embodiment 3 is a solderless jack that can electrically connect the electrodes and the cable 90 without soldering.

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

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

[0079] The first screw hole 12aE is for fastening the first screw 14aE. The first screw hole 12aE is formed on the lower surface of the housing 5E. The second screw hole is for fastening the second screw 14bE. The second screw hole is formed on the right side, which is different from the lower surface where the first screw hole 12aE is formed.

[0080] The first storage section 22aE is formed inside the housing 5E and houses the first cable 90a. A first insertion opening 13aE, which is the 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 in shape. The second storage section 22bE is formed inside the housing 5E and houses the second cable 90b. A second insertion opening 13bE, which is the 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 in shape.

[0081] The first screw 14aE secures 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 secures 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] Figure 21 is a rear view of the jack 1E according to Embodiment 3. However, the first screw 14aE and the second screw 14bE are not shown in Figure 21. As shown in Figure 21, the jack 1E has a first connecting pin 15aE and a second connecting pin 15bE. The first connecting pin 15aE is located on the front side of the first housing 22aE. The first connecting pin 15aE contacts the core wire 91 of the first cable 90a when the first cable 90a is housed in the housing 5E. The first connecting pin 15aE is made of a conductive metal. The second connecting pin 15bE is located on the front side of the second housing 22bE. The second connecting pin 15bE contacts the core wire 91 of the second cable 90b when the second cable 90b is housed in the housing 5E. The second connecting pin 15bE is made of a conductive metal.

[0083] Figure 22 is a schematic cross-sectional view showing a jack 1E according to Embodiment 3. Figure 22 shows the XY plane at the location where the first electrode 2E and the third electrode 4E are located in the jack 1E. The dashed line A3 indicates the central axis of the jack 1E. As shown in Figure 22, the jack 1E has a conductive pin 72. The conductive pin 72 is located off-center from 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. A first connection pin 15aE is also located off-center from the central axis A3 of the jack 1E. The first connection pin 15aE is electrically connected to the first electrode 2E. Although not shown in the figure, a second connection pin 15bE is also located off-center from the central axis A3 of the jack 1E and, similar to the first connection pin 15aE, is electrically connected to the second electrode 3E.

[0084] Although the cable is not shown in the diagram, the first cable 90a housed in the first storage section 22aE has multiple strands of wire intertwined with the first connection pin 15aE. 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. Also, the tip of the first screw 14aE fastened to the housing 5E penetrates the protective sheath 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 diagram, 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. In other words, the first electrode 2E, the second connection pin 15bE, and the core wire 91 of the second cable 90b are electrically connected. In addition, 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] Jack 1E has insulating members 36 and 37 made of, for example, resin. Insulating member 36 is provided to contact the first electrode 2E, the second electrode 3E, and the third electrode 4E, and electrically insulates them. Insulating member 37 is provided to contact the first connection pin 15aE, the second connection pin 15bE, and the conductive pin 72, and electrically insulates them.

[0087] Figure 23 is a rear view of the jack 1E with the screws removed according to Embodiment 3. In Figure 23, point C3 indicates the 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 at 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 rotation. Consequently, workability for the first storage section 22aE and the second storage section 22bE, or for parts arranged inside them, is improved.

[0088] Furthermore, as described in Embodiment 2, the center I2 of the insertion opening of the first housing section 22aC and the center J2 of the insertion opening of the second housing section 22bC are located on the circumference of a circle centered at C2. Therefore, when the XLR plug of Embodiment 2 and the XLR jack of Embodiment 3 are arranged so that their respective electrodes face in the same direction, the housing 5C of Embodiment 2 and the housing 5E of Embodiment 3 differ only in their orientation. Consequently, the housing 5C of Embodiment 2 and the housing 5E of Embodiment 3 can be used interchangeably, which is convenient.

[0089] As described above, the jack 1E of Embodiment 3 has a first electrode 2E and a first connection pin 15aE that is electrically connected to the core wire 91 of the first cable 90a, and a second electrode 3E and a second connection pin 15bE that is 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 describes embodiments and modifications of the present invention. However, the present invention is not limited to the configurations of the above embodiments and modifications, and various modifications are possible within the scope of its technical idea. For example, although the case in which the connecting device (phone plug) of Embodiment 1 or its modification has three or five electrodes has been described, the connecting device may have four electrodes. Also, although the case in which the connecting devices (XLR plug and XLR jack) of Embodiments 2 and 3 have three electrodes has been described, the connecting device may have four or five electrodes. In any case, the connecting device should be provided with the same number of connecting pins as the number of 2-pole cables to be connected.

[0091] Furthermore, the cable connected to the connecting device may be a coaxial parallel cable formed by integrally constructing 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. In this case, the first shield wire and the second shield wire are the same, and the first and second insertion ports may be integrally formed.

