Housing

Abstract

To provide a housing of an electric connector that allows an operator to easily determine, by visual observation, whether core wire forming operations are executed according to the rule.SOLUTION: A housing 10 of the present invention is connected therein with an electric wire 31 accommodated in a receptacle case 100. The housing 10 is formed with a projection 12 that extends from a first surface 13 on a side from which the electric wire 31 is insert to the inside of the housing toward one side in a first direction. The dimension L from the first surface 13 of the projection 12 to a leading end 12A on one side of the projection 12 is larger than the diameter of the electric wire 31.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a housing for use in an electrical connector. [Background technology]

[0002] Electrical connectors for motors are required to be low-profile depending on the application the motor is installed in. The small parts of electrical connectors that support low-profile designs tend to use thinner materials, which can cause damage to the parts when subjected to a large load.

[0003] It is necessary to attach the housing, to which the core wires connected after the core wire forming process are connected, to the connector body without placing a large load on the small components of low-profile electrical connectors. However, if the core wires overlap or the dimensions of the core wires after the core wire forming process are not within the allowable range for accommodating the housing in the connector body, an attempt to forcibly attach the housing to the connector body can cause defects in the connector body or the housing. The core wire forming process and the process of attaching the housing to the connector body are dependent on the worker.

[0004] Patent Document 1 discloses an electrical connector in which the upper portion of a cable insertion opening provided in a housing is opened so that work on the cable can be performed through the opened portion. However, Patent Document 1 does not disclose the work of forming the core wire after connecting the cable to be inserted into the cable connector and the terminal housed in the cable connector. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-206501 Summary of the Invention [Problem to be solved by the invention]

[0006] In a low-profile electrical connector, if it becomes easier to determine whether the core wires are properly formed, the work of forming the core wires and attaching the housing to the connector body will become less dependent on the worker.

[0007] SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a housing for an electrical connector that allows easy visual inspection of whether or not the core wire forming operation has been carried out as specified. [Means for solving the problem]

[0008] The housing of the present invention is a housing that is accommodated in a receptacle case and has an electric wire connected therein, and has a protrusion that extends toward one side in a first direction from a first surface on the side where the electric wire is inserted inside, and the dimension from the first surface of the protrusion to the tip of one side of the protrusion is larger than the diameter of the electric wire.

[0009] The housing of the present invention preferably has at least two protrusions formed thereon, and the distance between the two protrusions is at least half the longitudinal dimension of the first surface.

[0010] In the housing of the present invention, the protrusions are preferably formed at the four corners of the first surface.

[0011] In the housing of the present invention, the projection preferably has a guide that protrudes outward from the first surface.

[0012] In the housing of the present invention, the guide preferably extends from the first surface to the other side in the first direction.

