Cover unit and connector

Abstract

The invention provides a cover unit and a connector which can simplify the structure and improve the assembling performance. The cover unit (40) is provided with: a columnar rubber plug (70) which can be pressed into the communication hole of the connector housing; and a plate-shaped cover (60) which has a fixing hole (64) and can be fixed to the connector housing. The rubber plug (70) is provided with: a rubber plug main body section (71); a first large-diameter part (72) which abuts against a first main surface (65) of the cover in an assembled state in which the rubber plug is assembled in the fixing hole; a fixing shaft part (73) which is embedded in the fixing hole in an assembled state; a second large-diameter section (74) that protrudes in a direction intersecting the press-in axis so as to be able to pass through the fixing hole by the elastic deformation of the second large-diameter section (74), the second large-diameter section (74) sandwiching the cover along the press-in axis with the first large-diameter section in an assembled state; and a temporary holding shaft part (75) extending from the second large-diameter part and capable of temporarily holding the rubber plug so that the rubber plug does not fall down relative to the cover in a temporary assembly state in which the rubber plug is inserted into the fixing hole.

Description

Technical Field

[0001] This invention relates to cover units and connectors. Background Technology

[0002] Conventionally, connectors have been designed for external voltage testing via a connecting hole (see, for example, Patent Document 1). This connector includes a connector housing and terminal parts housed within the housing. The housing has a connecting hole, allowing external voltage testing by having a probe of a voltage detector contact the terminal parts through the connecting hole. Additionally, the connector includes a cover unit. The cover unit includes: a rubber plug pressable into the connecting hole; a plate-shaped cover with a fixing hole for securing the rubber plug; and a rubber plug holder for mounting the rubber plug and fitting into the fixing hole of the cover. The cover unit is fixed to the connector housing, and the rubber plug is press-in into the connecting hole. By removing the cover unit from the connector housing, external voltage testing can be performed via the connecting hole. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2016-225055 Summary of the Invention The problem that the invention aims to solve

[0004] However, in the connectors described above, the cover unit requires a rubber plug retainer. Furthermore, the assemblability of installing the rubber plug into the retainer is poor. Specifically, the process of installing the rubber plug into the retainer is complex, requiring, for example, manual assembly.

[0005] The purpose of this invention is to provide a cover unit and connector that can simplify the structure and improve assemblability. Solution for solving the problem

[0006] The cover unit of the present invention comprises: a cylindrical rubber plug pressable into a communication hole of a connector housing along a press-in axis; and a plate-shaped cover having a fixing hole for fixing the rubber plug and being fixed to the connector housing. The rubber plug comprises: a rubber plug body portion pressable into the communication hole from its top end portion; a first large-diameter portion disposed at the base end of the rubber plug body portion, protruding in a direction intersecting the press-in axis, and abutting against the first main surface of the cover in the assembled state where the rubber plug is assembled into the fixing hole; and a fixing shaft portion extending from the first large-diameter portion toward the rubber plug body portion. The body extends in the opposite direction and is inserted into the fixing hole in the assembled state; the second large diameter portion is provided at the top end of the fixing shaft portion so that it can protrude through the size of the fixing hole in a direction intersecting the pressing axis through its own elastic deformation, and clamps the cover along the pressing axis with the first large diameter portion in the assembled state; and the temporary holding shaft portion extends from the second large diameter portion in the opposite direction to the fixing shaft portion, and can temporarily hold the rubber plug in the temporary assembled state of being inserted into the fixing hole so that the rubber plug will not fall down relative to the cover. Invention Effects

[0007] The cover unit and connector according to the present invention simplify the structure and improve assemblability. Attached Figure Description

[0008] Figure 1 This is a perspective view of the connector in one embodiment. Figure 2 This is an exploded perspective view of the connector in one embodiment. Figure 3 This is a cross-sectional view of the connector in one embodiment. Figure 4 This is a partial cross-sectional view showing the manufacturing process of the cover unit in one embodiment. Figure 5 This is a partial cross-sectional view showing the manufacturing process of the cover unit in one embodiment. Figure 6 This is a partial cross-sectional view showing the manufacturing process of the cover unit in one embodiment. Detailed Implementation

