Modular jack and wiring instrument including the same

Abstract

To improve the workability of connecting multi-core cables having a plurality of different diameters.SOLUTION: A plug insertion port 23 is provided on the front surface of a cover 20. A plurality of first contacts 40 and a plurality of terminals 50 electrically connected to the plurality of first contacts 40 are mounted on a substrate 30. A plurality of core wires of a multi-core cable can be connected to the plurality of terminals 50. A body 10 has a storage space into which an end of the multi-core cable can be inserted through an opening 11. In the body 10, a first protrusion 13 and a second protrusion 14 contacting the multi-core cable inserted into the storage space from below are arranged side by side in the front-rear direction on each of a first side surface and a second side surface located on both sides of the opening 11. The interval between the second protrusions 14 provided on the first side surface and the second side surface is wider than the interval between the first protrusions 13 provided on the first side surface and the second side surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a modular jack and a wiring device including the same. More specifically, the present disclosure relates to a modular jack to which a multi-core cable having a plurality of cores is connected, and a wiring device including the same. [Background technology]

[0002] Patent Document 1 discloses a modular jack having a plurality of terminal pieces each formed into a bifurcated fork shape. The modular jack has an insertion groove into which the sheath of a multi-core cable is inserted. The multi-core cable is inserted into the insertion groove, and the core wires of the multi-core cable are arranged in the terminal pieces. In this state, the core wires are pushed into the terminal pieces, respectively, so that the core wires are electrically connected to the terminals, respectively. Patent Document 2 also discloses a conventional example of a modular jack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-310559 A [Patent Document 2] U.S. Patent Publication No. 9,391,405 Summary of the Invention [Problem to be solved by the invention]

[0004] Modular jacks are used to build communication networks, and there are communication standards such as CAT5E, CAT6, and CAT6A, and each standard uses a different diameter multi-core cable. When multiple types of multi-core cables with different diameters are connected to a modular jack, if the width of the insertion groove is designed to accommodate a multi-core cable with a larger diameter, the multi-core cable with a smaller diameter will easily come out of the insertion groove. If the multi-core cable comes out of the insertion groove, each of the multiple cores may come out of the corresponding terminal piece, and the task of placing each of the multiple cores in the corresponding terminal piece must be redone, which may reduce the efficiency of the multi-core cable connection task.

[0005] An object of the present disclosure is to provide a modular jack that can improve the workability of connecting multi-core cables with a plurality of different diameters, and a wiring device including the same. [Means for solving the problem]

[0006] A modular jack according to an embodiment of the present disclosure includes a cover, a board, and a body. A plug insertion port into which a modular plug can be inserted is provided on the front surface of the cover. A plurality of first contacts are mounted on the board. The body is attached to the cover while holding the board. The plurality of first contacts are capable of contacting a plurality of second contacts of the modular plug when the modular plug is inserted into the plug insertion port. A plurality of terminals are mounted on the board, each of which is electrically connected to the plurality of first contacts. A plurality of core wires of a multi-core cable can be connected to the plurality of terminals. The body has a storage space into which an end of the multi-core cable can be inserted through an opening on a lower side. The body is provided with a first protrusion and a second protrusion spaced apart in the front-rear direction on each of a first side surface and a second side surface located on both the left and right sides of the opening, the first protrusion and the second protrusion contacting the multi-core cable inserted into the storage space from below. The interval between the pair of second protrusions provided on the first side surface and the second side surface, respectively, is wider than the interval between the pair of first protrusions provided on the first side surface and the second side surface, respectively.

[0007] A wiring device according to an aspect of the present disclosure includes the modular jack and an adapter. The adapter holds the modular jack and is attachable to a mounting member for mounting the wiring device to an installation surface. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a modular jack that can improve the workability of connecting multi-core cables of a plurality of different diameters, and a wiring device including the same. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a modular jack according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is an external perspective view of the modular jack with a cap removed. [Diagram 3]FIG. 3 is a perspective view of the modular jack shown in FIG. [Figure 4] FIG. 4 is a bottom view of the modular jack with the cap removed. [Diagram 5] FIG. 5 is a rear view of the modular jack with the cap removed. [Figure 6] FIG. 6 is a perspective view of a board included in the modular jack. [Figure 7] FIG. 7 is a bottom view of the substrate provided in the modular jack. [Figure 8] FIG. 8 is a bottom view of the modular jack with the base removed from the board. [Figure 9] FIG. 9 is a perspective view of a base provided on the modular jack. [Figure 10] FIG. 10 is a perspective view of a first contact mounted on a board included in the modular jack. [Figure 11] FIG. 11 is a bottom view of the pattern of the printed wiring formed on the bottom surface of the board of the modular jack. [Figure 12] FIG. 12 is a pattern diagram showing a printed wiring formed on the upper surface of a board provided in the modular jack as seen from below. [Figure 13] FIG. 13 is a circuit diagram showing a schematic representation of a part of the printed wiring formed on a substrate provided in the modular jack. [Figure 14] FIG. 14 is a perspective view of the wiring device having the modular jack mounted on a mounting frame. [Figure 15] FIG. 15 is an exploded perspective view of the wiring device including the modular jack and the mounting frame as viewed from the front. [Figure 16] FIG. 16 is an exploded perspective view of the wiring device having the modular jack as viewed from the rear. [Figure 17] FIG. 17 is an explanatory diagram for explaining a method for connecting core wires of a multi-core cable to the modular jack of the above embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a modular jack according to an embodiment and a wiring device including the same will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the dimensional ratio of the size of each component does not necessarily reflect the actual dimensional ratio. In addition, the configuration described in the following embodiment is merely one example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (Embodiment) (1) Overview A modular jack 1 of the present embodiment and a wiring device 300 including the same will be described with reference to FIGS.

[0012] The modular jack 1 of this embodiment includes a cover 20, a board 30, and a body 10, as shown in FIGS.

[0013] The cover 20 has a plug insertion port 23 on the front surface into which a modular plug 400 (see FIG. 14) can be inserted.

[0014] A plurality of first contacts 40 are mounted on the substrate 30.

[0015] The body 10 holds a substrate 30 and is attached to a cover 20 .

[0016] When the modular plug 400 is inserted into the plug insertion port 23, the first contacts 40 are capable of coming into contact with the second contacts 410 (see FIG. 14) of the modular plug 400, respectively.

[0017] A plurality of terminals 50 are mounted on the substrate 30 and are electrically connected to the plurality of first contacts 40, respectively.

[0018] To the multiple terminals 50, multiple core wires W1 of a multi-core cable CB1 (see FIG. 17) can be connected, respectively.

[0019] The body 10 has an accommodating space 121 (see FIGS. 3 and 5) into which the end of the multi-core cable CB1 can be inserted through an opening 11 on the lower side.

[0020] The body 10 has a first side 111 and a second side 112 located on both the left and right sides of the opening 11, each of which has a first protrusion 13 and a second protrusion 14 arranged in the front-to-rear direction and which contact the multi-core cable CB1 inserted into the accommodating space 121 from below.

[0021] Compared to the distance L1 between the pair of first protrusions 13 provided on the first side surface 111 and the second side surface 112, respectively, the distance L2 between the pair of second protrusions 14 provided on the first side surface 111 and the second side surface 112, respectively, is wider.

[0022] When an end of the multi-core cable CB1 is inserted into the accommodation space 121 through the opening 11, the first protrusion 13 or the second protrusion 14 provided on the first side surface 111 and the second side surface 112 respectively come into contact with the multi-core cable CB1, thereby holding the multi-core cable CB1 in the accommodation space 121. Therefore, while the multi-core cable CB1 is held in the accommodation space 121, the work of connecting the multiple core wires W1 to the multiple terminals 50 can be performed, improving the workability of the connection work of connecting the multi-core cable CB1. In addition, since the interval L2 of the second protrusions 14 provided on the first side surface 111 and the second side surface 112 respectively is wider than the interval L1 of the first protrusions 13 provided on the first side surface 111 and the second side surface 112 respectively, multiple types of multi-core cables CB1 having different diameters can be held, improving the workability of the work of connecting multi-core cables CB1 having multiple diameters.

[0023] (2) Details A multi-core cable CB1 having a plurality of pairs of wires each having two core wires W1 twisted together is connected to the modular jack 1 of this embodiment. That is, the modular jack 1 has a plurality of terminals 50, and each of the plurality of pairs of wires in the multi-core cable CB1 can be connected to the plurality of terminals 50. More specifically, the modular jack 1 of this embodiment is used, for example, to build a computer network and to connect a LAN cable conforming to the CAT6A standard with a communication speed of 10 Gbps and a transmission band of 500 MHz. In this case, the modular jack 1 has eight first contacts 40 and eight terminals 50, and four pairs of wires in the multi-core cable CB1 are connected to the eight terminals 50. That is, one core wire W1 of the corresponding pair wires is connected to each of the eight terminals 50.

[0024] A wiring device 300 (see Figs. 14 and 15) equipped with this modular jack 1 is a recessed wiring device that is installed with its rear portion recessed into an installation surface 600 such as a wall surface. The wiring device 300 can be attached to a mounting frame 500 that is used when installing a recessed wiring device on an installation surface. The illustrated mounting frame 500 is a three-unit mounting frame that can mount up to three wiring devices of a unit size. The wiring device 300 of this embodiment is formed to a size that allows up to three devices to be mounted on the illustrated mounting frame 500.

