CN110190459A - A kind of connector shell component and its anticreep block piece and connector - Google Patents
A kind of connector shell component and its anticreep block piece and connector Download PDFInfo
- Publication number
- CN110190459A CN110190459A CN201810155480.7A CN201810155480A CN110190459A CN 110190459 A CN110190459 A CN 110190459A CN 201810155480 A CN201810155480 A CN 201810155480A CN 110190459 A CN110190459 A CN 110190459A
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- China
- Prior art keywords
- screw
- block piece
- anticreep
- perforation
- insulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/512—Bases; Cases composed of different pieces assembled by screw or screws
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The present invention relates to a kind of connector shell component and its anticreep block pieces and connector, anticreep block piece includes the block piece ontology being assemblied on insulator for the axial activity along screw perforation, block piece ontology, which is equipped with, cooperates the Stop structure separated to prevent stop part ontology with insulator with insulator limit block for the axial direction along screw perforation, the limiting section for being blocked in screw movement routine to prevent screw from deviating from from screw perforation is additionally provided on the block piece ontology, when screw is unscrewed from screw perforation, the setting of limiting section can guarantee that block piece ontology follows screw to be displaced outwardly always, it is detached from after being threadedly engaged of screw perforation in screw, block piece ontology is limited on insulator by Stop structure, limiting section can guarantee to limit screw in screw perforation, the anticreep design of screw thus may be implemented.It is relatively simple for structure, and do not need to restructure screw itself, anticreep is reliable, and cost is relatively low.
Description
Technical field
The present invention relates to a kind of connector shell component and its anticreep block pieces and connector.
Background technique
It is insulator that connector in the prior art, which includes shell, shell, and metal shell, insulator are covered with outside insulator
It is equipped with the core perforation installed for corresponding cable core, the hole wall of line heart perforation is equipped with screw perforation, in screw perforation
It is coated with the line pressing bolt for being fixed on cable core in corresponding core perforation.In the actual working process, in order to
It prevents line pressing bolt by deviating from screw perforation, corresponding anticreep method is generally required to limit anticreep to line pressing bolt.At present
The scheme of toner screw is prevented, it is most of to be realized by turning over the methods of riveting, painting screw thread glue.The method for wherein turning over riveting not only needs
More restructuring is carried out to screw, also to increase and turn over riveter sequence, causes the increase of manufacturing cost, and manufacture more multiple
It is miscellaneous；For the anticreep method by applying screw thread glue on screw thread surface, after often screwing certain number in screw, screw thread glue
Failure, does not just have the effect of anticreep.
Summary of the invention
The purpose of the present invention is to provide a kind of connector shell components, to solve screw anticreep scheme in the prior art
The problem of complexity, poor reliability；The object of the invention is also to provide a kind of anticreep block pieces of screw anti-drop assembly；The present invention
Purpose also reside in a kind of connector using the screw anti-drop assembly be provided.
To achieve the above object, the technical solution of anticreep block piece of the present invention is:
Scheme 1, anticreep block piece, including being assemblied in the block piece ontology on insulator, block piece for the axial activity along screw perforation
Ontology is equipped with to cooperate for the axial direction along screw perforation with insulator limit block and separate to prevent stop part ontology with insulator
Stop structure, be additionally provided with for being blocked in screw movement routine to prevent screw from screw perforation on the block piece ontology
The limiting section of abjection.
Scheme 2, on the basis of scheme 1, the block piece ontology includes the baffle for being blocked in the nut side of screw,
The limiting section is equipped with for screwdriver across the handle hole to load and unload screw, one end aperture of the close screw of the handle hole
Edge constitutes the limiting section.
Scheme 3, on the basis of scheme 2, the handle hole there are two more than, each handle hole is between in the plate face of baffle
Every arrangement.
Scheme 4, on the basis of 1 ~ 3 any one of scheme, the anticreep block piece further includes that root is fixed on block piece ontology
And bar is installed in the anticreep hole being threaded on insulator for activity, the Stop structure is arranged on installing bar.