[0009] [Description of Embodiments of the Invention] First, embodiments of the present invention will be described. [1] The cover unit of the present invention comprises: a cylindrical rubber plug that can be pressed into a communication hole of a connector housing along a pressing axis; and a plate-shaped cover having a fixing hole for fixing the rubber plug and being fixed to the connector housing. The rubber plug comprises: a rubber plug body portion that can be pressed into the communication hole from its top end portion; a first large diameter portion provided at the base end of the rubber plug body portion, protruding in a direction intersecting the pressing axis, and abutting against the first main surface of the cover in the assembled state where the rubber plug is assembled into the fixing hole; and a fixing shaft portion extending from the first large diameter portion toward the rubber plug. The main body extends in the opposite direction and is inserted into the fixing hole in the assembled state; the second large diameter portion is provided at the top end of the fixing shaft portion so that it can protrude through the size of the fixing hole in a direction intersecting the pressing axis through its own elastic deformation, and clamps the cover along the pressing axis with the first large diameter portion in the assembled state; and the temporary holding shaft portion extends from the second large diameter portion in the opposite direction to the fixing shaft portion, and can temporarily hold the rubber plug in the temporary assembled state of being inserted into the fixing hole so that the rubber plug will not fall down relative to the cover.

[0010] According to this structure, when the second large-diameter portion passes through the fixing hole, the fixing shaft portion is inserted into the fixing hole, and the first and second large-diameter portions clamp the cap, thereby fixing the rubber plug to the cap. Therefore, compared to a structure that includes, for example, a separate rubber plug holder for fixing the rubber plug to the cap, the structure can be simplified. In addition, the rubber plug has a temporary holding shaft portion extending in the opposite direction from the second large-diameter portion to the fixing shaft portion. The temporary holding shaft portion can temporarily hold the rubber plug in a temporary assembled state where it is inserted into the fixing hole, so that the rubber plug does not fall down relative to the cap, thus improving the assemblability to the cap. For example, by using a first automatic machine that arranges the rubber plug in such a way that the temporary holding shaft portion is inserted into the fixing hole, and a second automatic machine that presses the rubber plug into an assembled state from the temporary assembled state where the temporary holding shaft portion is inserted into the fixing hole, the rubber plug can be easily assembled to the cap.

[0011] [2] In the above [1], the fixing hole may also have a hole expansion portion with a diameter that gradually increases toward the first main surface, and the second large diameter portion has an inclined portion, which is inclined in the temporary assembly state in such a way that it contacts the hole expansion portion surface.

[0012] According to this structure, the fixing hole has an enlarged diameter portion whose diameter gradually increases towards the first main surface, thus facilitating the insertion of the temporary retaining shaft portion of the rubber plug. Furthermore, the second large diameter portion has an inclined portion 74a, which, in the temporary assembled state where the temporary retaining shaft portion is inserted into the fixing hole, is inclined in such a way that it contacts the enlarged diameter portion of the fixing hole. Therefore, in the temporary assembled state, the rubber plug is less likely to fall off relative to the cap. Thus, the assemblability of the rubber plug to the cap is improved.

[0013] [3] In either [1] or [2] above, the base end of the rubber stopper body may have a main body expansion portion whose diameter gradually increases toward the first large diameter portion. According to this structure, the base end of the rubber stopper body has a main body expansion portion whose diameter gradually increases toward the first large diameter portion. Therefore, for example, when the rubber stopper is pressed in from the temporary assembly state where it is inserted into the fixing hole from the temporary holding shaft portion, bending of the rubber stopper can be suppressed.

[0014] [4] In any of the above [1] to [3], the rubber plug body may have a main shaft and a lip, the lip being able to press against the connecting hole by protruding radially outward from the main shaft, and the diameter of the temporary holding shaft being set to be greater than or equal to the diameter of the main shaft.