[0025] Hereinafter, the modular jack 1 according to the present embodiment and the wiring device 300 including the same will be described in detail with reference to the drawings. In the following description, the X-axis direction in FIG. 1 and the like is defined as the left-right direction, the Y-axis direction as the front-rear direction (depth direction), and the Z-axis direction as the up-down direction. Furthermore, the positive direction in the X-axis direction is defined as the right side, the positive direction in the Y-axis direction as the front side, and the positive direction in the Z-axis direction as the top side, and the surface of the modular jack 1 on which the plug insertion port 23 is provided is defined as the front side. However, these directions are merely examples, and are not intended to limit the directions in which the modular jack 1 and the wiring device 300 are used. For example, the modular jack 1 may be used with the lower part defined in this embodiment facing in a direction other than vertically downward (for example, vertically upward). Moreover, the arrows indicating the respective directions in the drawings are merely indicated for the purpose of explanation, and do not have any substance.

[0026] (2.1) Structure (2.1.1) Modular Jack As described above, the modular jack 1 includes the cover 20, the board 30, and the body 10. The modular jack 1 further includes a base 60 and a cap 70.

[0027] The cover 20 is, for example, a molded product made of electrically insulating synthetic resin. A plug insertion port 23 into which a modular plug 400 can be inserted is provided on the front side of the cover 20. The cover 20 includes a plug connection base 21 having the plug insertion port 23 provided on the front side, and a body holding base 22 protruding rearward from the rear of the plug connection base 21.

[0028] The plug connection base 21 is formed in a box shape with an opening on the rear surface. A flexible piece 24 is provided in the center in the up-down direction on each of the left and right sides of the plug connection base 21. A slit is formed around the flexible piece 24, and the rear end of the flexible piece 24 is formed to be flexible in the left-right direction. A locking claw 25 is provided on the outer side surface of the flexible piece 24. The surface of the locking claw 25 is inclined in the front-rear direction so that the amount of protrusion from the side surface of the plug connection base 21 increases toward the rear.

[0029] The body holding stand 22 protrudes rearward from the rear end of the upper part of the plug connection stand 21. The body holding stand 22 has a rectangular plate-shaped upper wall 224 and side walls 221 protruding downward from the left and right side edges of the upper wall 224. A rail piece 26 capable of coming into contact with the upper surface of the body 10 is provided on the lower surface of the upper wall 224 of the body holding stand 22 along the front-rear direction.

[0030] A flexible piece 27 (see FIG. 3) is provided on the upper part of each of the right and left sides of the plug connection base 21. A slit is formed around the flexible piece 27, and the front end of the flexible piece 27 is formed to be flexible in the left-right direction. A protrusion 28 is provided on the inner surface of the flexible piece 27, which is inclined so that the amount of inward protrusion increases toward the front.

[0031] Furthermore, holding grooves 29 are formed in the rear portions of the left and right side surfaces of the body holding base 22 .

[0032] The substrate 30 (see FIGS. 6 to 8) is, for example, a printed wiring board. The substrate 30 is formed in a flat plate shape from an electrically insulating material such as glass, an epoxy material, paper, or a phenolic material. The substrate 30 is provided with a plurality of holes A1 to A8 (see FIGS. 11 and 12) into which the press-fit portions 41 of the plurality of first contacts 40 are press-fitted, and a plurality of holes B1 to B8 into which the plurality of terminals 50 are press-fitted, respectively.

[0033] A plurality of first contacts 40 are mounted on the board 30. The first contacts 40 can be brought into contact with a plurality of second contacts 410 (see FIG. 14) of the modular plug 400 when the modular plug 400 is inserted into the plug insertion port 23. A plurality of terminals 50 are mounted on the board 30 and electrically connected to the plurality of first contacts 40. A plurality of core wires W1 of the multi-core cable CB1 (see FIG. 17) can be connected to the plurality of terminals 50. More specifically, a plurality of (e.g., eight) first contacts 40 are mounted on the front lower surface of the board 30 in a line in the left-right direction. The modular plug 400 is provided with a plurality of second contacts 410 that correspond one-to-one to the plurality of first contacts 40 provided on the modular jack 1. A plurality of (e.g., eight) terminals 50 are mounted on the rear lower surface of the board 30 in two rows. The plurality of terminals 50 correspond one-to-one to the plurality of first contacts 40. A plurality of printed wirings E1 to E8 (see FIGS. 11 and 12) are formed on the surface of the substrate 30, electrically connecting between the plurality of terminals 50 and the plurality of first contacts 40. The printed wirings E1 to E8 are wirings made of a conductor layer formed on the surface of the substrate 30 using a printing technique.

[0034] In this embodiment, the number of the first contacts 40 is eight, and the eight first contacts 40 are assigned pin numbers from 1 to 8 in order from the left end. In FIG. 8, the numbers in parentheses attached to each of the first contacts 40 indicate the pin numbers assigned to the first contacts 40. The printed wirings E1 to E8 are formed to electrically connect the holes A1 to A8 into which the first contacts 40 No. 1 to No. 8 are press-fitted, respectively, and the holes B1 to B8 into which the eight terminals 50 corresponding to the first contacts 40 No. 1 to No. 8 are press-fitted, respectively. The inner surfaces of the holes A1 to A8 and the holes B1 to B8 are through-hole plated. Therefore, the first contacts 40 press-fitted into the holes A1 to A8, respectively, and the terminals 50 press-fitted into the holes B1 to B8, respectively, are electrically connected via the printed wirings E1 to E8.

[0035] In this embodiment, four pairs of wires are electrically connected to the set of the first and second first contacts 40, the set of the third and sixth first contacts 40, the set of the fourth and fifth first contacts 40, and the set of the seventh and eighth first contacts 40. Therefore, four pairs of wires are electrically connected to the set of printed wiring E1, E2, the set of printed wiring E3, E6, the set of printed wiring E4, E5, and the set of printed wiring E7, E8.

[0036] Here, in order to improve the balance of the two printed wirings connected to one pair of wires, it is preferable to make the wiring lengths of the two printed wirings equal. However, since the substrate 30 has a plurality of printed wirings E1 to E8 that connect between the plurality of first contacts 40 and the plurality of terminals 50, it is possible that the two printed wirings connected to one pair of wires cannot be made to have the same length. For example, in the case of the two printed wirings E7 and E8 that are connected to the pair of the 7th and 8th first contacts 40, the distance between the hole A8 and the hole B8 is shorter than the distance between the hole A7 and the hole B7. Therefore, if the printed wiring E7 connects between the hole A7 and the hole B7 at the shortest distance, and the printed wiring E8 connects between the hole A8 and the hole B8 at the shortest distance, the length of the printed wiring E8 is shorter than that of the printed wiring E7, and the balance may decrease.

[0037] Therefore, in this embodiment, in order to improve the balance of the printed wiring E7, E8, the printed wiring E8 is composed of two branch wirings E81, E82 (see Figs. 11, 12 and 13) whose both ends are electrically connected. The branch wiring E81 formed on the lower surface of the substrate 30 is a printed wiring that detours in a U-shape in order to provide a balanced line section E811 that extends parallel to the printed wiring E7 at a constant distance L10, rather than connecting between the hole A8 and the hole B8 at the shortest distance. As a result, the first wiring (printed wiring E7) and the second wiring (printed wiring E8) are provided with balanced line sections E711, E811 that extend parallel to the printed wiring E7 at a constant distance L10, and the capacitance component and inductance component between the first wiring and the second wiring can be adjusted, and the transmission performance required by the CAT6A standard, for example, can be realized. In FIG. 11, balanced line portions E711 and E811 provided on the printed wirings E7 and E8, respectively, are indicated by dots.

[0038] Also, as shown in FIG. 12, in order to extend the wiring length of the branch wiring E82 formed on the upper surface of the substrate 30, the branch wiring E82 is composed of a wiring E821 that connects between the hole A8 and the through hole H1 provided on the right side of the hole A8, and a wiring E822 that connects between the hole B8 and the through hole H1.

[0039] In this way, the printed wiring E8 is composed of a plurality of branch wirings E81, E82, and the lengths and arrangements of the plurality of branch wirings E81, E82 are adjusted to equalize the resistance components, capacitance components, and inductive components of the printed wirings E7, E8, thereby improving the balance of the printed wirings E7, E8. This can reduce the reflection loss of signals passing through the printed wirings E7, E8, and can also reduce the possibility of signal crosstalk occurring between other paired wires, thereby achieving the transmission performance required by the CAT6A standard, for example. In other words, when the plurality of printed wirings E1 to E8 include a first wiring and a second wiring connected to two core wires W1 included in the paired wires, it is preferable that at least one of the first wiring and the second wiring includes a plurality of branch wirings whose both ends are electrically connected, and the balance of the first wiring and the second wiring can be adjusted. In this embodiment, when the printed wiring E7 is the first wiring and the printed wiring E8 is the first wiring, the second wiring, that is, the printed wiring E8, includes two branch wirings, but it may include three or more branch wirings. Furthermore, the printed wiring E7, which is the first wiring, may include multiple branch wirings, or both the printed wiring E7, which is the first wiring, and the printed wiring E8, which is the second wiring, may include multiple branch wirings. Furthermore, two printed wirings connected to two core wires included in another pair of wires may include multiple branch wirings, and this can be changed appropriately according to the layout of the printed wirings.

[0040] Moreover, it is preferable that a first comb-shaped wiring and a second comb-shaped wiring are provided on the substrate 30. The first comb-shaped wiring is electrically connected to a first printed wiring among the plurality of printed wirings E1 to E8. The second comb-shaped wiring is electrically connected to a second printed wiring connected to a pair of wires different from the pair of wires to which the first printed wiring is electrically connected, and is capacitively coupled to the first comb-shaped wiring.