Scheme 5, on the basis of scheme 4, the Stop structure include be arranged in the top for installing bar be used for and anticreep
The resilient barb of the aperture edge block cooperation in hole.
Scheme 6, on the basis of scheme 5, the resilient barb is there are two more than, along installing the circumferentially-spaced arrangement of bar.
Scheme 7, on the basis of scheme 3, the anticreep block piece further includes that root is fixed on block piece ontology and for living
Bar is installed in the dynamic anticreep hole being threaded on insulator, the Stop structure is arranged on installing bar, and each handle hole is in wearing
Fill the two sides arranged for interval that supports or opposes of bar.
The technical solution of connector shell component of the present invention is:
Scheme 1, connector shell component, including insulator are provided with screw perforation on insulator, are coated with spiral shell in screw perforation
Nail, it is characterised in that: connector shell component further includes anticreep block piece, and anticreep block piece includes the axial activity dress along screw perforation
Assigned in the block piece ontology on insulator, block piece ontology is equipped with for the axial direction and the cooperation of insulator limit block along screw perforation
To prevent the Stop structure that stop part ontology is separated with insulator, the movement for being blocked in screw is additionally provided on the block piece ontology
Limiting section in path to prevent screw from deviating from from screw perforation, active strokes of the block piece ontology along screw perforation axial direction
Less than the abjection stroke of screw.
Scheme 2, on the basis of scheme 1, the block piece ontology includes the baffle for being blocked in the nut side of screw,
The limiting section is equipped with for screwdriver across the handle hole to load and unload screw, one end aperture of the close screw of the handle hole
Edge constitutes the limiting section.
Scheme 3, on the basis of scheme 2, the handle hole there are two more than, each handle hole is between in the plate face of baffle
Every arrangement.
Scheme 4, on the basis of 1 ~ 3 any one of scheme, the insulator be equipped with extended in the same direction with screw perforation it is anti-
De- hole, the anticreep block piece further include that root is fixed on block piece ontology and in the movable anticreep hole being threaded on insulator
Install bar, the Stop structure is arranged on installing bar.
Scheme 5, on the basis of scheme 4, the Stop structure include be arranged in the top for installing bar be used for and anticreep
The resilient barb of the aperture edge block cooperation in hole.
Scheme 6, on the basis of scheme 5, the resilient barb is there are two more than, along installing the circumferentially-spaced arrangement of bar.
Scheme 7, on the basis of scheme 3, the insulator is equipped with the anticreep hole that extends in the same direction with screw perforation, described
Anticreep block piece further includes the bar that installs in the anticreep hole that root is fixed on block piece ontology and activity is threaded on insulator, described
Stop structure is arranged on installing bar, and each handle hole is in the two sides arranged for interval that supports or opposes for installing bar.
Scheme 8, on the basis of 1 ~ 3 any one of scheme, the screw end of the screw is equipped with and is plugged in screw perforation
Polished rod portion, the end in the polished rod portion constitutes the pressure connection terminal for crimping cable.
The technical solution of connector of the present invention is:
Scheme 1, connector, including insulator and setting, in the intracorporal crimping contact that insulate, insulator is equipped with screw perforation,
Screw is coated in screw perforation, it is characterised in that: connector shell component further includes anticreep block piece, and anticreep block piece includes along spiral shell
The axial activity of nail perforation is assemblied in the block piece ontology on insulator, block piece ontology be equipped with for along screw perforation axial direction with
Insulator limit block cooperates the Stop structure separated to prevent stop part ontology with insulator, is additionally provided with use on the block piece ontology
Limiting section in the movement routine for be blocked in screw to prevent screw from deviating from from screw perforation, the block piece ontology is along screw
The axial active strokes of perforation are less than the abjection stroke of screw.
Scheme 2, on the basis of scheme 1, the block piece ontology includes the baffle for being blocked in the nut side of screw,
The limiting section is equipped with for screwdriver across the handle hole to load and unload screw, one end aperture of the close screw of the handle hole
Edge constitutes the limiting section.