[0015] According to this structure, the diameter of the temporary holding shaft is set to be greater than or equal to the diameter of the main shaft of the rubber plug body. Therefore, compared to, for example, the case where the diameter is set to be smaller than the diameter of the main shaft, the rubber plug is less likely to fall off relative to the cap in the temporary assembly state.

[0016] [5] In any of the above [1] to [4], the rubber stopper may also be a solid body. According to this structure, the rubber stopper is a solid body, therefore, when the rubber stopper is pressed in, for example, in a temporary assembly state where it is inserted into the fixing hole from the temporary retaining shaft, bending of the rubber stopper can be suppressed. That is, for example, in a structure where the rubber stopper has internal gaps, the rubber stopper is prone to bending when pressed in, in a temporary assembly state where it is inserted into the fixing hole from the temporary retaining shaft, but if it is a solid body, this situation can be suppressed.

[0017] The connector of the present invention [6] It comprises: any one of the cover units described in [1] to [5] above; the connector housing; and terminal parts, housed inside the connector housing, which can be tested for voltage from the outside through the communication hole.

[0018] According to this structure, in connectors that can be tested for voltage from the outside through the connecting hole, the structure of the cover unit can be simplified, and the assembly of the rubber plug to the cover becomes good.

[0019] [Details of embodiments of the present invention] Specific examples of the connector of the present invention will be described below with reference to the accompanying drawings. In the drawings, for ease of explanation, sometimes a portion of the structure is shown enlarged or simplified. Furthermore, the dimensional ratios of the various parts sometimes differ in the drawings.

[0020] The term "cylindrical" as used in this specification includes not only a cylindrical shape with a continuous circumferential wall, but also shapes formed by combining multiple components to form a cylindrical shape, and shapes such as a C-shape with a notch in a portion of the circumference. The outer circumferential shape of a "cylindrical" includes, but is not limited to, circles, ellipses, and polygons with pointed or rounded corners. "Cylindrical" refers to a shape having a through hole when viewed from above, including cylindrical shapes where the outer circumferential shape and the inner circumferential shape of the through hole are the same, or cylindrical shapes where the outer circumferential shape and the inner circumferential shape of the through hole are different. "Cylindrical" includes a cylindrical shape having a predetermined length extending along an axial direction passing through the center axis of the through hole, regardless of the length. The term "opposite" in this specification refers to a position where surfaces or components are directly opposite each other, including not only positions where they are completely opposite each other, but also positions where they are partially opposite each other. Furthermore, the term "opposite" in this specification includes both cases where a component separate from the two parts is interposed between the two parts and cases where nothing is interposed between the two parts. Furthermore, the terms "first," "second," and "third" used in this specification are only used to distinguish objects and do not order them. This invention is not limited to these examples, but is shown through the claims and is intended to include all variations with the same meaning and scope as the claims.

[0021] (Structure of connector 10) like Figure 1 and Figure 2 As shown, connector 10 includes connector housing 20, metal shell 30, and cover unit 40. Additionally, as... Figure 3 As shown, connector 10 includes terminal parts 50. Connector 10 is installed, for example, in vehicles not shown, such as hybrid vehicles and electric vehicles. Specifically, connector 10 is fitted, for example, into the housing of an on-board device such as an inverter installed in a vehicle, and carries a large current.

[0022] The figures illustrate a first axis X, a second axis Y orthogonal to the first axis X, and a third axis Z, which serves as the pressing axis and is orthogonal to both the first and second axes Y. Additionally, the figures illustrate an upper direction Z1 along the third axis Z and a lower direction Z2 in the opposite direction to the upper direction Z1.