[0013] In the housing of the present invention, the dimension from the first surface of the protrusion to the tip of one side of the protrusion is preferably smaller than the dimension of the gap between the first surface facing the receptacle case and the receptacle case when the housing is housed in the receptacle case. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a housing for an electrical connector that allows easy visual determination of whether the core wire forming operation has been carried out as specified. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view showing a housing according to the embodiment of the present invention. [Figure 2] FIG. 2 is a side view showing a housing according to the embodiment of the present invention. [Figure 3] FIG. 2 is a plan view showing a housing according to the embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view showing a receptacle case according to the embodiment of the present invention. [Figure 5] FIG. 10 is a cross-sectional view of the core wire attached to the housing according to the embodiment of the present invention after forming operation. [Figure 6] 10 is a cross-sectional view showing a state in which the housing according to the embodiment of the present invention is being accommodated in the receptacle case. FIG. [Figure 7] 10 is a cross-sectional view showing a state in the middle of inserting the housing into the receptacle case according to the embodiment of the present invention. FIG. [Figure 8] 1 is a cross-sectional view of a housing according to an embodiment of the present invention when housed in a receptacle case. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, a housing 10 according to an embodiment of the present invention and a receptacle case 100 in which the housing 10 is accommodated will be described with reference to the accompanying drawings. For ease of explanation, as shown in the drawings, the direction in which the housing 10 and the receptacle case 100 are accommodated is referred to as a first direction Z, and the upward direction of the first direction Z is referred to as (U), the downward direction is referred to as (D), a second direction X perpendicular to the first direction Z, and a third direction Y perpendicular to the second direction X. The forward direction of the second direction X is referred to as (F), the rearward direction is referred to as (B), and the rightward direction of the third direction Y is referred to as (R) and the leftward direction is referred to as (L). [Housing 10: See Figures 1, 2, and 3] A cable 30 including, for example, a power core wire for supplying power to a servo motor, a brake core wire for operating a holding brake, and an encoder core wire for detecting the position of a drive unit is connected to the interior of the housing 10. After the housing 10 to which each core wire is connected is accommodated in a receptacle case 100, a terminal unit (not shown) is fitted and the housing 10 is connected to a connecting portion of the servo motor via the terminal unit. The housing 10 is formed as a single unit by injection molding an electrically insulating resin material. The cable 30 is composed of ten core wires 31 as electric wires, a filler (not shown) made of cotton thread or the like that surrounds the ten core wires 31, a braided shield (not shown) that covers the filler, and a sheath (not shown) that covers the braided shield. The filler, braided shield, and sheath are referred to as protective layers. The portion of the core wire 31 where the insulating covering has been removed and the conductive member is exposed is referred to as the core wire main body portion 32, and the covered portion is referred to as the core wire 31.

[0017] As shown in FIG. 1, the housing 10 is formed with a terminal accommodating portion 11 in which a crimp terminal 20 is accommodated as a terminal, and a protrusion 12 that serves as a criterion for determining whether the forming work of the core wire 31 has been performed as specified.

[0018] The protrusions 12 serve as a criterion for determining whether the forming work of the core wire 31 has been performed as specified, and also serve as a guide when the housing 10 is placed into the receptacle case 100. When the housing 10 is viewed from above, the protrusions 12 are formed at the four corners of the housing 10. The protrusions 12 extend from a first surface 13 on the upper side of the housing 10 in the first direction Z toward an upper U side, which is one side of the first direction Z.

[0019] The protrusions 12 have guides 14 that protrude outward from the first surface 13. The tip portions of the guides 14 on the upper U side in the first direction Z are chamfered 15 in the second direction X outside the housing 10. The four protrusions 12 have chamfered inclined surfaces 16 when viewed in a plan view. The guides 14 extend downward D from the first surface 13, which is the other side in the first direction Z.

[0020] The dimension L from the first surface 13 to the tip 12A of the projection 12 is larger than the diameter of any of the core wires 31 included in the cable 30. Furthermore, the distance between the two protrusions is at least half the dimension in the third direction Y, which is the longitudinal direction of the first surface 13. By setting the distance between the two protrusions to at least half the dimension in the longitudinal direction of the first surface 13, it becomes easier to visually determine whether the forming operation of the core wire 31 has been performed as specified. In this embodiment, the shape of the first surface 13 in a plan view is rectangular, and the dimension in the third direction Y is greater than the dimension in the second direction X, so the third direction Y is the longitudinal direction of the first surface 13. When the shape of the first surface 13 in a plan view is square or circular, for example, and the dimensions in the second direction X and the third direction Y are the same, the same dimension in the second direction X and the third direction Y is defined as the longitudinal dimension.

[0021] The crimp terminal 20 is crimped to a core body portion 32 of a core wire 31 of a cable 30 inserted into the receptacle case 100. A terminal unit (not shown) accommodating a plurality of terminals is fitted into the housing 10 from below D, and the terminals accommodated in the terminal unit and the crimp terminal 20 are electrically connected.

[0022] [Receptacle case 100: see Figures 4, 5, 6, 7, and 8] 4, a pair of cables 30 are connected to the receptacle case 100 from the rear side B in the second direction X. The receptacle case 100 accommodates a housing 10 to which a core wire 31 is attached.