[0041] FIG. 12 shows an example of comb-shaped wirings F1 to F81 formed on the substrate 30. In the illustrated example, the comb-shaped wiring F1 electrically connected to the printed wiring E1 is capacitively coupled to the comb-shaped wiring F31 electrically connected to the printed wiring E3. The comb-shaped wiring F2 electrically connected to the printed wiring E2 is capacitively coupled to the comb-shaped wiring F51 electrically connected to the printed wiring E5. The comb-shaped wiring F32 electrically connected to the printed wiring E3 is capacitively coupled to the comb-shaped wiring F52 electrically connected to the printed wiring E5, and the comb-shaped wiring F33 electrically connected to the printed wiring E3 is capacitively coupled to the comb-shaped wiring F43 electrically connected to the printed wiring E4. The comb-shaped wiring F41 electrically connected to the printed wiring E4 is capacitively coupled to the comb-shaped wiring F61 electrically connected to the printed wiring E6, and the comb-shaped wiring F42 electrically connected to the printed wiring E4 is capacitively coupled to the comb-shaped wiring F71 electrically connected to the printed wiring E7. In addition, the comb-shaped wiring F53 electrically connected to the printed wiring E5 is capacitively coupled to the comb-shaped wiring F62 electrically connected to the printed wiring E6. In addition, the comb-shaped wiring F63 electrically connected to the printed wiring E6 is capacitively coupled to the comb-shaped wiring F81 electrically connected to the printed wiring E8.

[0042] In this manner, a plurality of comb-shaped wirings F1 to F82 are provided on the substrate 30, and one of the two capacitively coupled comb-shaped wirings F1 to F82 is referred to as a first comb-shaped wiring, and the other of the two capacitively coupled comb-shaped wirings F1 to F82 is referred to as a second comb-shaped wiring. Each of the first comb-shaped wiring and the second comb-shaped wiring has a plurality of linear wiring portions arranged in parallel at a predetermined interval, and the first comb-shaped wiring and the second comb-shaped wiring are patterned so that the linear wiring portions of the first comb-shaped wiring and the linear wiring portions of the second comb-shaped wiring are meshed with each other, thereby forming a capacitance between the first comb-shaped wiring and the second comb-shaped wiring.

[0043] In this embodiment, a first comb-shaped wiring electrically connected to the first printed wiring and a second comb-shaped wiring electrically connected to a second printed wiring connected to a pair of wires different from the pair of wires to which the first printed wiring is electrically connected are provided, so that a capacitance can be formed between the two, and the possibility of signal crosstalk occurring between the two can be reduced. Therefore, according to this embodiment, a modular jack 1 with improved transmission performance can be provided, and the transmission performance required by the CAT6A standard can be realized. Note that, if the first comb-shaped wiring has a plurality of linear wiring portions arranged in parallel with a predetermined interval, the second comb-shaped wiring may have only one linear wiring portion inserted into the plurality of linear wiring portions of the first comb-shaped wiring. Also, if the second comb-shaped wiring has a plurality of linear wiring portions arranged in parallel with a predetermined interval, the first comb-shaped wiring may have only one linear wiring portion inserted into the plurality of linear wiring portions of the second comb-shaped wiring.

[0044] The first comb-shaped wiring and the second comb-shaped wiring are preferably formed on the surface of the substrate 30 opposite to the mounting surface on which the multiple first contacts 40 are mounted. Forming the first comb-shaped wiring and the second comb-shaped wiring collectively on one surface (e.g., the upper surface) of the substrate 30 has the advantage of facilitating pattern design.

[0045] The substrate 30 is held by the body 10 with the mounting surface on which the first contacts 40 and the terminals 50 are mounted facing downward.

[0046] The first contacts 40 are formed, for example, by pressing a metal plate.

[0047] Each of the first contacts 40 has a press-fit portion 41 that is press-fitted and fixed in a hole A1 to A8 provided in the substrate 30. The press-fit portions 41 of the first to eighth first contacts 40 are connected to the holes A1 to A8 of the substrate 30, respectively. The press-fit portion 41 is, for example, a press-fit terminal having a shape in which a hole is formed in the press-fit portion. When the press-fit portion 41 is press-fitted into the holes A1 to A8 of the substrate 30, the press-fit portion 41 is deformed so that the hole of the press-fit portion 41 is crushed, and the first contact 40 can be firmly fixed to the substrate 30. In this embodiment, the shape of the holes A1 to A8 is, for example, an oval. Since the holes A1 to A8 are elliptical, the corners of the press-fit portion 41 come into contact with the inner surface of the elliptical hole A1 to A8, making the press-fit portion 41 even less likely to rotate and the tip side of the contact spring portion 42 less likely to shift position, compared to when the holes A1 to A8 are circular. This has the advantage of stabilizing the electrical connection state between the multiple first contacts 40 and the multiple second contacts 410. Note that in this embodiment, the holes A1 to A8 are elliptical with rounded corners, for example, but the holes A1 to A8 may be elliptical as long as they are not circular, and the shape can be changed as appropriate.

[0048] Each of the first contacts 40 has a pair of protrusions 411 that protrude in opposite directions from the base of the press-fit portion 41 along a direction intersecting the press-fit direction. When the press-fit portion 41 is press-fitted and fixed in the holes A1 to A8, the pair of protrusions 411 can contact the surface of the substrate 30. The pair of protrusions 411 protruding from the base of the press-fit portion 41 contact the surface of the substrate 30, which has the advantage that the orientation of the press-fit portion 41 is less likely to shift, and the position of the tip side of the contact spring portion 42 is less likely to shift.

[0049] Each of the first contacts 40 has a contact spring portion 42 electrically connected to a second contact 410 of the modular plug 400. An L-shaped bent portion 421 protruding downward is provided at a middle portion in the front-rear direction of the contact spring portion 42. When the modular plug 400 is inserted into the plug insertion port 23, the second contact 410 of the modular plug 400 and the bent portion 421 of the first contact 40 are configured to be electrically connected.

[0050] Here, the multiple first contacts 40 include multiple (e.g., three) third contacts 43 and multiple (e.g., five) fourth contacts 44. Each of the multiple third contacts 43 is connected to the board 30 at a connection position close to the plug insertion port 23 with respect to the contact portion (bent portion 421) with the second contact 410. The multiple fourth contacts 44 are connected to the board 30 at a connection position opposite the plug insertion port 23 with respect to the contact portion (bent portion 421) with the second contact 410. In other words, each of the multiple (e.g., three) third contacts 43 is fixed to the board 30 by pressing the press-in portion 41 arranged on the front side with respect to the bent portion 421 into the holes A3, A5, and A7 of the board 30. Each of the multiple (e.g., three) third contacts 43 protrudes rearward from the connection position with the board 30. Each of the multiple (e.g., five) fourth contacts 44 is fixed to the substrate 30 by pressing the press-fit portion 41 arranged on the rear side of the bent portion 421 into the holes A1, A2, A4, A6, and A8 of the substrate 30. Each of the multiple (e.g., five) fourth contacts 44 protrudes forward from the connection position with the substrate 30 and protrudes in the opposite direction to the multiple third contacts 43. When the multiple first contacts 40 are connected to the substrate 30 on the side closer to the plug insertion port 23 or on the opposite side with respect to the contact portion with the second contact 410 (bent portion 421), if the position where some of the first contacts 40 are connected to the substrate 30 is made different from the position where the other first contacts 40 are connected to the substrate 30, the length of some of the first contacts 40 will be different from the length of the other first contacts 40. In contrast, in this embodiment, the multiple third contacts 43 are fixed to the substrate 30 at a connection position closer to the plug insertion port 23 than the contact portion with the second contact 410, and the multiple fourth contacts 44 are connected to the substrate 30 at a connection position on the opposite side of the plug insertion port 23 than the contact portion with the second contact 410, so that the lengths of the multiple third contacts 43 and the multiple fourth contacts 44 can be set to be approximately the same. Therefore, there is an advantage that the capacitance component generated between the multiple third contacts 43 and the multiple fourth contacts 44 can be reduced, and signal crosstalk can be reduced.

[0051] Thus, in this embodiment, the connection position where the multiple third contacts 43 are connected to the substrate 30 is different in the front-rear direction from the connection position where the multiple fourth contacts 44 are connected to the substrate. In addition, two of the multiple fourth contacts 44 are located at both ends in the arrangement direction (for example, the left-right direction) of the multiple first contacts 40. The connection positions of the two fourth contacts 44 located at both ends among the multiple fourth contacts 44 and the connection positions of the fourth contacts 44 other than the two fourth contacts 44 located at both ends among the multiple fourth contacts 44 are different in the front-rear direction. Specifically, the connection position where the multiple third contacts 43 are connected to the substrate 30 and the connection position where the multiple fourth contacts 44 are connected to the substrate 30 are different in the front-rear direction. In addition, the connection positions where the two fourth contacts 44 located at both ends of the multiple fourth contacts 44 are connected to the substrate 30 and the connection positions where the remaining three fourth contacts 44 are connected to the substrate 30 are different in the front-rear direction. In this way, by making the connection positions of some of the first contacts 40 and the connection positions of some of the other first contacts 40 different in the front-to-rear direction, there is an advantage that the work of pressing the first contacts 40 into the substrate 30 is easier to perform compared to when the connection positions of multiple first contacts 40 are the same in the front-to-rear direction.