Scheme 3, on the basis of scheme 2, the handle hole there are two more than, each handle hole is between in the plate face of baffle
Every arrangement.
Scheme 4, on the basis of 1 ~ 3 any one of scheme, the insulator be equipped with extended in the same direction with screw perforation it is anti-
De- hole, the anticreep block piece further include that root is fixed on block piece ontology and in the movable anticreep hole being threaded on insulator
Install bar, the Stop structure is arranged on installing bar.
Scheme 5, on the basis of scheme 4, the Stop structure include be arranged in the top for installing bar be used for and anticreep
The resilient barb of the aperture edge block cooperation in hole.
Scheme 6, on the basis of scheme 5, the resilient barb is there are two more than, along installing the circumferentially-spaced arrangement of bar.
Scheme 7, on the basis of scheme 3, the insulator is equipped with the anticreep hole that extends in the same direction with screw perforation, described
Anticreep block piece further includes the bar that installs in the anticreep hole that root is fixed on block piece ontology and activity is threaded on insulator, described
Stop structure is arranged on installing bar, and each handle hole is in the two sides arranged for interval that supports or opposes for installing bar.
Scheme 8, on the basis of 1 ~ 3 any one of scheme, the screw end of the screw is equipped with and is plugged in screw perforation
Polished rod portion, the end in the polished rod portion constitutes the pressure connection terminal for crimping cable.
The beneficial effects of the present invention are: compared with the prior art, connector according to the present invention, by insulator
Activity assembly block piece ontology, and is arranged limiting section on block piece ontology, by Stop structure limit block piece ontology and insulator it
Between relative position, and cooperated by limiting section and screw block, so as to realize in actual installation process, block piece sheet
Body can be move freely on insulator, and move freely extreme position by Stop structure limitation block piece ontology, installed
During screw, block piece ontology plays the role of screw anticreep due to being self-possessed or following screw to float up and down；By screw from
When unscrewing in screw perforation, for screw during separating with screw perforation, the setting of limiting section can guarantee block piece ontology one
Directly screw is followed to be displaced outwardly, be detached from after being threadedly engaged of screw perforation in screw, block piece ontology passes through Stop structure limitation
On insulator, can guarantee to limit screw in screw perforation by the setting of limiting section at this time, screw will not continue to
The anticreep design of screw thus may be implemented in outer movement.It is relatively simple for structure, and do not need to restructure screw itself, prevent
De- reliable, cost is relatively low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment 1 of connector of the present invention；
Fig. 2 is the structural schematic diagram of insulator in Fig. 1；
Fig. 3 is the structural schematic diagram of the anticreep block piece in Fig. 1；
Fig. 4 is the structural schematic diagram of the screw in Fig. 1.
Description of symbols: 1- insulator；2- anticreep block piece；3- screw；The perforation of 11- core；12- convex section；13- cladding
Section；14- scrap (bridge)；15- screw perforation；16- anticreep hole；17- crimping contact；21- baffle；22- installs bar；23- handle hole；
24- resilient barb；25- limited step；31- nut；32- screw rod；33- polished rod.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The embodiment 1 of connector of the present invention, as shown in Figures 1 to 4, the connector include insulator 1, are set in insulator 1
It is equipped with the core perforation 11 that axis extends along the longitudinal direction, there are two core perforation 11, and relative spacing is arranged on insulator 1,
And two core perforation 11 are coaxially arranged, live conductor contact 17 are arranged in core perforation 11, while being located on insulator 1
Connection core perforation 11 is provided at the sidewall locations of core perforation 11 in external screw perforation 15, screw perforation 15 is screw thread
Hole is coated with screw 3 in screw perforation 15, by being threadedly engaged for screw 3 and screw perforation 15, so as to pass through screw 3
Top and core extrusion fit so that core is crimped on crimping contact 17.
