CN110718774B - Waterproof connection structure for electric wire and waterproof connection method for electric wire - Google Patents
Waterproof connection structure for electric wire and waterproof connection method for electric wire Download PDFInfo
- Publication number
- CN110718774B CN110718774B CN201910623510.7A CN201910623510A CN110718774B CN 110718774 B CN110718774 B CN 110718774B CN 201910623510 A CN201910623510 A CN 201910623510A CN 110718774 B CN110718774 B CN 110718774B
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- Prior art keywords
- splice
- heat
- shrinkable tube
- engaging portion
- side engaging
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
- H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
Abstract
The invention provides a waterproof connecting structure of an electric wire and a waterproof connecting method of an electric wire, which can prevent the damage of the protection and insulation functions of a conductor part caused by the exposure of the conductor part due to the deviation of a heat shrinkable tube covering the exposed part of the conductor including a splicing part even if the electric wire is placed in a high-temperature environment for a long time, and can easily position and install the heat shrinkable tube at an installation completion position. This waterproof connection structure of electric wire includes: a splice (10) with an engaging portion, which has a splice (11) formed at conductor-exposed portions (32) at the ends of a plurality of wires (30) and a splice-side engaging portion (12) formed concavely in the splice (11); and a heat-shrinkable tube (20) having a tube-side engaging portion (21) that engages with the splice-side engaging portion in a state in which the heat-shrinkable tube is mounted so as to cover the exposed portion of the conductor including the splice, and a heat-fusible layer (22) provided on an inner surface (20a) of the heat-shrinkable tube (20).
Description
Technical Field
The present invention relates to a waterproof connecting structure of an electric wire and a waterproof connecting method of an electric wire, which waterproof a conductor exposed portion where a plurality of electric wires are connected to each other.
Background
Conventionally, when a plurality of wires wired in a wire harness of an automobile are electrically connected to each other as branch connection portions of an electric circuit, exposed conductor portions of the plurality of wires are connected to each other after removing insulating coatings at terminal portions of the plurality of wires to expose conductor portions.
When such a wire harness is mounted on a vehicle, a heat-shrinkable tube is attached so as to cover a conductor exposed portion including a connection portion of a plurality of electric wires, thereby protecting and insulating the conductor portion.
For example, patent document 1 describes a waterproof connection structure of an electric wire in which a heat shrinkable tube having a heat-fusible layer provided on an inner surface thereof is attached so as to cover a conductor exposed portion including a core concentrated splice (splice) to a plurality of electric wires connected to each other by forming a core concentrated splice (splice) at a conductor exposed portion of a terminal portion from which an insulating coating is removed.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 11-233175
Disclosure of Invention
Technical problem to be solved by the invention
However, in the waterproof connection structure for an electric wire described in patent document 1, if the electric wire is left for a long time in a high-temperature environment such as a high-temperature environment in which the heat-fusible layer melts, the heat-fusible layer on the inner surface of the heat-shrinkable tube melts, and the heat-shrinkable tube shrinks and is displaced from a predetermined mounting completion position, and the conductor portion is exposed, and as a result, the function of protecting and insulating the conductor portion may be impaired.
In the waterproof connection structure for electric wires described in patent document 1, when the heat-shrinkable tube is attached so as to cover the exposed portion of the conductor including the splice, it is difficult to position the heat-shrinkable tube at the attachment completion position.
The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a waterproof connecting structure of an electric wire and a waterproof connecting method of an electric wire, which are capable of preventing functional damage of protection and insulation of a conductor part due to displacement of a heat shrinkable tube covering a conductor exposed portion including a splice part and exposure of the conductor part even if the heat shrinkable tube is left in a high-temperature environment for a long time, and of easily positioning and mounting the heat shrinkable tube at a mounting completion position.