[0023] (Structure of connector housing 20) The connector housing 20 is made of resin material. like Figure 2 and Figure 3As shown, the connector housing 20 has a first cylindrical portion 21 and a second cylindrical portion 22. The first cylindrical portion 21 extends upward Z1 along the third axis Z, and the second cylindrical portion 22 bends from the upper end of the first cylindrical portion 21 and extends along the first axis X. Additionally, the connector housing 20 has a connecting hole 23, which extends through along the third axis Z, thereby connecting the inside and outside of the connector housing 20. In this embodiment, the connecting hole 23 is formed by the inner surface of a cylindrical portion 24 protruding upward Z1 from the connector housing 20. Figure 2 As shown, in this embodiment, two connecting holes 23 and cylindrical portions 24 are arranged along the second axis Y. Additionally, as... Figure 3 As shown, a terminal component 50 is housed and held inside the connector housing 20. The terminal component 50 is positioned to allow for external voltage testing via the connecting hole 23. Specifically, the terminal component 50 is positioned such that it passes through the connecting hole 23 Z2 below it. Furthermore, in... Figure 3 In the diagram, terminal part 50 is schematically shown as an L-shaped component, but it is not limited to this and can of course be constructed by combining two or more metal components.

[0024] In addition, such as Figure 2 As shown, two first nuts 25 are embedded in the connector housing 20. The first nuts 25 are disposed on both sides of the connector housing 20. The first nuts 25 are formed in a cylindrical shape and have female threaded grooves that open towards the upper Z1 of the connector housing 20.

[0025] Additionally, a second nut 26 is embedded in the connector housing 20. The second nut 26 is located at the rear end of the connector housing 20. Like the first nut 25, the second nut 26 is cylindrical and has a female threaded groove that opens towards the upper Z1 of the connector housing 20.

[0026] (Structure of metal shell 30) The metal housing 30 has an upper wall 31 covering the upper surface of the connector housing 20, side walls 32 covering both sides of the connector housing 20, and a rear wall 33 covering the rear end face of the connector housing 20. The upper wall 31 has an exposure hole 34 that exposes the cylindrical portion 24 of the connector housing 20 upward Z1. Viewed from above Z1, the exposure hole 34 in this embodiment is formed as an elongated hole including the area of ​​the two cylindrical portions 24. In addition, the upper wall 31 has a recess 35 at a position corresponding to the first nut 25, and a first through hole 36 at the bottom of the recess 35. In addition, the upper wall 31 has a second through hole 37 at a position corresponding to the second nut 26.

[0027] The metal housing 30 is secured to the connector housing 20 by a first screw 38 that passes through the first through hole 36 and engages with the first nut 25. The metal housing 30 suppresses the flow of high current through the terminal component 50 (see reference). Figure 3When the connector 10 radiates electromagnetic noise to the outside, it will cause electromagnetic noise to be emitted from the connector 10.

[0028] (Structure of cover unit 40) like Figures 1 to 3 As shown, the cover unit 40 includes a cover 60 that can be fixed to the connector housing 20 and two rubber plugs 70 assembled to the cover 60.

[0029] (The structure of the cover 60) The cover 60 is made of plate-shaped metal. like Figure 2 As shown, the cover 60 has a pair of bent tabs 61 that engage with the inner surface of the recess 35 of the metal housing 30. Additionally, the cover 60 has a cover through hole 62 at a position corresponding to the second through hole 37. With the bent tabs 61 engaged with the inner surface of the recess 35, the cover 60 is secured to the connector housing 20 and the metal housing 30 by a second screw 63 that passes through the cover through hole 62 and the second through hole 37 and engages with the second nut 26.

[0030] Additionally, the cover 60 has a fixing hole 64 for fixing the rubber plug 70 at a position corresponding to the communication hole 23 of the connector housing 20. In this embodiment, two fixing holes 64 are provided by being located at positions corresponding to the two communication holes 23 respectively.

[0031] like Figure 3 As shown, the fixing hole 64 extends from the first main surface 65, which is the lower Z2 surface, on the side opposite to the upper wall 31 of the metal shell 30, to the second main surface 66, which is the upper Z1 surface, on the opposite side of the first main surface 65.