For insulator 1 comprising two convex sections 12 extended forward, above-mentioned two cores perforation, 11 difference
It is arranged on two convex sections 12, two 12 or so arranged for interval of convex section, is formed with certain gap therebetween, while absolutely
Edge body 1 further includes the cladding section 13 for being coated on the outside of two convex sections, and above-mentioned screw perforation 15 is through cladding section 13 and convex
Section 12 out, it is corresponding cladding section 13 on correspond to above-mentioned gap position at formation scrap (bridge) 14.On each convex section 12
There are two spaced apart screw perforation 15 along the longitudinal direction, the interior helicitic textures being arranged of screw perforation 15, and hole is arranged in for setting
On lower semisection, the upper semisection of screw perforation 15 is unthreaded hole.
For screw 3, in the present embodiment comprising nut 31 and screw rod 32, wherein the lower semisection of screw rod 32 be
Polished rod 33, in this way setting can be realized during screw 3 is screwed in screw perforation 15, and polished rod 33 is directly through screw perforation
15 cooperate with the core opposing compression in crimping contact 17, and extrudings end face is plane, guarantee squeeze pressure, while by screw
During 3 screw out from screw perforation 15, taken off between each other in the screw rod 32 on screw 3 with the thread segment in screw perforation 15
When from being threadedly engaged, screw 3 is being continued to rotate, due to not having screw thread on polished rod 33, then screw 3 will not be after in screw perforation 15
Continuous to move up, this makes it possible to guarantee position of the screw 3 in screw perforation 15, while the disengaging of polished rod 33 at this time is worn with core
The extrusion fit of core in hole 11 facilitates penetrating or taking out for core.
In order to avoid screw 3 back-out when misoperation cause screw 3 to fall off, and then cause screw 3 lose the problem of, this
In embodiment, being equipped on above-mentioned insulator 1 positioned at activity at scrap (bridge) 14 can be freely up and down movable anti-relative to insulator 1
Off-gear part 2, anticreep block piece 2, insulator 1 and screw 3 constitute connector shell component, which includes block piece ontology, gear
Part ontology is equipped with for moveing freely pole with the limit cooperation of 1 block of insulator to limit block piece ontology relative to insulator 1
The Stop structure of extreme position, be additionally provided on block piece ontology for 3 block of screw cooperate to prevent screw 3 from screw perforation 15
The limiting section of middle abjection, in the present embodiment, block piece ontology include the baffle 21 for being blocked in 31 upside of nut of screw 3, the gear
The downside plate face and 31 block of nut of plate 21 cooperate and constitute limiting section, corresponding during screwing out screw 3, baffle 21
31 upside of nut is ridden upon, and follows nut 31 to synchronize and moves up, after the thread segment that screw 3 screws out screw perforation 15, spiral shell
Nail 3 no longer moves up, at this point, also be located at or be located substantially near by anticreep block piece 2 in freely up and down movable extreme position, by
In screw 3 at this time also in screw perforation 15, the cooperation between the nut 31 of baffle 21 and screw 3 can be complete by screw 3
It is blocked in screw perforation 15, prevents screw 3 from falling off.It is corresponded on baffle 21 accordingly and is provided with operation at the position of nut 31
Hole 23, the handle hole 23 penetrate through the two sides plate face setting of baffle 21, and convenient screwdriver is passed through to screw screw 3.And it is above-mentioned
The position of the lower end aperture edge in the lower face respective operations hole 23 of baffle 21 forms the limiting section.It is corresponding on the baffle 21
It is provided with handle hole 23 at the position of each land perforation, the screw 3 on two convex sections 12 is realized by a block baffle 21
Whole limit block.
Be additionally provided with that root is fixedly connected and extends downwardly with the lower face of baffle 21 on above-mentioned block piece ontology installs bar
22, above-mentioned Stop structure is arranged on installing bar 22, specific to be provided with anticreep hole 16 on the scrap (bridge) 14 of insulator 1,
About the 16 anticreep hole extends and penetrates through scrap (bridge) 14, and Stop structure includes that the bullet for installing the top of bar 22 and extending downwardly is arranged in
Property barb 24, resilient barb 24 has the limited step 25 along the diameter convex for installing bar 22, and install the size of bar 22 with it is upper
The size in the anticreep hole 16 stated is almost the same, and the upper surface of above-mentioned limited step 25 forms the lower end aperture side with anticreep hole 16
The vertically stopping surface of block cooperation.There are two above-mentioned limited steps 25, and relative spacing is arranged in the top for installing bar 22.?