[0023] The receptacle case 100 includes a case body 110 that accommodates the housing 10, a clamp 120 that secures the cable 30 inserted into the case body 110, and a packing (not shown). The case body 110 is provided with a first opening 111 at the rear B in the second direction X and a second opening 112 at the bottom D in the first direction Z. The case body 110 also has a housing accommodating section 113 in which the core wire 31 is attached to the crimp terminal 20 accommodated in the housing 10 and the housing 10 is accommodated after forming of the core wire 31 is completed.

[0024] When fixing the case body 110 and the cable 30, first the cable 30 is inserted through a ring-shaped packing, and then the cable 30 is inserted through the case body 110. When fastening the clamp 120, which has a female thread, to the case body 110, which has a male thread, the ring-shaped packing is crushed by the case body 110 and the clamp 120, causing the ring-shaped packing to elastically deform and come into close contact with the cable 30, thereby fixing it in place. The case body 110 and the clamp 120 are formed as a single unit by injection molding an electrically insulating resin material.

[0025] [Housing 10 and receptacle case 100: see Figures 5, 6, 7, and 8] 5, the procedure for attaching the core wire 31 to the housing 10 and the procedure for forming the core wire 31 will be described. The worker inserts the cable 30 from the first opening 111 to the second opening 112 of the case body 110. At the tip end of the cable 30 protruding from the second opening 112, the protective layer is removed to expose the core wire 31. The covering of the core wire 31 is also removed to expose the core wire main body portion 32. Then, the crimp terminals 20 are crimped onto the core wire main body portion 32. The crimp terminals 20 crimped onto the core wire main body portion 32 are accommodated in the terminal accommodating portions 11 of the housing 10. In this embodiment, the ten crimp terminals 20 crimped onto the ten core wires 31 are accommodated into the terminal accommodating portions 11 of the housing 10, respectively. At this time, the core wires 31 are attached in the direction in which the protrusions 12 of the housing 10 extend. It should be noted that the cross section of the cable 30 is not shown with hatching.

[0026] After the core wire 31 is attached to the housing 10 from a straight state, the direction of the core wire 31 is changed and a bending portion 33 is provided to bend the core wire 31. When bending the core wire 31 from a straight state, the forming operation is performed so that a part of the core wire 31 does not extend beyond the tip 12A of the protrusion 12.

[0027] Because the protrusion 12 is formed on the housing 10, it is possible to easily determine whether the forming operation of the core wire 31 has been performed as specified by visually checking whether a portion of the core wire 31 after forming has exceeded the tip 12A of the protrusion 12. Furthermore, for example, by placing a flat plate against the tip 12A of the protrusion 12 and checking whether the core wire 31 is in contact with the flat plate, it is possible to determine whether the core wire 31 after forming is within the range of the dimension L from the first surface 13 of the protrusion 12 to the tip 12A in the first direction Z, and thus whether the forming operation of the core wire 31 has been performed as specified.

[0028] Here, if the ten core wires 31 are attached to the crimp terminal 20 through free paths, for example, the core wires 31 may cross each other and overlap in the first direction Z, making it impossible for the housing 10 to be accommodated in the receptacle case 100. Also, for example, if the radius of curvature of the bent portion 33 of the core wire 31 is increased and the core wire 31 is formed so as to be far away from the first surface 13 of the housing 10, then in this case too, the housing 10 may not be able to reach a predetermined position in the first direction Z of the receptacle case 100, making it impossible to accommodate the housing 10. That is, when connecting the core wires 31 drawn out from the cable 30 to the housing 10, it is preferable to arrange them regularly without overlapping each other in the first direction Z. Furthermore, it is preferable to form the core wires 31 so that they pass near the first surface 13 of the housing 10.

[0029] After the core wire 31 has been formed, the housing 10 is inserted into the housing accommodating portion 113. In FIGS. 6 and 7 , the housing 10 is inserted into the housing accommodating portion 113 while tilting it toward the forward direction F in the second direction X. At this time, the housing 10 is accommodated in the housing accommodating portion 113 by pulling the cable 30 from the first opening 111 side. When the housing 10 is accommodated in the housing accommodating portion 113, the guide 14 of the protrusion 12 is advanced. The chamfer 15 formed on the outer side of the guide 14 of the housing 10 in the second direction X prevents the guide 14 from getting caught on the entrance portion of the second opening 112 or the protruding portion of the inner wall of the receptacle case 100 below D. The chamfer 15 on the guide 14 prevents the housing 10 from getting caught during insertion, thereby preventing the housing 10 from being forcibly inserted into the receptacle case 100. This prevents excessive load from being applied to the housing 10 and the receptacle case 100.