[0052] In this embodiment, the third contacts 43 and the fourth contacts 44 are alternately arranged in a direction intersecting the front-rear direction. Here, the third contacts 43 connected to the board 30 at a connection position closer to the plug insertion port 23 than the contact portion with the second contact 410, and the fourth contacts 44 connected to the board 30 at a connection position opposite the plug insertion port 23 than the contact portion with the second contact 410 are alternately arranged in a direction intersecting the front-rear direction (left-right direction). Therefore, compared to a case where the connection positions at which the first contacts 40 are connected to the board 30 are the same in the front-rear direction, there is an advantage that the operation of pressing the third contacts 43 and the fourth contacts 44 into the board 30 is easier to perform.

[0053] In addition, in the arrangement direction of the multiple first contacts 40, the length of the two first contacts 40 located at both ends is set to a dimension longer than the length of the other first contacts 40. In other words, the length of the two fourth contacts 44 located at both ends among the multiple fourth contacts 44 is set to a dimension longer than the length of the fourth contacts 44 other than the two fourth contacts 44 located at both ends. In this embodiment, the first contacts 40 located at both ends in the arrangement direction (left and right direction) are fourth contacts 44, and the connection positions of the fourth contacts 44 located at both ends are farther from the contact position with the second contact 410 than the connection positions of the other three fourth contacts 44. Therefore, the length of the fourth contacts 44 located at both ends is longer than the length of the other three fourth contacts 44, and in this embodiment, it is longer than the length of the three third contacts 43. In this way, the first contacts 40 (fourth contacts 44) located at both ends are longer than the other first contacts 40, so the spring constant of the first contacts 40 (fourth contacts 44) located at both ends can be reduced. When a 6-pole modular plug is erroneously inserted into the plug insertion port 23, the first contacts 40 (fourth contacts 44) located at both ends are likely to bend more significantly than when an 8-pole modular plug is connected to the plug insertion port 23. In this embodiment, the spring constants of the first contacts 40 (fourth contacts 44) located at both ends are set smaller than the other first contacts 40, so that even when a 6-pole modular plug is erroneously inserted, the possibility of plastic deformation of the first contacts 40 (fourth contacts 44) located at both ends can be reduced, and the reliability of the electrical connection with the second contacts 410 can be improved.

[0054] Here, the third contacts 43 and the fourth contacts 44 are alternately arranged in a direction intersecting the front-rear direction (for example, the left-right direction). More specifically, the fourth contacts 44 are arranged at both ends in the left-right direction, and three third contacts 43 and five fourth contacts 44 are mounted on the lower surface of the substrate 30 so that the third contacts 43 and the fourth contacts 44 are alternately arranged in the left-right direction. In this way, since the third contacts 43 and the fourth contacts 44 are alternately arranged in the left-right direction, there is an advantage that the pair of protrusions 411 protruding from the base of the press-fitting portion 41 are less likely to interfere with each other, making it easier to press-fit the first contacts 40.

[0055] Moreover, the modular jack 1 of this embodiment further includes a seat 60 disposed between the plurality of first contacts 40 and the board 30.

[0056] The base 60 is formed in a flat plate shape from an electrically insulating synthetic resin. A pair of protrusions 66 is provided on the upper surface of the base 60. The substrate 30 is provided with a pair of through holes 34 (see FIG. 8 ) into which the pair of protrusions 66 of the base 60 are respectively inserted. Thus, by inserting the pair of protrusions 66 of the base 60 into the pair of through holes 34 of the substrate 30, the base 60 is held in a position relative to the substrate 30. The base 60 is attached to the substrate 30 so as to be interposed between the plurality of first contacts 40 (including the plurality of third contacts 43 and the plurality of fourth contacts 44) and the substrate 30.

[0057] Three grooves 61 into which portions of the three third contacts 43 are respectively inserted are formed at the front end of the underside of the base 60. The base 60 is provided with through-holes 63 that penetrate the base 60 in the up-down direction at locations corresponding to the tips of the three third contacts 43, respectively.

[0058] In addition, five grooves 62 into which parts of the five fourth contacts 44 are respectively inserted are formed at the rear end of the lower surface of the base 60. Furthermore, the base 60 is provided with through-holes 64 penetrating the base 60 in the up-down direction at positions corresponding to the tip of the rightmost fourth contact 44 and the tip of the leftmost two fourth contacts 44 among the five fourth contacts 44. The through-holes 64 are formed by forming the corners of the base 60 into a notched shape. Furthermore, the base 60 is provided with through-holes 65 penetrating the base 60 in the up-down direction at positions corresponding to the tip of the second and third fourth contacts 44 from the right end among the five fourth contacts 44.

[0059] In this way, the base 60 is provided with a plurality of grooves 61, 62 corresponding one-to-one to the plurality of first contacts 40. In each of the plurality of grooves 61, 62, a part of the corresponding first contact 40 among the plurality of first contacts 40 is inserted. In the plurality of first contacts 40 (the plurality of third contacts 43 and the plurality of fourth contacts 44), a part of the contact spring portion 42 is inserted into the groove portion 61 or 62. More specifically, in each of the plurality of grooves 61, 62, in the corresponding first contact 40 among the plurality of first contacts 40, a part between the contact portion with the second contact 410 and the connection portion with the board 30 is inserted. In other words, in the contact spring portion 42 of the first contact 40, a part between the bent portion 421 and the press-fit portion 41 is inserted into the groove portion 61 or 62. In this way, since a part of the contact spring portion 42 is inserted into the groove portion 61 or 62, the position of the plurality of first contacts 40 is less likely to shift in the left-right direction. Therefore, the bent portions 421 of the multiple third contacts 43 and the multiple fourth contacts 44 are less likely to shift in the left-right direction, and the multiple third contacts 43 and the multiple fourth contacts 44 can be reliably brought into contact with the multiple second contacts 410.

[0060] Furthermore, the base 60 is provided with through-holes 63, 64, 65 penetrating the base 60 at locations where the tip portions of the multiple first contacts 40 face each other. Therefore, even if the multiple first contacts 40 (including the multiple third contacts 43 and the multiple fourth contacts 44) are bent toward the base 60 by contacting the multiple second contacts 410, respectively, the possibility that the tip portions of the multiple first contacts 40 will come into contact with the base 60 and be deformed can be reduced.

[0061] In this embodiment, the portion of the base 60 that supports the multiple third contacts 43 and the portion that supports the multiple fourth contacts 44 are integrated together, so that the contact area with the substrate 30 can be increased and misalignment of the base 60 can be suppressed compared to when the portion that supports the multiple third contacts 43 and the portion that supports the multiple fourth contacts 44 are provided separately.

[0062] Each of the terminals 50 includes a press-fit terminal that is press-fitted into the holes B1 to B8 of the substrate 30. Each of the terminals 50 has a press-fit slit 51 at the bottom. The press-fit slit 51 is formed in a bifurcated fork shape that is cut upward from the center of the lower side of the terminal 50. The inner edge of the bifurcated press-fit slit 51 is formed to be thinner toward the tip. Therefore, when the core wire W1 of the multi-core cable CB1 is arranged below the press-fit slit 51 of each terminal 50, and a pressing force is applied to the core wire W1 in a direction from the tip of the press-fit slit 51 toward the base, the insulating coating of the core wire W1 is cut at the inner edge of the press-fit slit 51, and the conductor portion of the core wire W1 introduced into the press-fit slit 51 is held in the press-fit slit 51. In short, by simply applying a pressing force from the lower end to the upper end of terminal 50 to core wire W1 while aligning core wire W1 with insulation displacement slit 51 of terminal 50 so as to extend in the thickness direction of terminal 50, the insulating coating of core wire W1 can be cut and the conductor portion of core wire W1 can be connected to terminal 50. This type of terminal structure is known as an IDC terminal.

[0063] The body 10 is, for example, a molded product made of insulating synthetic resin. The body 10 holds the substrate 30 and is attached to the cover 20. The substrate 30 is disposed on the upper surface of the body 10. The left and right edges of the body 10 are provided with support protrusions 19B and 19C that contact the side surfaces of the substrate 30 to position the substrate 30 in the left-right and front-rear directions. The left and right edges of the body 10 are provided with hooks 19A that hook onto the edge of the upper surface of the substrate 30 to position the substrate 30 in the up-down direction. Therefore, the support protrusions 19B and 19C contact the left and right side surfaces of the substrate 30 disposed on the upper surface of the body 10, and the hooks 19A hook onto the edge of the upper surface of the substrate 30, so that the substrate 30 is held in a positioned state relative to the body 10.

[0064] A flat insertion portion 17 is provided on the front side of the body 10 to be inserted into a recess 211 (see FIG. 3) provided on the upper part of the plug connection base 21. A plurality of slit-shaped through holes 171 are provided on the lower surface of the insertion portion 17 at positions corresponding to the plurality of first contacts 40, for inserting the plurality of first contacts 40. Therefore, when the substrate 30 is held by the body 10, each of the plurality of first contacts 40 protrudes downward from the corresponding through hole 171 (see FIG. 3). Note that the tip of the contact spring portion 42 of each of the plurality of first contacts 40 is caught on the edge of the through hole 171, thereby restricting the contact spring portion 42 from moving further downward.

[0065] Terminal holders 15A and 15B are provided at the rear of the body 10, protruding downward from both left and right sides. Four terminals 50 are inserted into each of the left and right terminal holders 15A and 15B. Each of the left and right terminal holders 15A and 15B has four insertion grooves 16 through which the pressure contact slits 51 of the four terminals 50 are exposed.