Means for solving the problems
In order to solve the above problems and achieve the object, a waterproof connection structure for an electric wire according to the present invention includes: a splice with an engagement portion, the splice with the engagement portion comprising: a splice part formed by connecting a plurality of wires, each of which is formed by surrounding a conductor part with an insulating coating, to each other at conductor exposed portions of terminal parts of the plurality of wires from which the insulating coating is removed; and a splice-side engagement portion that is formed concavely in the splice portion; and a heat shrinkable tube including a tube-side engaging portion formed in a convex shape on an inner surface so as to be engaged with the splice-side engaging portion in a state where the heat shrinkable tube is mounted on the plurality of electric wires connected to each other by the splice so as to cover the conductor exposed portion including the splice, and a heat-fusible layer provided on the inner surface of the heat shrinkable tube.
In order to solve the above problems and achieve the object, a waterproof connecting method for an electric wire according to the present invention includes: a splice forming step of forming a concave splice side engagement portion in a splice portion connecting a plurality of wires, which are formed by surrounding a conductor portion with an insulating sheath, to each other, at a conductor exposed portion of the plurality of wires from which a terminal portion of the insulating sheath has been removed; a heat-shrinkable tube positioning and mounting step of positioning and mounting a heat-shrinkable tube so as to cover the exposed conductor portions of the plurality of wires including the splice while engaging the tube-side engaging portions with the splice-side engaging portions with respect to the plurality of wires connected to each other by the splice, the heat-shrinkable tube including a tube-side engaging portion formed convexly on an inner surface thereof so as to be engageable with the splice-side engaging portion, and a heat-fusible layer provided on the inner surface of the heat-shrinkable tube; and a heat-shrinkable tube heating step of applying heat for shrinking the heat-shrinkable tube to the heat-shrinkable tube positioned and attached by engaging the tube-side engaging portion with the splice-portion-side engaging portion in the heat-shrinkable tube positioning and attaching step.
Effects of the invention
In the waterproof connecting structure for an electric wire according to the present invention, since the pipe-side engaging portion and the splice-side engaging portion are engaged with each other in a state where the heat shrinkable tube is completely attached, it is possible to prevent the heat shrinkable tube from shrinking and shifting from a predetermined attachment completion position due to melting of the heat fusion layer when the heat shrinkable tube is left in a high-temperature environment for a long time.
In the waterproof connecting structure for electric wires according to the present invention, when the heat shrinkable tube is attached to the plurality of electric wires connected to each other by the splice so as to cover the exposed portion of the conductor including the splice, the tube-side engaging portion is engaged with the splice-side engaging portion, whereby the heat shrinkable tube can be positioned at the attachment completion position.
Therefore, the waterproof connecting structure of an electric wire according to the present invention can prevent the conductor part from being exposed due to displacement of the heat shrinkable tube covering the conductor exposed part including the splice part and the conductor part from being exposed, even when the structure is left in a high-temperature environment for a long time, and the function of protecting and insulating the conductor part from being impaired, and can easily position and mount the heat shrinkable tube at a mounting completion position.
In the waterproof connecting method for an electric wire according to the present invention, the heat-shrinkable tube is positioned and attached so as to engage the tube-side engaging portion formed in a concave shape on the inner surface of the heat-shrinkable tube in the heat-shrinkable tube positioning and attaching step, with respect to the concave-shaped splice portion-side engaging portion formed in the splice portion forming step with the engaging portion.
Therefore, in the waterproof connecting method of an electric wire according to the embodiment of the present invention, since the pipe-side engaging portion and the splice-portion-side engaging portion are engaged with each other, it is possible to prevent the heat shrinkable tube from shrinking and being displaced from the predetermined mounting position due to the melting of the heat fusion layer when left in a high-temperature environment for a long time.
In the waterproof connecting method for electric wires according to the present invention, when the heat shrinkable tube is attached to the plurality of electric wires connected to each other by the splice so as to cover the exposed portion of the conductor including the splice, the tube-side engaging portion is engaged with the splice-side engaging portion, so that the heat shrinkable tube can be positioned at the attachment completion position.
Therefore, the waterproof connecting method of an electric wire according to the present invention can prevent the conductor part from being exposed due to the displacement of the heat shrinkable tube covering the conductor exposed part including the splice part and the exposure of the conductor part, even when left in a high temperature environment for a long time, and the function of protecting and insulating the conductor part from being impaired, and can easily position and mount the heat shrinkable tube at a mounting completion position.