[0032] like Figure 4 As shown, the fixing hole 64 has a hole enlargement portion 64a at the location connected to the first main surface 65, with its diameter gradually increasing towards the first main surface 65. Additionally, the fixing hole 64 has a chamfered portion 64b at the location connected to the second main surface 66, with its diameter gradually increasing towards the second main surface 66. Furthermore, the fixing hole 64 has a diameter-constant portion 64c between the hole enlargement portion 64a and the chamfered portion 64b. In this embodiment, the maximum diameter of the hole enlargement portion 64a is set to be larger than the maximum diameter of the chamfered portion 64b. Furthermore, in this embodiment, the length of the hole enlargement portion 64a along the third axis Z is set to be larger than the length of the chamfered portion 64b along the third axis Z. Moreover, Figures 4 to 6 This is a diagram showing the manufacturing process of the cover unit 40, and... Figures 1 to 3 In contrast, the diagram will be shown in reverse along the direction of the third axis Z, i.e., Z1 above and Z2 below.

[0033] (Structure of rubber stopper 70) like Figure 3As shown, the rubber plug 70 can be pressed into the communication hole 23 of the connector housing 20 along the third axis Z, which serves as the pressing axis. Specifically, the rubber plug 70 is made of a cylindrical rubber material. Furthermore, the rubber plug 70 is a solid body; that is, the rubber plug 70 has a structure without internal gaps. The rubber plug 70 has a rubber plug body portion 71, a first large diameter portion 72, a fixed shaft portion 73, a second large diameter portion 74, and a temporary holding shaft portion 75. The rubber plug body portion 71, the first large diameter portion 72, the fixed shaft portion 73, the second large diameter portion 74, and the temporary holding shaft portion 75 are arranged in this order from bottom Z2 to top Z1.

[0034] The rubber plug body 71 is formed into a communication hole 23 that can be pressed into the connector housing 20 from the top end. Furthermore, the top end of the rubber plug body 71 is the lower Z2 end of the rubber plug 70.

[0035] like Figure 4 As shown, the rubber stopper body 71 of this embodiment has a main shaft portion 71a and a lip portion 71b. The lip portion 71b protrudes radially outward from the main shaft portion 71a and can press into contact with the communicating hole 23 (see reference). Figure 3 The lip 71b is provided around the entire circumference of the main body shaft portion 71a, and its entire circumference can be pressed into contact with the connecting hole 23. In this embodiment, the rubber stopper main body portion 71 has two lips 71b at a position separated along the third axis Z. In addition, the base end of the rubber stopper main body portion 71 of this embodiment has a main body expansion portion 71c whose diameter gradually increases toward the first large diameter portion 72.

[0036] The first large diameter portion 72 is provided at the base end of the rubber stopper body portion 71 and protrudes in a direction intersecting the third axis Z. The diameter of the first large diameter portion 72 is set to be larger than the diameter of the lip portion 71b.

[0037] like Figure 6 As shown, the first large diameter portion 72 abuts against the first main surface 65 of the cover 60 in the fixed state where the rubber stopper 70 is fixed to the fixing hole 64. In detail, the end face 72a of the first large diameter portion 72 is configured to abut against the first main surface 65 of the cover 60 in the fixed state.

[0038] The fixing shaft portion 73 extends from the first large diameter portion 72 in the opposite direction to the rubber plug body portion 71. The fixing shaft portion 73 is configured to be inserted into the fixing hole 64 in the fixed state where the rubber plug 70 is fixed in the fixing hole 64.

[0039] The second large-diameter portion 74 is provided at the top end of the fixed shaft portion 73, and can protrude through the size of the fixed hole 64 in a direction intersecting the third axis Z through its own elastic deformation. The second large-diameter portion 74 is configured to clamp the cover 60 along the third axis Z with the first large-diameter portion 72 in the fixed state where the rubber plug 70 is fixed in the fixed hole 64. In addition, the diameter of the second large-diameter portion 74 is set such that when it is pressed from the rubber plug body portion 71 into the communicating hole 23 (see reference). Figure 3 When the cap 60 is lifted upwards Z1, the rubber stopper body 71 will not come out of the fixing hole 64, but will come out of the connecting hole 23.