[0066] The body 10 has a recess 12 into which the end of the multi-core cable CB1 can be inserted through a lower opening 11. More specifically, the recess 12 into which the end of the multi-core cable CB1 can be inserted is formed between the left and right terminal holders 15A, 15B in the body 10. The space between the lower ends of the left and right terminal holders 15A, 15B serves as the opening 11 of the recess 12. For example, the end of the multi-core cable CB1 can be inserted into the recess 12 of the body 10 through the opening 11.

[0067] Further, at the rear of the left and right terminal holders 15A, 15B, a first protrusion 13 and a second protrusion 14 are provided side by side in the front-rear direction on each of a first side surface 111 (e.g., an inner side surface of the right terminal holder 15A) and a second side surface 112 (e.g., an inner side surface of the left terminal holder 15B) located on both sides of the opening 11. In other words, in the body 10, the first protrusion 13 and the second protrusion 14 that come into contact with the multi-core cable CB1 inserted into the accommodating space 121 from below are provided at an interval in the front-rear direction on each of the first side surface 111 and the second side surface 112 located on both the left and right sides of the opening 11.

[0068] Here, the interval L2 between the pair of second protrusions 14 provided on the first side surface 111 and the second side surface 112 is wider than the interval L1 between the pair of first protrusions 13 provided on the first side surface 111 and the second side surface 112. In this embodiment, the pair of first protrusions 13 and the pair of second protrusions 14 are arranged so that the pair of second protrusions 14, which are wider apart than the pair of first protrusions 13, are located rearward of the pair of first protrusions 13. In other words, the pair of first protrusions 13 are located forward of the pair of second protrusions 14. Since the pair of second protrusions 14 are located rearward of the pair of first protrusions 13, the multi-core cable CB1 having a large diameter can be temporarily held by the pair of second protrusions 14 located rearward.

[0069] Further, each of the pair of first protrusions 13 is provided with an inclined surface 13A such that the distance between the lower end portions is wider than the distance between the upper end portions. Each of the pair of second protrusions 14 is provided with an inclined surface 14A such that the distance between the lower end portions is wider than the distance between the upper end portions. In other words, each of the pair of first protrusions 13 is provided with an inclined surface 13A such that the distance between the end portions of the pair of first protrusions 13 on the opening 11 side is wider than the distance between the end portions of the pair of first protrusions 13 on the storage space 121 side. Further, each of the pair of second protrusions 14 is provided with an inclined surface 14A such that the distance between the end portions of the pair of second protrusions 14 on the opening 11 side is wider than the distance between the end portions of the pair of second protrusions 14 on the storage space 121 side. Therefore, when the outer sheath OS1 of the multi-core cable CB1 is pushed from the opening 11 toward the accommodating space 121, the outer sheath OS1 of the multi-core cable CB1 is guided into the accommodating space 121 along the inclined surface 13A or 14A, so that the task of pushing the multi-core cable CB1 into the accommodating space 121 can be easily performed.

[0070] Further, a pair of first clamping pieces 181 protruding in an arch shape are provided on the left and right inner walls of the body 10 above the pair of first projections 13. Further, a pair of second clamping pieces 182 protruding in an arch shape are provided on the left and right inner walls of the body 10 above the pair of second projections 14. That is, the body 10 is provided with a pair of first clamping pieces 181 and a pair of second clamping pieces 182 that clamp the multi-core cable CB1 arranged in the accommodation space 121 from both the left and right sides. That is, the body 10 is provided with a pair of first clamping pieces 181 that clamp the multi-core cable CB1 arranged in the accommodation space 121 from both the left and right sides, and a pair of second clamping pieces 182 that clamp the multi-core cable CB1 arranged in the accommodation space 121 from both the left and right sides. Furthermore, a distance L4 between the pair of second clamping pieces 182 is wider than a distance L3 between the pair of first clamping pieces 181. Here, the pair of first clamping pieces 181 are located forward of the pair of second clamping pieces 182. Furthermore, the distance L3 between the pair of first clamping pieces 181 is wider than the distance L1 between the pair of first protrusions 13, and the distance between the pair of second clamping pieces 182 is wider than the distance L2 between the pair of second protrusions 14.

[0071] In this manner, the body 10 is provided with a pair of first protrusions 13 and a pair of second protrusions 14 on the opening 11 side relative to the accommodation space 121 that accommodates the end of the multi-core cable CB1. Therefore, when the end of the multi-core cable CB1 is inserted into the accommodation space 121, the pair of first protrusions 13 or the pair of second protrusions 14 come into contact with the end of the multi-core cable CB1, thereby preventing the multi-core cable CB1 from coming out of the accommodation space 121.

[0072] Here, since the interval L1 between the pair of first protrusions 13 is narrower than the interval L2 between the pair of second protrusions 14, a plurality of types of multi-core cables CB1 with different diameters can be held by the pair of first protrusions 13 or the pair of second protrusions 14. For example, the diameter of the multi-core cable CB1 conforming to the CAT6A standard is larger than that of the multi-core cable CB1 conforming to the CAT5 or CAT6 standard. The interval L1 between the pair of first protrusions 13 is set to a dimension smaller than the diameter of the multi-core cable CB1 conforming to the CAT5 or CAT6 standard. In addition, the interval L2 between the pair of second protrusions 14 is set to a dimension larger than the diameter of the multi-core cable CB1 conforming to the CAT5 or CAT6 standard and smaller than the diameter of the multi-core cable CB1 conforming to the CAT6A standard. Therefore, when the multi-core cable CB1 conforming to the CAT5 or CAT6 standard is connected to the modular jack 1, the multi-core cable CB1 can be held by the pair of first protrusions 13. Furthermore, when a multi-core cable CB1 conforming to the CAT6A standard is connected to the modular jack 1, the multi-core cable CB1 can be held by the pair of second protrusions 14. As a result, the modular jack 1 of the present embodiment can hold a plurality of types of multi-core cables CB1 having different diameters, improving the workability of connecting multi-core cables CB1 having a plurality of types of diameters.

[0073] (2.1.2) Wiring devices A wiring device 300 including the above-described modular jack 1 will be described with reference to FIGS. 14 to 16 and other figures.

[0074] The wiring device 300 includes a modular jack 1 and an adapter 100 that holds the modular jack 1 and is attachable to a mounting member (e.g., a mounting frame 500) for mounting the wiring device 300 to an installation surface 600. The wiring device 300 further includes a door block 150 for opening and closing the plug insertion port 23.

[0075] The adapter 100 is a molded product made of synthetic resin, which is an electrically insulating material.

[0076] The adapter 100 includes a rectangular front frame portion 101 into which the plug connection base 21 of the modular jack 1 is inserted, and a cover portion 102 extending rearward from the upper surface portion of the front frame portion 101.

[0077] The front frame 101 is formed in a square tube shape penetrating in the front-rear direction. The left and right inner surfaces of the front frame 101 are provided with engagement grooves 103 into which the locking claws 25 provided on the left and right side surfaces of the plug connection base 21 are hooked. When the plug connection base 21 of the modular jack 1 is inserted into the inside of the front frame 101 from the rear and the locking claws 25 are hooked in the engagement grooves 103, the rearward movement of the modular jack 1 is restricted. In addition, the protrusions 212 provided on the left and right side surfaces of the plug connection base 21 contact the step portions 104 provided on the left and right inner surfaces of the front frame 101 from the rear side, thereby restricting the forward movement of the modular jack 1. In addition, the top, bottom, left and right side surfaces of the plug connection base 21 contact the inner surfaces of the front frame 101, thereby positioning the plug connection base 21 in the left-right and up-down directions. As a result, the modular jack 1 is held by the front frame 101 of the adapter 100 with its movement restricted in the front-rear, left-right, and up-down directions. When the modular jack 1 is held by the front frame 101 of the adapter 100, the upper surface of the rear part of the modular jack 1 is in contact with the lower surface of the cover 102.

[0078] Shoulders 105 are provided on the left and right outer surfaces of the front frame portion 101, protruding outward from positions slightly set back from the front surface of the front frame portion 101. Each of the left and right shoulders 105 is provided with a pair of mounting claws 106 for mounting to the mounting frame 500.

[0079] A door block 150 having doors 155 and 156 for opening and closing the plug insertion port 23 of the modular jack 1 is attached to the front surface of the front frame portion 101 .

[0080] The door block 150 has a flat box-shaped main body 151 with an open rear face. The main body 151 has a rectangular front wall 152 and side walls 153 protruding rearward from the four sides of the front wall 152.

[0081] A pair of engagement hooks 160 protruding rearward is provided on each of the left and right side walls 153. The door block 150 is attached to the front side of the adapter 100 by fitting the pair of engagement hooks 160 provided on each of the left and right side walls 153 into the pair of engagement holes 107 provided on the left and right sides of the front frame portion 101.

[0082] A plug insertion port 154 into which a modular plug 400 can be inserted is provided in a position overlapping with the plug insertion port 23 of the modular jack 1 in the front-rear direction on the front wall 152 of the door block 150. The door block 150 has two door bodies 155, 156 that open and close the plug insertion port 154. The two door bodies 155, 156 are held by the door block 150 in a state in which they can slide in the up-down direction. The lower door body 156 is disposed behind the upper door body 155. The lower door body 156 is provided with a protrusion 157 that protrudes forward. A downward pressing force is applied to the lower door body 156 by a coil spring provided in the door block 150.

[0083] When the lower door body 156 slides downward due to the spring force of the coil spring, the upper door body 155 is pulled by the lower door body 156 and also slides downward, and the plug insertion port 154 is closed by the two door bodies 155, 156. By closing the plug insertion port 154 with the two door bodies 155, 156, entry of foreign matter, dust, etc. into the plug insertion port 23 is suppressed.