Drawings
Fig. 1A is a view of the waterproof connection structure of the electric wire according to the embodiment of the present invention, as viewed from above the splice-portion-side engagement portion in a state where the heat-shrinkable tube is viewed in cross section, and fig. 1B is a view of the waterproof connection structure of the electric wire according to the embodiment of the present invention, as viewed from a side of the splice-portion-side engagement portion in a state where the heat-shrinkable tube is viewed in cross section.
Fig. 2A is a view of the insulation coating around the exposed conductor portion and the exposed conductor portion including the splice portion with the engagement portion, as viewed from above the splice portion side engagement portion, and fig. 2B is a view of the insulation coating around the exposed conductor portion and the exposed conductor portion including the splice portion with the engagement portion, as viewed from the side of the splice portion side engagement portion.
Fig. 3 is a sectional view of a heat shrinkable tube.
Fig. 4A is a diagram for explaining a splice forming step, fig. 4B is a diagram for explaining a splice forming step of the tape engaging portion, fig. 4C is a diagram for explaining a heat-shrinkable tube mounting step, and fig. 4D is a diagram for explaining a heat-shrinkable tube heating step.
Detailed Description
Hereinafter, preferred embodiments of a waterproof connecting structure of an electric wire and a waterproof connecting method of an electric wire according to the present invention will be described in detail with reference to the accompanying drawings.
[ examples ]
Fig. 1A is a diagram of the waterproof connection structure 1 of the electric wire according to the embodiment of the present invention as viewed from above the splice-part-side engagement part 12 in a state where the heat-shrinkable tube is viewed in cross section, and fig. 1B is a diagram of the waterproof connection structure 1 of the electric wire according to the embodiment of the present invention as viewed from a side of the splice-part-side engagement part 12 in a state where the heat-shrinkable tube 20 is viewed in cross section. Fig. 2A is a view of the conductor exposed portion 32 including the splice 10 with the band engagement portion and the insulating coating 33 around the conductor exposed portion 32 from the upper side of the splice side engagement portion 12, and fig. 2B is a view of the conductor exposed portion 32 including the splice 10 with the band engagement portion and the insulating coating 33 around the conductor exposed portion 32 from the side of the splice side engagement portion 12. Fig. 3 is a sectional view of the heat shrinkable tube 20.
The waterproof connection structure 1 for electric wires according to the embodiment of the present invention is configured to be disposed outdoors, for example, as branch connection portions of a plurality of electric wires 30 wired in a wire harness of a vehicle, and particularly, to be disposed in a place left in a high-temperature environment for a long time.
The waterproof connection structure 1 for electric wires has a splice 10 with an engagement portion and a heat-shrinkable tube 20, and the splice 10 with the engagement portion includes: a splice 11 formed by connecting a plurality of wires 30 to each other at conductor exposed portions 32 of the plurality of wires 30, from which end portions of the insulation coating 33 have been removed, the conductor portions 31 being surrounded by the insulation coating 33; and a splice side engaging portion 12, the splice side engaging portion 12 being formed in a recessed shape at the splice 11, the heat shrinkable tube 20 including a tube side engaging portion 21 formed in a projecting shape on an inner surface 20a so as to be engageable with the splice side engaging portion 12, and a heat fusion layer 22 being provided on the inner surface 20 a.
First, the splice 10 with the tape engaging portion will be described.
The splice 11 is a portion in which the conductor portions 31 of the plurality of wires 30 are connected by, for example, thermocompression bonding (diffusion bonding), solder bonding, or ultrasonic bonding. In this embodiment, the splice 11 connects the conductor portions 31 of the plurality of wires 30 by thermocompression bonding.
In this embodiment, the conductor portion 31 of the electric wire 30 is a portion constituting a core wire formed by bundling a plurality of single wires 31a containing conductivity of aluminum, copper, or the like.
The conductor portion 31 is not limited to a member formed by bundling a plurality of element wires 31a, and may be a member formed by a single core wire.