In actual installation process, when block piece ontology to be inserted into anticreep hole 16, the hole wall in anticreep hole 16 can compress limited step 25,
Make 24 flexible deformation of resilient barb and gather relatively, after passing through anticreep hole 16, resilient barb 24 restores former under elastic reaction
Shape, the upper surface of limited step 25 block opposite with the lower end surface of scrap (bridge) 14 realize the anti-drop function of block piece ontology.Meanwhile in order to
Facilitate the opposite installation of anticreep block piece 2 and scrap (bridge) 14, the lower end surface of above-mentioned limited step 25 is the inclined wedge shape that comes closer
Face.In order to avoid block piece ontology rotates on scrap (bridge) 14, above-mentioned anticreep hole 16 and to install bar 22 be rectangular configuration.
In the actual working process, screw 3 is placed in screw perforation 15, then assembles block piece ontology activity
In anticreep hole 16, during screwing screw 3, screw 3 is moved down, and block piece ontology also can be to moving down due to being self-possessed at this time
It is dynamic, it is finally sticked on the outer peripheral surface of insulator 1, guarantees integrally-built compact；When needing to screw out on screw 3, screw 3
It moving up, block piece ontology is moved up by the pushing tow of nut 31, after the thread segment that screw 3 is screwed out to screw perforation 15, spiral shell
The setting of polished rod 33 on nail 3, which enables screw 3 to rest on, will not continue up movement in screw perforation 15, at this point, block piece sheet
The position of body moved up and down is also at extreme position, can be avoided screw 3 and falls off from screw perforation 15.Structure is simpler
It is single, and cost is relatively low, conveniently installs and uses.
The embodiment 2 of connector of the invention, difference from example 1 is that, the screw rod of screw can be set to
The baffle design of thread segment including the polished end connecting with nut and the top for being connected to light bar segment, above-mentioned block piece ontology is
Material that can be freely elastically deformed, and it is equipped on baffle the through-hole for being set in light bar segment, and the diameter of through-hole
Less than the diameter of thread segment, screw and screw perforation relative separation can be avoided when screwing out screw in this way.
The embodiment 3 of connector of the invention, difference from example 1 is that, block piece ontology can be provided with more
It is a, a screw perforation is corresponding on each, and is arranged on scrap (bridge) and multiple to be installed the corresponding anticreep hole of bar with each.
In other embodiments, the quantity of screw perforation can be accordingly increased or be reduced according to practical situation；Each
Screw perforation corresponds to a block piece ontology, and the bar that installs on each block piece ontology shares an anticreep hole；Stop structure can also be with
It is set as being provided with lockhole on installing bar, interior step is set in lockhole, and in above-mentioned gap in setting and insertion lockhole
And the barb with the cooperation of interior step block.
It is anti-in any embodiment of the embodiment of anticreep block piece according to the present invention, structure and above-mentioned connector
The structure of off-gear part is consistent, is no longer developed in details.
The embodiment of connector shell component according to the present invention, any embodiment of structure and above-mentioned connector
In connector shell component structure it is consistent, be no longer developed in details.
Claims (10)
1. anticreep block piece, it is characterised in that: including the block piece sheet being assemblied in for the axial activity along screw perforation on insulator
Body, block piece ontology, which is equipped with, to be cooperated for the axial direction along screw perforation with insulator limit block to prevent stop part ontology and insulation
The Stop structure of body separation, is additionally provided with for being blocked in screw movement routine to prevent screw from screw on the block piece ontology
The limiting section deviate from perforation.
2. anticreep block piece according to claim 1, it is characterised in that: the block piece ontology includes for being blocked in screw
The baffle of nut side, the limiting section are equipped with for screwdriver across the handle hole to load and unload screw, and the handle hole leans on
One end aperture edge of nearly screw constitutes the limiting section.