[0084] When protrusion 157 of lower door body 156 is pushed upward, lower door body 156 slides upward, and when protrusion 157 abuts upper door body 155, upper door body 155 also slides upward. When door bodies 155, 156 are slid upward until protrusion 157 abuts the upper edge of plug insertion port 154, plug insertion port 154 is entirely opened, and modular plug 400 can be inserted into plug insertion port 23 of modular jack 1 through plug insertion port 154.

[0085] The cap 70 is provided for connecting the multiple core wires W1 of the multi-core cable CB1 to the insulation displacement slits 51 of the multiple terminals 50, respectively.

[0086] Eight pressing pieces 71 are provided on the upper surface of the cap 70 at positions facing the terminal holders 15A and 15B, respectively, which can be inserted into the four insertion grooves 16 provided in each of the terminal holders 15A and 15B. Each of the eight pressing pieces 71 is provided with a groove 72 into which the tip (lower end) of the terminal 50 is inserted.

[0087] Further, a clip lever 73 is provided on each of the left and right side portions of the cap 70. An engagement hole 74 is provided at the top of the clip lever 73, and a knob portion 75 is provided at the bottom of the clip lever 73. The clip lever 73 is supported by the cap 70 via a hinge 76 provided at the middle portion in the up-down direction, and the distance between the lower ends of the left and right clip levers 73 is variable. In other words, when an external force is applied to bring the left and right knob portions 75 closer together by pinching the knob portions 75 of the left and right clip levers 73 with fingers, the distance between the upper ends of the left and right clip levers 73 increases, and when the external force is removed, the elasticity of the hinge 76 returns the distance between the upper ends of the left and right clip levers 73 to the original value.

[0088] Protrusions 81 provided on the outer surfaces of terminal holders 15A and 15B of body 10 can be inserted into locking holes 74 provided in clip lever 73. When cap 70 is pressed against terminal holders 15A and 15B with eight pressing pieces 71 provided on cap 70 inserted into insertion grooves 16, four of which are provided on terminal holders 15A and 15B, protrusions 81 fit into locking holes 74, and cap 70 is held by body 10. When cap 70 is held by body 10, pressing pieces 71 prevent core wire W1 from floating up, thereby preventing core wire W1 from coming off.

[0089] To remove the cap 70 attached to the body 10, pinch the knob portions 75 of the left and right clip levers 73 with your fingers to reduce the distance between them, which will disengage the locking holes 74 from the protrusions 81, making it possible to remove the cap 70 from the body 10.

[0090] Further, the cap 70 is formed with a pushing piece 77 which is inserted into a portion of the recess 12 that does not interfere with the multi-core cable CB1 when the cap 70 is attached to the body 10. The pushing piece 77 is insertable into the insertion groove 16, has a larger protruding dimension than the pressing piece 71, and has a groove 78 which is deeper than the groove 72 formed in the pressing piece 71. After the core wire W1 of the multi-core cable CB1 is inserted into the insertion groove 16, the pushing piece 77 pushes the core wire W1 deeply into the insertion groove 16, whereby the insulating coating of the core wire W1 is cut by the insulation displacement slit 51 of the terminal 50, and the conductor portion of the core wire W1 is pressed against the insulation displacement slit 51 of the terminal 50.

[0091] (2.1.3) Mounting frame The mounting frame (mounting member) 500 is a mounting frame for a large rectangular interconnection wiring device standardized by, for example, JIS C 8375. The mounting frame 500 shown in Figs. 14 and 15 is a three-unit (one-unit type) mounting frame used when mounting a large rectangular interconnection wiring device to a construction surface 600. The mounting frame 500 is made of synthetic resin and is formed into a rectangular frame shape with left and right side edges 502, 503, an upper side edge 504 connecting the upper ends of the left and right side edges 502, 503, and a lower side edge 505 connecting the lower ends of the left and right side edges 502, 503. The left and right side edges 502, 503 are provided with three pairs of engagement holes 510 each, which engage with a pair of mounting claws 106 provided on the left and right shoulder parts 105 of the adapter 100. Also, for example, the right side 502 is formed with a flexible piece 506 that can bend so as to change the distance between it and the left side 503 .

[0092] The upper side 504 and the lower side 505 are provided with elongated holes 511 for passing fixing screws (not shown) that connect the mounting frame 500 to a switch box embedded in the construction surface 600. The upper side 504 and the lower side 505 are also provided with screw holes 512 for screwing in plate screws (not shown) that connect a decorative plate (not shown) that covers the front surface of the mounting frame 500. When the decorative plate is attached to the mounting frame 500, the front wall 152 of the door block 150 is exposed from the central hole of the decorative plate.

[0093] (2.2) Modular jack and wiring device assembly method A method for assembling the modular jack 1 will now be described.

[0094] The base 60 is attached to the lower surface of the substrate 30 by inserting the pair of projections 66 of the base 60 from below into the pair of through holes 34 of the substrate 30 .

[0095] Then, the first contacts 40 are press-fitted into the holes A1 to A8 of the board 30, respectively, and the terminals 50 are press-fitted into the holes B1 to B8, respectively, thereby fixing the terminals 50 and the first contacts 40 to the board 30. At this time, the press-fit portions 41 of the three third contacts 43 among the first contacts 40 are press-fitted into the three holes A3, A5, and A7 provided on the board 30 on the front side of the mounting position of the base 60, and the bases of the three third contacts 43 are inserted into the grooves 61 of the base 60. Furthermore, the press-fit portions 41 of the five fourth contacts 44 among the first contacts 40 are press-fitted into the five holes A1, A2, A4, A6, and A8 provided on the board 30 on the rear side of the mounting position of the base 60, and the bases of the five fourth contacts 44 are inserted into the grooves 62 on the rear side of the base 60.

[0096] Next, the board 30 is placed on the upper surface of the body 10 with the surface on which the terminals 50 and the first contacts 40 are mounted facing downward. At this time, the support protrusions 19B, 19C provided on both the left and right sides of the body 10, two of which are provided, come into contact with the step portions 32, 33 provided on the left and right side surfaces of the board 30, so that the board 30 is positioned relative to the body 10 in the front-rear and left-right directions. Also, the hooks 19A provided on both the left and right sides of the body 10 are hooked on the upper end portions of the left and right side surfaces of the board 30, so that the board 30 is positioned relative to the body 10 in the up-down direction. As a result, the board 30 is held by the body 10. When the board 30 is held by the body 10, the first contacts 40 protrude downward from the through holes 171 provided in the body 10. Furthermore, when the substrate 30 is held by the body 10, the four terminals 50 provided on the right side of the substrate 30 are inserted into the right terminal holder 15A, and the four terminals 50 are disposed at positions corresponding to the four insertion grooves 16. Moreover, the four terminals 50 provided on the left side of the substrate 30 are inserted into the left terminal holder 15B, and the four terminals 50 are disposed at positions corresponding to the four insertion grooves 16.

[0097] Next, with the top surface of the board 30 in contact with the rail piece 26 provided on the bottom surface of the body holding base 22, the body 10 holding the board 30 is moved forward, and the insertion portion 17 of the body 10 is inserted into the recess 211 of the plug connection base 21. When the insertion portion 17 is pushed into a predetermined position in the recess 211, the protrusions 28 of the flexible pieces 27 provided on the left and right sides of the plug connection base 21 climb over the support protrusions 19B of the body 10 and are caught by the support protrusions 19B, thereby restricting the rearward movement of the body 10. In addition, steps 172 are provided on both the left and right sides of the bottom surface of the insertion portion 17, and these steps 172 come into contact with corners 213 provided on the left and right inner walls of the plug connection base 21, thereby restricting the movement of the insertion portion 17 in the up-down and left-right directions. Furthermore, a protrusion 19D that protrudes forward is provided at the upper end of the support protrusion 19C of the body 10, and when the insertion portion 17 is pushed into a predetermined position in the recess 211, the protrusion 19D is inserted into a holding groove 29 provided at the rear of the body holding base 22, thereby restricting movement of the body 10 in the up-down and left-right directions. This brings the body 10 into a state where it is attached to the cover 20.

[0098] Here, a first fitting portion is constituted by the projection 19D and the step portion 172, etc., and a second fitting portion is constituted by the holding groove 29 into which the projection 19D is inserted and the corner portion 213 with which the step portion 172 comes into contact, etc. In this manner, the body 10 and the cover 20 are joined by fitting the first fitting portion provided on the body 10 with the second fitting portion provided on the cover 20. Note that in this embodiment, the first fitting portion is constituted by the projection 19D and the step portion 172, etc., and the second fitting portion is constituted by the holding groove 29 and the corner portion 213, etc., but the configurations of the first fitting portion and the second fitting portion can be changed as appropriate.