[0092] Furthermore, in the embodiment, the case in which the fixing means for fixing the cable 90 is a screw was described as an example. However, the fixing means may take other forms. 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 together and entangled with a conductor that is electrically connected to the housing, thereby electrically connecting it to the first electrode or the second electrode. This conductor may be the leaf spring described above, or it may be something other than a leaf spring. Note that if 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 the 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 Insulation, 7C First Insulation, 8 Second Insulation, 11a First Peep Hole, 11aB First Peep Hole, 11aC First Peep Hole, 11b Second Peep Hole, 11bB Second Peep Hole, 11bC Second Peep Hole, 11cC Third peephole, 11dC Fourth peephole, 12a First screw hole, 12aB First screw hole, 12aC First screw hole, 12aD First screw hole, 12aE First screw hole, 12b Second screw hole, 12bB Second screw hole, 12bC Second screw hole, 12bD Second screw hole, 12cC Third screw hole, 12dC Fourth screw hole, 13a First insertion opening, 13aC First insertion opening, 13aD First insertion opening, 13aE First insertion opening, 13b Second insertion opening, 13bC Second insertion opening, 13bD Second insertion opening, 13bE Second insertion opening, 13cC Third insertion opening, 13dC Fourth insertion opening, 14a First screw, 14aB First 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 connecting pin, 15aB First connecting pin, 15aC First connecting pin, 15aD First connecting pin, 15aE First connecting pin, 15b Second connecting pin, 15bB Second connecting pin, 15bC Second connecting pin, 15bD Second connecting pin, 15bE Second connecting pin, 15cC Third connecting pin, 15dC Fourth connecting pin, 21a First mounting part, 21b Second mounting part, 22a First storage part, 22aB First storage part, 22aC First storage part, 22aD First storage compartment, 22aE First storage compartment, 22b Second storage compartment, 22bB Second storage compartment, 22bC Second storage compartment, 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 Low step 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 Conduction pin, 72 Conduction pin, 80 Cap, 90 Cable, 90a First cable, 90b Second cable, 91 Core wire, 92 Insulator, 93 Shield wire, 94 Protective sheath, 101C Fourth electrode, 102C Fifth electrode, 103C Second insulation, 104C Third insulation, 105C Fourth insulation.

Claims

1. A connecting device that connects 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, without soldering, 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, The device comprises 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. Connection device.

2. The aforementioned housing is A first storage compartment for housing the first cable, It has a second storage compartment that is separated from the first storage compartment and houses the second cable. The connecting device according to claim 1.

3. The end face of the housing has an insertion opening for the first storage section and an insertion opening for the second storage section formed therein. The center of the insertion opening of the first storage unit and the center of the insertion opening of the second storage unit are located on the circumference of a circle centered on the point through which the central axis of the connecting device passes the end face. The connecting device according to claim 2.

4. A first fixing means for fixing the first cable to the housing and electrically connecting the first shield wire to the housing, The second cable is fixed to the housing, and a second fixing means is provided for electrically connecting the second shield wire to the housing. A connecting device according to any one of claims 1 to 3.

5. The first and second fastening means are screws. The connecting device according to claim 4.

6. The connecting device is a phone plug, The first electrode includes a tip, The second electrode described above includes a ring, The third electrode is a sleeve. A connecting device according to any one of claims 1 to 3.

7. The first and second connecting pins are located opposite each other across the central axis of the connecting device. The connecting device according to claim 6.

8. A first mounting portion connected to the first electrode and to which the first connection pin is attached, The second mounting portion into which the second connecting pin is inserted, The second mounting portion is insulating and is positioned between the second electrode and the first mounting portion. The connecting device according to claim 6.

9. A stepped shape is formed at the rear of the second mounting portion. The lower step surface located at the lower step of the stepped shape and the surface of the first mounting portion that contacts the lower step surface have the same outer shape. The connecting device according to claim 8.

10. 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 connecting pin electrically connected to the fourth electrode and the third core wire, The device further comprises a fifth electrode and a fourth connecting pin that is electrically connected to the fourth core wire, The housing accommodates 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 shield wire, the second shield wire, the third shield wire, and the fourth shield wire. The connecting device according to claim 6.

11. The connecting device is an XLR plug, The first electrode is a pin for transmitting a positive-sequence signal. The second electrode is a pin for transmitting an out-of-phase signal. The third electrode is a pin for transmitting a signal indicating a reference voltage. A connecting device according to any one of claims 1 to 3.

12. The connecting device is an XLR jack, The first electrode is a receiving portion into which a pin for transmitting a positive-phase signal is inserted. The second electrode is a receiving portion into which a pin for transmitting an inverse-phase signal is inserted. The third electrode is a receiving portion into which a pin for transmitting a signal indicating a reference voltage is inserted. A connecting device according to any one of claims 1 to 3.

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