3. anticreep block piece according to claim 2, it is characterised in that: the handle hole is there are two more than, each handle hole
In arranged for interval on baffle.
4. described in any item anticreep block pieces according to claim 1 ~ 3, it is characterised in that: the anticreep block piece further includes that root is solid
It is scheduled on block piece ontology and for the bar that installs in the movable anticreep hole being threaded on insulator, the Stop structure, which is arranged, to be worn
It fills on bar.
5. anticreep block piece according to claim 4, it is characterised in that: the Stop structure includes that the top for installing bar is arranged in
The resilient barb for cooperating with the aperture edge block in anticreep hole at end.
6. anticreep block piece according to claim 5, it is characterised in that: for the resilient barb there are two more than, edge installs bar
Circumferentially-spaced arrangement.
7. anticreep block piece according to claim 3, it is characterised in that: the anticreep block piece further includes that root is fixed on block piece
Bar is installed in the anticreep hole being threaded on insulator on ontology and for activity, the Stop structure is arranged on installing bar,
Each handle hole is in the two sides arranged for interval that supports or opposes for installing bar.
8. connector shell component, including insulator, it is provided with screw perforation on insulator, is coated with screw in screw perforation,
It is characterized by: connector shell component further includes anticreep block piece, anticreep block piece includes the axial activity assembly along screw perforation
In the block piece ontology on insulator, block piece ontology be equipped with for along screw perforation axial direction and insulator limit block cooperate with
The Stop structure that anti-stop part ontology is separated with insulator is additionally provided with the mobile road for being blocked in screw on the block piece ontology
Limiting section in diameter to prevent screw from deviating from from screw perforation, the block piece ontology are small along the active strokes of screw perforation axial direction
In the abjection stroke of screw.
9. connector shell component according to claim 8, it is characterised in that: the block piece ontology includes for being blocked in
The baffle of the nut side of screw, the limiting section are equipped with for screwdriver across the handle hole to load and unload screw, the operation
One end aperture edge of the close screw in hole constitutes the limiting section.
10. connector, including insulator and setting, in the intracorporal crimping contact that insulate, insulator is equipped with screw perforation, spiral shell
Screw is coated in nail perforation, it is characterised in that: connector shell component further includes anticreep block piece, and anticreep block piece includes along screw
The axial activity of perforation is assemblied in the block piece ontology on insulator, and block piece ontology is equipped with for the axial direction along screw perforation and absolutely
Edge body limit block cooperates the Stop structure separated to prevent stop part ontology with insulator, is additionally provided with and is used on the block piece ontology
It is blocked in the limiting section in the movement routine of screw to prevent screw from deviating from from screw perforation, the block piece ontology is worn along screw
The active strokes of hole axial direction are less than the abjection stroke of screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155480.7A CN110190459B (en) | 2018-02-23 | 2018-02-23 | Connector housing assembly and anti-falling stopper and connector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155480.7A CN110190459B (en) | 2018-02-23 | 2018-02-23 | Connector housing assembly and anti-falling stopper and connector thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110190459A true CN110190459A (en) | 2019-08-30 |
| CN110190459B CN110190459B (en) | 2021-05-18 |
Family
ID=67713532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810155480.7A Active CN110190459B (en) | 2018-02-23 | 2018-02-23 | Connector housing assembly and anti-falling stopper and connector thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110190459B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI775485B (en) * | 2021-06-10 | 2022-08-21 | 英業達股份有限公司 | Connector assembly with cable limiting housing |
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| CN2554850Y (en) * | 2002-06-03 | 2003-06-04 | 李昆茂 | Quick connector structure of terminal box |
| CN200950471Y (en) * | 2006-07-05 | 2007-09-19 | 上海天逸电器有限公司 | Wire holder structure |
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| TWI775485B (en) * | 2021-06-10 | 2022-08-21 | 英業達股份有限公司 | Connector assembly with cable limiting housing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110190459B (en) | 2021-05-18 |
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