[0099] In addition, when the body 10 and the cover 20 are joined together, the left and right side walls 221 of the body holding base 22 are in contact with the upper surfaces of the terminal holding bases 15A and 15B of the body 10. The left and right side walls 221 become abutment parts that come into contact with a part of the body 10 when the body 10 and the cover 20 are joined together. In addition, protrusions 222 having a predetermined width in the left-right direction protrude downward from the left and right side walls 221, and the protrusions 222 are in contact with the front end surfaces of the terminal holding bases 15A and 15B. That is, in a state in which the body 10 and the cover 20 are joined together, the cover 20 is provided with abutment parts (the side walls 221 in this embodiment) that come into contact with a part of the body 10, and a protrusion 222 that protrudes from the abutment parts and comes into contact with the end of the body 10. In this manner, the cover 20 is provided with the protruding portion 222 of a predetermined width protruding from the abutment portion, and the protruding portion 222 is in contact with the front end portion of the terminal holding base 15A, 15B of the body 10, so that the strength of the cover 20 can be increased. Therefore, even if an external force is applied to the multi-core cable CB1 connected to the modular jack 1, which generates an external force that pushes the rear portion of the body 10 downward, and this external force is applied to the cover 20, the abutment portion and the protruding portion 222 can receive the external force applied from the body 10, and deformation of the cover 20 can be suppressed. In this embodiment, the abutment portion is formed by the left and right side walls 221 of the body holding base 22, and the protruding portion 222 is formed by the protruding portion 222 protruding downward from the left and right side walls 221, but the configuration of the abutment portion and the protruding portion 222 can be appropriately changed.

[0100] In addition, it is preferable that the corners between the contact portions and the protruding portions of the cover 20 are rounded. That is, it is preferable that the corners between the side wall 221, which is the contact portion, and the protruding portion 222, which is the protruding portion, of the cover 20 are rounded, and the possibility of stress concentrating on the corners between the side wall 221 and the protruding portion 222 can be reduced.

[0101] In this embodiment, the body 10 and the cover 20 are provided with fitting portions on both the front and rear sides of the protruding portion 222. For example, the first fitting portion includes a first fitting structure formed by the protrusion 19D and a second fitting structure formed by the step portion 172. The second fitting portion includes a third fitting structure formed by the holding groove 29 that fits with the protrusion 19D and a fourth fitting structure formed by the corner portion 213 that fits with the step portion 172. That is, the first fitting portion includes the first fitting structure and the second fitting structure, and the second fitting portion includes a third fitting structure that fits with the first fitting structure and a fourth fitting structure that fits with the second fitting structure. Then, when the body 10 and the cover 20 are joined together, the protruding portion 222 is located between the first fitting structure and the third fitting structure and the second fitting structure and the fourth fitting structure. Even if an external force is applied from the body 10 to the cover 20 as a result of the application of an external force to the multi-core cable CB1 connected to the modular jack 1, the cover 20 is not easily deformed, which has the advantage that the connection between the body 10 and the cover 20 is not easily released. Note that the first fitting structure, the second fitting structure, the third fitting structure, and the fourth fitting structure are not limited to the above configurations and can be modified as appropriate.

[0102] Then, with the eight pressing pieces 71 of the cap 70 inserted into the insertion grooves 16, four of which are provided in each of the terminal holding bases 15A and 15B, the cap 70 is pressed against the terminal holding bases 15A and 15B, so that the protrusions 81 fit into the locking holes 74, and the cap 70 is attached to the body 10.

[0103] Next, a method of assembling the wiring device 300 including the modular jack 1 will be described.

[0104] When the plug connection base 21 of the modular jack 1 is inserted into the front frame 101 of the adapter 100 from the rear side, the top, bottom, left and right side surfaces of the plug connection base 21 come into contact with the inner walls of the front frame 101, restricting movement of the plug connection base 21 in the up-down and left-right directions. Then, when the plug connection base 21 is moved to a predetermined position on the front frame 101, the left and right locking claws 25 of the plug connection base 21 get caught in engagement grooves 103 provided on the left and right inner walls of the front frame 101, restricting rearward movement of the plug connection base 21. This brings the modular jack 1 into a state of being held by the adapter 100.

[0105] Then, when door block 150 is brought close to front frame portion 101 of adapter 100 from the front and the four engaging hooks 160 are aligned with the four fitting holes 107, door block 150 is pushed into front frame portion 101, whereby engaging hooks 160 are inserted into fitting holes 107. At this time, engaging hooks 160 are caught on the edges of fitting holes 107, so that door block 150 is fixed to front frame portion 101, and assembly of wiring device 300 is completed.

[0106] (2.3) How to connect a multi-core cable to a modular jack A method of connecting a plurality of core wires W1 of a multi-core cable CB1 to a plurality of terminals 50 of a modular jack 1 will be described below.

[0107] When connecting multiple core wires W1 of a multi-core cable CB1 to multiple terminals 50 of a modular jack 1, the outer sheath OS1 of the tip portion of the multi-core cable CB1 is stripped to expose multiple (e.g., eight) core wires W1, as shown in Fig. 17. In addition, the cap 70 is removed from the body 10 to expose the insertion grooves 16, four of which are provided in each of the terminal holders 15A and 15B.

[0108] When an end of the outer sheath OS1 of the multi-core cable CB1 is pushed into the recess 12 from the opening 11 of the body 10, the outer sheath OS1 passes over the pair of first protrusions 13 or the pair of second protrusions 14 and enters the recess 12. At this time, the pair of first protrusions 13 or the pair of second protrusions 14 come into contact with the outer sheath OS1 of the multi-core cable CB1, so that the multi-core cable CB1 is temporarily held in the body 10.

[0109] With the multi-core cable CB1 temporarily held in the body 10, the four pairs of eight core wires W1 are inserted into the four insertion grooves 16 provided in each of the left and right terminal holders 15A and 15B. Each core wire W1 is inserted into the insertion groove 16 so as to extend along the thickness direction of the terminal 50 arranged in the insertion groove 16.

[0110] With one core wire W1 inserted into each of the eight insertion grooves 16, when the pushing piece 77 of the cap 70 pushes the core wire W1 one by one from the tip side to the base end side of the insulation displacement slit 51, the insulating coating of the core wire W1 is cut by the inner edge of the insulation displacement slit 51, and the conductor portion of the core wire W1 introduced into the insulation displacement slit 51 is held in the insulation displacement slit 51. When the pushing piece 77 of the cap 70 pushes all of the core wires W1 from the tip side to the base end side of the insulation displacement slit 51, all of the core wires W1 are connected to the corresponding terminals 50. With the core wires W1 connected to each of the multiple terminals 50, when the eight pressing pieces 71 on the cap 70 are inserted into the insertion grooves 16, four of which are provided on each of the terminal holders 15A and 15B, the cap 70 is pressed against the terminal holders 15A and 15B, the projections 81 fit into the locking holes 74, and the cap 70 is held by the body 10. By holding the cap 70 by the body 10, the possibility that the multiple core wires W1 connected to the multiple terminals 50 will come off the corresponding terminals 50 can be reduced.

[0111] (2.4) How to attach the wiring device to the installation surface A method of mounting wiring device 300 with multi-core cable CB1 connected to modular jack 1 on a construction surface using mounting frame 500 will be described.

[0112] When attaching the wiring device 300 to the mounting frame 500, the pair of mounting claws 106 on the left side of the adapter 100 are inserted into the engagement holes 510 on the left side edge 503 from the rear of the mounting frame 500. When the right side of the adapter 100 is pushed forward with the left mounting claws 106 inserted into the engagement holes 510 on the side edge 503, the deflection piece 506 is pushed by the pair of mounting claws 106 on the right side of the adapter 100 and deflects, whereby the pair of mounting claws 106 on the right side of the adapter 100 engage with the engagement holes 510 on the right side edge 502. As a result, the pairs of mounting claws 106 provided on the left and right side surfaces of the adapter 100 engage with the respective pairs of engagement holes 510 on the sides 502 and 503, and the modular jack 1 is attached to the mounting frame 500. In this attached state, the front surface of door block 150 attached to the front side of adapter 100 protrudes forward from opening 501 surrounded by side edges 502, 503, upper edge 504, and lower edge 505.

[0113] When connecting modular plug 400 to modular jack 1, for example, the tip of modular plug 400 pushes protrusion 157 of door body 156 upward to move doors 155, 156 upward and open plug insertion port 154. When modular plug 400 is inserted into plug insertion port 23 of modular jack 1 through plug insertion port 154 with plug insertion port 154 open, multiple second contacts 410 of modular plug 400 are connected to multiple first contacts 40 of modular jack 1.

[0114] When removing the wiring device 300 from the mounting frame 500, the bending pieces 506 are bent outward by a tool inserted from the front between the bending pieces 506 and the side edges 502. When the bending pieces 506 are bent outward, the mounting claws 106 are released from the engagement holes 510 and come outward, so that the adapter 100 can be removed from the mounting frame 500.

[0115] (3) Modifications The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0116] In the above embodiment, three or more pairs of protrusions spaced apart from one another may be provided as protrusions that come into contact with the multi-core cable CB1 arranged in the housing space 121 from the opening 11 side.

[0117] In the above embodiment, as the clamping pieces that clamp the multi-core cable CB1 arranged in the accommodating space 121 from both sides, three or more pairs of clamping pieces spaced apart from each other at different intervals may be provided.

[0118] In the embodiment, the modular jack 1 includes eight first contacts 40, but the number of first contacts 40 may be four or six, and may be changed as appropriate.

[0119] The wiring device of the above embodiment includes the door block 150 for opening and closing the plug insertion port 23, but the door block 150 is not an essential component and can be modified as appropriate.

[0120] In the above embodiment, the modular jack 1 is applied to a wiring device 300 that is attached to a construction surface such as a wall, but the modular jack 1 may also be applied to a communications rack that houses multiple patch panels on which multiple modular jacks 1 are mounted side by side.

[0121] (summary) The above-described embodiments and the like disclose the following aspects.