[0040] like Figure 5 As shown, the temporary retaining shaft portion 75 extends in the opposite direction from the second large-diameter portion 74 to the fixed shaft portion 73. The temporary retaining shaft portion 75 is configured to temporarily retain the rubber stopper 70 in a temporarily assembled state where the temporary retaining shaft portion 75 is inserted into the fixed hole 64, preventing the rubber stopper 70 from falling down relative to the cover 60. In this embodiment, the diameter of the temporary retaining shaft portion 75 is set to be greater than or equal to the diameter of the main shaft portion 71a of the rubber stopper body portion 71. Furthermore, the top end of the temporary retaining shaft portion 75 has a tapered portion 75a whose diameter gradually decreases towards the top end.

[0041] Furthermore, the second large-diameter portion 74 in this embodiment has an inclined portion 74a, which is inclined in contact with the enlarged diameter portion 64a of the fixing hole 64 in the temporary assembly state where the temporary retaining shaft portion 75 is inserted into the fixing hole 64. That is, in this embodiment, in the temporary assembly state, the rubber plug 70 is supported so as not to fall down relative to the cover 60 by the outer peripheral surface of the temporary retaining shaft portion 75 contacting the constant diameter portion 64c of the fixing hole 64 and the inclined portion 74a contacting the enlarged diameter portion 64a.

[0042] (Manufacturing process and function of cover unit 40) The cover unit 40, constructed as described above, is assembled as follows. First, such as Figure 4 and Figure 5 As shown, the cover 60, with its first main surface 65 facing upwards at Z1, is positioned with a rubber stopper 70 from above Z1 by a first automatic mechanism 80. The first automatic mechanism 80 is configured to hold the rubber stopper 70 and to move the held rubber stopper 70.

[0043] like Figure 5As shown, the first automatic machine 80 positions the rubber plug 70 such that the temporary retaining shaft portion 75 is inserted into the fixing hole 64. Thus, the rubber plug 70 is supported so that it will not fall over relative to the cover 60 by contacting the outer peripheral surface of the temporary retaining shaft portion 75 with the diameter-constant portion 64c of the fixing hole 64, and by contacting the inclined portion 74a with the enlarged diameter portion 64a of the hole. In other words, the rubber plug 70 is independent of the cover 60 by engaging with its own temporary retaining shaft portion 75 and inclined portion 74a. Therefore, the rubber plug 70 is in a temporary assembled state.

[0044] Next, as Figure 6 As shown, the rubber stopper 70 is pressed in from above (Z1) by the second automatic mechanism 81. The second automatic mechanism 81 is a device that presses the top surface 71d of the rubber stopper body 71 downwards (Z2). When the rubber stopper 70 is pressed in by the second automatic mechanism 81, the second large-diameter portion 74 passes through the fixing hole 64 through its own elastic deformation. Then, the fixing shaft portion 73 is inserted into the fixing hole 64, and the first large-diameter portion 72 and the second large-diameter portion 74 clamp the cover 60, thereby assembling the rubber stopper 70 onto the cover 60. Thus, the rubber stopper 70 is in the assembled state.

[0045] like Figure 3 As shown, in the cover unit 40 assembled as described above, the cover 60 is fixed to the connector housing 20, and the rubber plug body 71 is pressed into the communication hole 23. This prevents liquid from seeping into the interior of the connector housing 20 through the communication hole 23.

[0046] Additionally, the cover unit 40 is removed from the connector housing 20 during voltage testing of the terminal component 50. Furthermore, voltage testing of the terminal component 50 is performed from outside the connector 10 by contacting the terminal component 50 with a probe of an electroscope (not shown) through the connecting hole 23.