In addition, in this embodiment, a structure in which 3 electric wires 30 are connected to each other is exemplified, but the number of the electric wires 30 connected to each other is not limited thereto, and may be 2 or 3 or more.
The splice 11 is a portion where the plurality of wires 30 are connected to each other by heating and crimping the conductor portions 31 exposed at the distal end portions of the plurality of wires 30 in a state of being closely joined to each other using a press machine not shown.
The splice side engagement portion 12 is a portion that engages with the pipe side engagement portion 21, and is formed in a concave shape on the outer surface 11a of the splice 11.
Next, the heat shrinkable tube 20 will be described.
The heat shrinkable tube 20 is a bottomed cylindrical member including a heat shrinkable insulating material, and has a heat fusion layer 22 provided on an inner surface thereof.
The heat shrinkable tube 20 may be a bottomless tubular member.
The heat shrinkable tube 20 is attached to a plurality of electric wires 30 connected to each other by the splice portions 11 so as to cover a conductor exposed portion 32 including the splice portions 11 and a region of the conductor portion 31 around the conductor exposed portion 32 surrounded by an insulating coating 33.
The tube-side engaging portion 21 is formed in a convex shape on the inner surface 20a so as to be engageable with the splice-side engaging portion 12 in a state of being mounted on a plurality of electric wires 30 connected to each other by the splice 11 in a manner such that the conductor exposed portion 32 including the splice 11 and the conductor portion 31 around the conductor exposed portion 32 are covered with a region surrounded by the insulating coating 33.
The tube-side engaging portion 21 is a portion formed by depressing a part of the outer surface 20b of the heat shrinkable tube 20 and pressing the inner surface 20a of the heat shrinkable tube 20 in a convex shape.
Next, a waterproof connecting method of an electric wire according to an embodiment of the present invention will be described with reference to fig. 4.
Fig. 4A is a diagram for explaining a splice forming step, fig. 4B is a diagram for explaining a splice forming step of the tape engaging portion, fig. 4C is a diagram for explaining a heat-shrinkable tube positioning and attaching step, and fig. 4D is a diagram for explaining a heat-shrinkable tube heating step.
First, as a splice forming step, a splice 11 (see fig. 4A) to be a connection portion of the electric wire 30 is formed.
In the splice forming step, the conductor portions 31 of the conductor exposed portions 32 of the plurality of wires 30 from which the insulating coatings of the terminal portions have been removed are joined together in a close-coupled state by heating with a press machine, not shown, to form the splice 11.
In the joint forming step, the joint 11 is formed by thermocompression bonding (diffusion bonding), but the joint 11 is not limited to this, and the joint 11 may be formed by welding or ultrasonic bonding.
Next, as a splice forming step of the tape engaging portion, a splice side engaging portion 12 (see fig. 4B) which becomes a portion to be engaged with the pipe side engaging portion 21 is formed.
In the step of forming the splice of the tape engagement portion, a concave splice-side engagement portion 12 is formed on the outer surface 11a of the splice 11 using a press machine, not shown.
Next, as a heat-shrinkable tube positioning and attaching step, the heat-shrinkable tube 20 is attached to the plurality of electric wires 30 connected to each other by the splice 11 (see fig. 4C).
In this heat-shrinkable tube positioning and mounting step, the plurality of wires 30 connected to each other by the splice 11 are positioned and mounted so that the exposed conductor portions 32 of the plurality of wires 30 including the splice 11 are covered while the tube-side engaging portion 21 and the splice-side engaging portion 12 are engaged with each other.
In this heat-shrinkable tube positioning and mounting step, the heat-shrinkable tube 20 can be positioned and mounted by engaging the tube-side engaging portion 21 with the splice-portion-side engaging portion 12.
When the heat shrinkable tube 20 is made of a material having translucency such as colorless transparency, for example, an operator can engage the tube-side engaging portion 21 with the splice-side engaging portion 12 while visually checking the relative positional relationship between the tube-side engaging portion 21 and the splice-side engaging portion 12 in the process of attaching the heat shrinkable tube 20.