[0122] The modular jack (1) of the first embodiment includes a cover (20), a board (30), and a body (10). The cover (20) has a plug insertion opening (23) on the front side into which a modular plug (400) can be inserted. A plurality of first contacts (40) are mounted on the board (30). The body (10) holds the board (30) and is attached to the cover (20). The plurality of first contacts (40) are capable of contacting a plurality of second contacts (410) of the modular plug (400) when the modular plug (400) is inserted into the plug insertion opening (23). A plurality of terminals (50) are mounted on the board (30) and are electrically connected to the plurality of first contacts (40). A plurality of core wires (W1) of a multi-core cable (CB1) can be connected to the plurality of terminals (50). The body (10) has a storage space (121) into which an end of a multi-core cable (CB1) can be inserted through a lower opening (11). The body (10) has a first side surface (111) and a second side surface (112) located on both the left and right sides of the opening (11), and a first protrusion (13) and a second protrusion (14) arranged side by side in the front-rear direction, respectively, on each of the first side surface (111) and the second side surface (112) that come into contact from below with the multi-core cable (CB1) inserted into the storage space (121). The spacing between the second protrusions (14) provided on the first side surface (111) and the second side surface (112) is wider than the spacing between the first protrusions (13) provided on the first side surface (111) and the second side surface (112).

[0123] According to this embodiment, it is possible to hold a plurality of types of multi-core cables (CB1) having different diameters, and it is possible to improve the workability of the operation of connecting multi-core cables (CB1) having a plurality of types of diameters.

[0124] In the modular jack (1) of the second embodiment, the pair of first projections (13) are located forward of the pair of second projections (14) in the first embodiment.

[0125] According to this embodiment, the large-diameter multi-core cable (CB1) can be temporarily held by the pair of second projections (14) located on the rear side.

[0126] In the modular jack (1) of the third aspect, in the first or second aspect, each of the pair of first projections (13) is provided with an inclined surface (13A) such that the distance between the lower ends is wider than the distance between the upper ends. Each of the pair of second projections (14) is provided with an inclined surface (14A) such that the distance between the lower ends is wider than the distance between the upper ends.

[0127] According to this embodiment, when the end of the multi-core cable (CB1) is pushed into the storage space (121) from the opening (11), the multi-core cable (CB1) is guided into the storage space (121) along the inclined surfaces (13A, 14A), so that the task of pushing the multi-core cable (CB1) into the storage space (121) can be easily performed.

[0128] In a fourth aspect of the modular jack (1) in any of the first to third aspects, the body (10) is provided with a pair of first clamping pieces (181) and a pair of second clamping pieces (182) that clamp the multi-core cable (CB1) arranged in the housing space (121) from both the left and right sides. The distance (L4) between the pair of second clamping pieces (182) is wider than the distance (L3) between the pair of first clamping pieces (181).

[0129] According to this embodiment, it is possible to hold a plurality of types of multi-core cables (CB1) having different diameters, and it is possible to improve the workability of the operation of connecting multi-core cables (CB1) having a plurality of types of diameters.

[0130] In the modular jack (1) of the fifth embodiment, the pair of first clamping pieces (181) in the fourth embodiment are located forward of the pair of second clamping pieces (182).

[0131] According to this embodiment, the large-diameter multi-core cable (CB1) can be temporarily held by the pair of second clamping pieces (182) located on the rear side.

[0132] In the modular jack (1) of the sixth aspect, the distance (L3) between the pair of first clamping pieces (181) is wider than the distance (L1) between the pair of first projections (13) in the fourth or fifth aspect. The distance (L4) between the pair of second clamping pieces (182) is wider than the distance (L2) between the pair of second projections (14).

[0133] According to this embodiment, it is possible to hold a plurality of types of multi-core cables (CB1) having different diameters, and it is possible to improve the workability of the operation of connecting multi-core cables (CB1) having a plurality of types of diameters.

[0134] In the modular jack (1) of the seventh aspect, in any of the first to sixth aspects, the body (10) and the cover (20) are coupled together by engaging a first fitting portion (19D, 172) provided on the body (10) with a second fitting portion (29, 213) provided on the cover (20). In a state in which the body (10) and the cover (20) are coupled together, the cover (20) is provided with a contact portion (221) that comes into contact with a part of the body (10) and a protruding portion (222) that protrudes from the contact portion (221) and comes into contact with an end portion of the body (10).

[0135] According to this embodiment, when an external force is applied to the multi-core cable (CB1) connected to the modular jack (1), deformation of the cover (20) can be suppressed even if an external force is applied from the body (10) to the cover (20).

[0136] In the modular jack (1) of the eighth embodiment, in the seventh embodiment, the corners (223) between the abutting portion (221) and the protruding portion (222) of the cover (20) are rounded.

[0137] According to this embodiment, it is possible to reduce the possibility of stress being concentrated at the corner portion (223) between the contact portion (221) and the protrusion (222).

[0138] In the modular jack (1) of the ninth aspect, in the seventh or eighth aspect, the first mating portion (19D, 172) includes a first mating structure (19D) and a second mating structure (172). The second mating portion (29, 213) includes a third mating structure (29) that mates with the first mating structure (19D) and a fourth mating structure (213) that mates with the second mating structure (172). When the body (10) and the cover (20) are joined together, the protrusion (222) is located between the first mating structure (19D) and the third mating structure (29) and the second mating structure (172) and the fourth mating structure (213).

[0139] According to this embodiment, by suppressing deformation of the cover (20), it is possible to reduce the possibility of the connection between the body (10) and the cover (20) coming loose.

[0140] A wiring device (300) of a tenth aspect includes the modular jack (1) of any of the first to ninth aspects and an adapter (100). The adapter (100) holds the modular jack (1) and is attachable to a mounting member (500) for mounting the wiring device (300) on an installation surface (600).

[0141] According to this embodiment, it is possible to improve the workability of connecting multi-core cables (CB1) having a plurality of different diameters.

[0142] The configurations according to the second to ninth aspects are not essential to the modular jack (1) and may be omitted as appropriate. [Explanation of symbols]

[0143] 1 modular jack 10. Body 11 Opening 13 1st protrusion 13A Slope 14 2nd protrusion 14A Slope 19D Protrusion (first fitting portion, first fitting structure) 20 Cover 23 Plug insertion port 29 Retaining groove (second fitting portion, third fitting structure) 30 Substrate 40 First Contact 50 Terminals 100 Adapter 111 First aspect 112 Second aspect 121 Containment Space 172 Step portion (first fitting portion, second fitting structure) 181 1st clamping piece 182 Second clamping piece 213 Corner portion (second fitting portion, fourth fitting structure) 221 Side wall (contact part) 222 Protrusion 223 Corner 300 Wiring devices 400 Modular Plug 410 2nd Contact 500 Mounting frame (mounting parts) 600 Construction side CB1 multi-core cable L1 Distance between a pair of first protrusions L2 Distance between a pair of second protrusions L3 Distance between the pair of first clamping pieces L4 Distance between the pair of second clamping pieces W1 core wire

Claims

1. A cover having a plug insertion port on a front surface into which a modular plug can be inserted; a substrate on which a plurality of first contacts are mounted; a body that holds the substrate and is attached to the cover; the first contacts are capable of contacting the second contacts of the modular plug when the modular plug is inserted into the plug insertion port, a plurality of terminals are mounted on the substrate and electrically connected to the plurality of first contacts, respectively; A plurality of core wires of a multi-core cable can be connected to the plurality of terminals, respectively; the body has an accommodating space into which the end of the multi-core cable can be inserted through a lower opening; a first protrusion and a second protrusion are provided on each of a first side surface and a second side surface located on both the left and right sides of the opening, the first protrusion and the second protrusion are provided at a distance from each other in the front-rear direction and come into contact with the multi-core cable inserted into the accommodating space from below, a distance between the pair of second protrusions provided on the first side surface and the second side surface, respectively, is wider than a distance between the pair of first protrusions provided on the first side surface and the second side surface, Modular jack.

2. The pair of first protrusions are located forward of the pair of second protrusions.

2. The modular jack of claim 1.

3. Each of the pair of first projections is provided with an inclined surface such that the distance between the lower ends is wider than the distance between the upper ends, Each of the pair of second projections is provided with an inclined surface such that the distance between the lower ends is wider than the distance between the upper ends.

2. The modular jack of claim 1.

4. the body is provided with a pair of first clamping pieces and a pair of second clamping pieces that clamp the multi-core cable disposed in the accommodating space from both left and right sides, The distance between the pair of second clamping pieces is wider than the distance between the pair of first clamping pieces.

2. The modular jack of claim 1.

5. The pair of first clamping pieces is located forward of the pair of second clamping pieces.

5. The modular jack of claim 4.

6. The distance between the pair of first clamping pieces is wider than the distance between the pair of first projections, The distance between the pair of second clamping pieces is wider than the distance between the pair of second projections.

5. The modular jack of claim 4.

7. a first fitting portion provided on the body is fitted into a second fitting portion provided on the cover, thereby joining the body and the cover together; The cover is provided with a contact portion that contacts a part of the body when the body and the cover are joined together, and a protrusion that protrudes from the contact portion and contacts an end of the body.

2. The modular jack of claim 1.

8. The cover has corners between the contact portion and the protruding portion that are rounded.

8. The modular jack of claim 7.

9. the first fitting portion includes a first fitting structure and a second fitting structure, the second fitting portion includes a third fitting structure that fits with the first fitting structure and a fourth fitting structure that fits with the second fitting structure, When the body and the cover are coupled together, the protrusion is located between the first fitting structure and the third fitting structure and between the second fitting structure and the fourth fitting structure.

8. The modular jack of claim 7.

10. A modular jack according to any one of claims 1 to 9; and an adapter that holds the modular jack and is attachable to a mounting member for mounting the wiring device to an installation surface. Wiring equipment.

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