[0047] (Effects of this implementation method) Next, the effects of the above-described embodiments will be described. (1) When the second large diameter portion 74 passes through the fixing hole 64, the fixing shaft portion 73 is inserted into the fixing hole 64, and the first large diameter portion 72 and the second large diameter portion 74 clamp the cover 60, thereby fixing the rubber plug 70 to the cover 60. Therefore, the structure can be simplified compared to, for example, a separate rubber plug holder for fixing the rubber plug 70 to the cover 60. In addition, the rubber plug 70 has a temporary holding shaft portion 75 extending from the second large diameter portion 74 in the opposite direction to the fixing shaft portion 73. The temporary holding shaft portion 75 can temporarily hold the rubber plug 70 in the temporary assembled state of being inserted into the fixing hole 64, so that the rubber plug 70 will not fall down relative to the cover 60, thus improving the assemblability to the cover 60. For example, by using a first automatic machine 80 that arranges the rubber plug 70 in such a way that the temporary holding shaft portion 75 is inserted into the fixing hole 64 and a second automatic machine 81 that presses the rubber plug 70 into the assembled state from the temporary assembled state, the rubber plug 70 can be easily assembled to the cover 60.

[0048] (2) The fixing hole 64 has an enlarged diameter portion 64a that gradually increases in diameter toward the first main surface 65, thus facilitating the insertion of the temporary retaining shaft portion 75 of the rubber plug 70. Furthermore, the second large diameter portion 74 has an inclined portion 74a, which is inclined in contact with the enlarged diameter portion 64a of the fixing hole 64 in the temporary assembled state where the temporary retaining shaft portion 75 is inserted into the fixing hole 64. Therefore, in the temporary assembled state, the rubber plug 70 is less likely to fall off relative to the cover 60. Thus, the assemblability of the rubber plug 70 to the cover 60 is improved.

[0049] (3) The base end of the rubber plug body 71 has a main body expansion portion 71c whose diameter gradually increases toward the first large diameter portion 72. Therefore, for example, when the rubber plug 70 is pressed in from the temporary assembly state where it is inserted into the fixing hole 64 from the temporary holding shaft portion 75, bending of the rubber plug 70 relative to the third axis Z can be suppressed.

[0050] (4) The diameter of the temporary holding shaft 75 is set to be greater than or equal to the diameter of the main shaft 71a of the rubber plug body 71. Therefore, compared to the case where it is set to be smaller than the diameter of the main shaft 71a, the rubber plug 70 is less likely to fall off relative to the cover 60 in the temporary assembly state.

[0051] (5) Since the rubber plug 70 is a solid body, when the rubber plug 70 is pressed in, for example, in a temporary assembly state where it is inserted from the temporary retaining shaft portion 75 into the fixing hole 64, bending of the rubber plug 70 relative to the third axis Z can be suppressed. That is, for example, in a structure where the rubber plug 70 has an internal gap, the rubber plug 70 is prone to bending when it is pressed in in a temporary assembly state where it is inserted from the temporary retaining shaft portion 75 into the fixing hole 64, but if it is a solid body, this situation can be suppressed.

[0052] (Modified Example) The above embodiments can be implemented in the following variations. The above embodiments and the following variations can be combined with each other within the scope of technical inconsistency.

[0053] In the above embodiment, the fixing hole 64 has a hole enlargement portion 64a whose diameter gradually increases toward the first main surface 65, but it is not limited to this. For example, it may also have a structure without the hole enlargement portion 64a. Furthermore, in this case, the second large diameter portion 74 is preferably a structure without the inclined portion 74a. In addition, even if the fixing hole 64 has a structure with the hole enlargement portion 64a, the second large diameter portion 74 may also be a structure without the inclined portion 74a.

[0054] • In the above embodiment, the base end of the rubber stopper body 71 has a main body expansion portion 71c whose diameter gradually increases toward the first large diameter portion 72, but it is not limited to this and may also have a structure without the main body expansion portion 71c.

[0055] • In the above embodiment, the diameter of the temporary holding shaft 75 is set to be greater than or equal to the diameter of the main shaft 71a of the rubber plug body 71, but it is not limited to this. For example, it may be set to be smaller than the diameter of the main shaft 71a.