When the heat shrinkable tube 20 is made of an opaque material such as black, for example, the operator can engage the tube-side engaging portion 21 with the splice-side engaging portion 12 by making the tube-side engaging portion 21 collide with the splice-side engaging portion 12.
Finally, as the heat-shrinkable tube heating step, high-temperature heat is applied to the heat-shrinkable tube 20 that has been positioned and attached, thereby shrinking the heat-shrinkable tube 20 (see fig. 4D).
In this heat-shrinkable tube heating step, high-temperature heat is applied to the heat-shrinkable tube 20 positioned and attached by the tube-side engaging portion 21 engaging with the splice-portion-side engaging portion 12, so that the heat-shrinkable tube 20 is shrunk and the heat-fusible layer 22 provided on the inner surface 20a of the heat-shrinkable tube 20 is melted.
The heat shrinkable tube 20 is shrunk in such a manner that the heat shrinkable tube 20 can follow the portion covered with the heat shrinkable tube 20.
In addition, the hot melt layer 22 is filled between the inner surface 20a of the heat shrinkable tube 20 and the portion covered by the heat shrinkable tube 20 and solidified after being melted.
Therefore, the pipe-side engaging portion 21 can follow the splice-side engaging portion 12, and therefore the engagement state with the splice-side engaging portion 12 is further strengthened.
In the above description of the waterproof connection method for electric wires, the splice 11 and the splice side engagement portion 12 are formed separately, but in the case where a press is used to form the splice 11 as in the case where the splice 11 is formed by thermal compression, the splice 11 and the splice side engagement portion 12 may be formed together in one step as a splice forming step of the tape engagement portion.
In the waterproof connection structure 1 for an electric wire according to the embodiment of the present invention, since the tube-side engaging portion 21 and the splice-side engaging portion 12 are engaged with each other in a state where the heat shrinkable tube 20 is completely attached, the heat shrinkable tube 20 is prevented from shrinking and shifting from a predetermined attachment completion position due to melting of the heat fusion layer 22 when left in a high-temperature environment for a long time.
In the waterproof connection structure 1 for electric wires according to the present invention, when the heat shrinkable tube 20 is attached to the plurality of electric wires 30 connected to each other by the splice 11 so as to cover the conductor exposed portion 32 including the splice 11, the tube-side engaging portion 21 is engaged with the splice-side engaging portion 12, and is positioned at the attachment completion position.
Therefore, the waterproof connecting structure 1 for electric wires according to the present invention can prevent the conductor part 31 from being exposed due to displacement of the heat shrinkable tube 20 covering the conductor exposed part 32 including the splice part 11 even when it is left in a high temperature environment for a long time, and the function of protecting and insulating the conductor part 31 from being impaired, and can easily position and mount the heat shrinkable tube 20 at the mounting completion position.
In the waterproof connection method for an electric wire according to the embodiment of the present invention, the heat shrinkable tube 20 is positioned and attached so as to engage the tube side engaging portion 21 formed in a concave shape on the inner surface 20a of the heat shrinkable tube 20 in the heat shrinkable tube positioning and attaching step, with respect to the concave shaped splice side engaging portion 12 formed on the splice 11 in the splice forming step with an engaging portion.
Therefore, in the waterproof connecting method of an electric wire according to the embodiment of the present invention, since the pipe-side engaging portion 21 and the splice-side engaging portion 12 are engaged, it is prevented that the heat shrinkable tube 20 shrinks and is displaced from the predetermined mounting position due to the fusion of the heat fusion layer 22 when left in a high-temperature environment for a long time.
In the waterproof connection method for electric wires according to the present invention, when the heat shrinkable tube 20 is attached to the plurality of electric wires 30 connected to each other by the splice 11 so as to cover the conductor exposed portion 32 including the splice 11, the tube-side engaging portion 21 is engaged with the splice-side engaging portion 12, and thus the position can be determined at the attachment completion position.
Therefore, the waterproof connecting method of an electric wire according to the present invention can prevent the function of protecting and insulating the conductor part 31 from being damaged by the displacement of the heat shrinkable tube 20 covering the conductor exposed portion 32 including the splice 11 and the exposure of the conductor part 31 even when the electric wire is left in a high temperature environment for a long time, and can easily position and mount the heat shrinkable tube 20 at the mounting completion position.