[0030] 8, when the housing 10 reaches the fully accommodated position in the housing accommodating portion 113, the terminal unit (not shown) is fitted into the housing 10 from the lower portion D, and the terminal set and the receptacle case 100 are fixed together by a fastener. In addition, the clamp 120 is fastened to the case body 110, and the cable 30 is fixed to the case body 110. The length dimension L of the protrusion 12 is set to a dimension that prevents the tip 12A of the protrusion 12 from contacting the ceiling surface 115 of the receptacle case 100 that faces the first surface 13 when the housing 10 reaches the fully accommodated position of the housing accommodation portion 113. In other words, the length dimension L of the protrusion 12 is smaller than the distance between the first surface 13 and the ceiling surface 115.

[0031] [Effects of the embodiment] [Effect 1] The housing 10 is accommodated in the receptacle case 100, and is formed with a terminal accommodating portion 11 that accommodates the crimp terminal 20, and a protrusion 12 that extends from a first surface 13 of the housing 10 in the upward U direction of the first direction Z, where U is the direction in which the core wire 31 is attached to the crimp terminal 20, and the dimension L from the first surface 13 of the protrusion 12 to the tip 12A of the protrusion 12 is larger than the diameter of the core wire 31. By forming the protrusion 12 on the housing 10, it is possible to easily determine whether the forming operation of the core wire 31 has been performed as specified by visually checking whether a portion of the core wire 31 after forming extends beyond the tip 12A of the protrusion 12.

[0032] [Effect 2] The protrusion 12 of the housing 10 has a guide 14 that protrudes outward from the first surface 13 and has a chamfer 15 formed on the outside of the housing 10 in the second direction X. When the housing 10 is inserted into the receptacle case 100, the chamfer 15 formed on the guide 14 makes it less likely for the housing 10 to get caught on a protruding portion or the like on the inner wall of the receptacle case 100. By making it less likely for the housing 10 to get caught on a protruding portion or the like on the inner wall of the receptacle case 100, it is possible to prevent the housing 10 from being forcibly inserted into the receptacle case 100. This makes it possible to prevent excessive load from being applied to the housing 10 and the receptacle case 100.

[0033] In addition to the above, the configurations given in the above embodiments can be selected or changed as appropriate to other configurations without departing from the spirit of the present invention. [Explanation of symbols]

[0034] 10. Housing 11 Terminal housing 12 protrusions 13 Page 1 14 Guide 15 Chamfering 16 Slanted Surface 20 Crimp terminal 30 Cable 31 Core Wire 32 Core body 33 Bend 100 Receptacle Case 110 Case body 111 First Opening 112 Second Opening 113 Housing receiving section 115 Ceiling surface 120 Clamp L dimension

Claims

1. A housing housed in the receptacle case and into which electric wires are connected, a protrusion extending toward one side in a first direction is formed from a first surface on the side where the electric wire is inserted into the interior, a dimension from the first surface of the protrusion to a tip on one side of the protrusion is greater than a diameter of the electric wire; housing.

2. At least two of the protrusions are formed, The distance between the two protrusions is equal to or greater than half the longitudinal dimension of the first surface. The housing of claim 1 .

3. The protrusions are formed at four corners of the first surface, The housing of claim 2 .

4. The protrusion has a guide that protrudes outward from the first surface. The housing of claim 3 .

5. The guide extends from the first surface to the other side in the first direction. The housing of claim 4.

6. a dimension from the first surface of the protrusion to a tip on one side of the protrusion is smaller than a dimension of a gap between the first surface facing the receptacle case and the receptacle case when the connector is housed in the receptacle case; The housing according to any one of claims 1 to 5.

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