[0056] In the above embodiment, the rubber stopper 70 is a solid body, but it is not limited to this. For example, it may also have a structure with internal voids. In addition, the rubber stopper 70 may also have a structure in which other components such as resin components are embedded internally.

[0057] In the above embodiment, the connector housing 20 has a structure with two connecting holes 23, but it is not limited to this. For example, it can be changed to a structure with one or more connecting holes 23. In addition, of course, in this case, the number of rubber plugs 70 in the cover unit 40 also needs to be changed.

[0058] The embodiments disclosed herein are illustrative in all respects, and the invention is not limited to these illustratives. That is, the scope of the invention is indicated by the claims and is intended to include all modifications within the meaning and scope of the claims. Explanation of reference numerals in the attached figures

[0059] 10 Connectors 20 Connector Housing 21 1st cylindrical part 22 2nd cylindrical part 23 Connecting holes 24. Cylinder section 25 Nut 1 26. Nut 2 30 Metal Casing 31 upper wall 32 Sidewall 33 Rear wall 34 Exposed holes 35 recess 36 First through hole 37 Second through hole 38 First screw 40 cover units 50 terminal components 60 caps 61 Bending sheet 62. Through hole in the cover. 63 Second screw 64 fixing holes 64a Hole Enlargement Section 64b Chamfered section 64c Constant Diameter Section 65 Main side 1 66 2nd Main Side 70 Rubber Stopper 71 Rubber stopper body 71a Main body shaft 71b Lips 71c Main body expansion section 71d top face 72 1st large diameter part 72a end face 73 Fixed shaft section 74 2nd large diameter part 74a Inclined section 75 Temporarily retain shaft portion 75a Conical section 80. First Automata 81. Second Automata X Axis 1 Y-axis 2 Z Third axis (pressed-in axis) Z1 Above Z2 below

Claims

1. A cover unit, comprising: A cylindrical rubber plug can be pressed into the communication hole of the connector housing along the press-in axis; and, The plate-shaped cover has fixing holes for securing the rubber plug and can be fixed to the connector housing, wherein... The rubber stopper has: The rubber stopper body can be pressed into the communicating hole from the top end; The first large diameter portion is provided at the base end of the rubber plug body portion, protrudes in a direction intersecting the pressing axis, and abuts against the first main surface of the cover in the assembled state where the rubber plug is assembled into the fixing hole; A fixed shaft portion extends from the first large diameter portion in the opposite direction to the rubber plug body portion and is inserted into the fixed hole in the assembled state; The second large-diameter portion, located at the top end of the fixed shaft portion, is designed to protrude through the size of the fixed hole in a direction intersecting the press-in axis via its own elastic deformation. In the assembled state, it clamps the cover along the press-in axis together with the first large-diameter portion; and... The temporary retaining shaft extends in the opposite direction from the second large diameter portion to the fixed shaft portion, and can temporarily retain the rubber plug in a temporary assembled state that is inserted into the fixed hole, so that the rubber plug will not fall down relative to the cover.

2. The cover unit according to claim 1, wherein, The fixing hole has an enlarged diameter portion whose diameter gradually increases toward the first main surface. The second large diameter portion has an inclined portion, which is inclined in the temporary assembly state in such a way that it contacts the surface of the hole enlargement portion.

3. The cover unit according to claim 1, wherein, The base end of the rubber stopper body has a main body expansion section whose diameter gradually increases toward the first large diameter section.

4. The cover unit according to claim 1, wherein, The rubber stopper body has a main shaft portion and a lip portion, the lip portion being able to press into contact with the communicating hole by protruding radially outward from the main shaft portion. The diameter of the temporary holding shaft is set to be greater than or equal to the diameter of the main shaft.

5. The cover unit according to claim 1, wherein, The rubber stopper is solid.

6. A connector comprising: The cover unit according to any one of claims 1 to 5; The connector housing; and, The terminal components are housed inside the connector housing and can be tested for voltage from the outside through the connecting hole.

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