The present invention has been described specifically based on the embodiments of the invention described above, but the present invention is not limited to the embodiments of the invention described above, and various modifications can be made without departing from the scope of the invention.
Claims (1)
1. A method of water-proof connection of electrical wires, comprising:
a splice forming step of forming a concave splice side engagement portion in a splice portion connecting a plurality of wires, which are formed by surrounding a conductor portion with an insulating sheath, to each other, at a conductor exposed portion of the plurality of wires from which a terminal portion of the insulating sheath has been removed;
a heat-shrinkable tube positioning and mounting step of positioning and mounting a heat-shrinkable tube, which has a tube-side engaging portion formed convexly on an inner surface of the heat-shrinkable tube so as to be engageable with the splice-portion-side engaging portion, and which is provided with a heat-fusible layer on the inner surface, the heat-shrinkable tube being positioned and mounted with respect to the plurality of electric wires connected to each other by the splice portion so as to cover the conductor exposed portions of the plurality of electric wires including the splice portion while engaging the tube-side engaging portion with the splice-portion-side engaging portion; and
a heat-shrinkable tube heating step of applying heat for shrinking the heat-shrinkable tube to the heat-shrinkable tube positioned and attached in the heat-shrinkable tube positioning and attaching step by engaging the tube-side engaging portion with the splice-portion-side engaging portion,
the tube-side engaging portion of the heat shrinkable tube used in the heat shrinkable tube positioning and attaching step is formed by depressing a part of an outer surface of the heat shrinkable tube toward an inner side of the heat shrinkable tube and extruding the inner surface of the heat shrinkable tube in a convex shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018131327A JP6823623B2 (en) | 2018-07-11 | 2018-07-11 | Waterproof connection structure of electric wire and waterproof connection method of electric wire |
| JP2018-131327 | 2018-07-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110718774A CN110718774A (en) | 2020-01-21 |
| CN110718774B true CN110718774B (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910623510.7A Active CN110718774B (en) | 2018-07-11 | 2019-07-11 | Waterproof connection structure for electric wire and waterproof connection method for electric wire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6823623B2 (en) |
| CN (1) | CN110718774B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650253U (en) * | 1992-06-22 | 1994-07-08 | 株式会社ニチフ端子工業 | Wire connection sleeve |
| JPH117998A (en) * | 1997-06-11 | 1999-01-12 | Minnesota Mining & Mfg Co <3M> | Cover tube for wire connection part and wire connection device |
| CN202042622U (en) * | 2010-12-28 | 2011-11-16 | 深圳市宏商材料科技股份有限公司 | Thermal shrinkage sealing cap with glue |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127575U (en) * | 1985-01-30 | 1986-08-11 | ||
| JP3364882B2 (en) * | 1997-12-12 | 2003-01-08 | 矢崎総業株式会社 | Sealing method and sealing structure of wire connection |
| JP2001258142A (en) * | 2000-03-09 | 2001-09-21 | Sumitomo Wiring Syst Ltd | Protective structure of end concentrated welded part of electric wire group |
| US9960503B2 (en) * | 2015-02-20 | 2018-05-01 | Jeremy Sviben | Method of stranded electrical wire connection |
-
2018
- 2018-07-11 JP JP2018131327A patent/JP6823623B2/en active Active
-
2019
- 2019-07-11 CN CN201910623510.7A patent/CN110718774B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650253U (en) * | 1992-06-22 | 1994-07-08 | 株式会社ニチフ端子工業 | Wire connection sleeve |
| JPH117998A (en) * | 1997-06-11 | 1999-01-12 | Minnesota Mining & Mfg Co <3M> | Cover tube for wire connection part and wire connection device |
| CN202042622U (en) * | 2010-12-28 | 2011-11-16 | 深圳市宏商材料科技股份有限公司 | Thermal shrinkage sealing cap with glue |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110718774A (en) | 2020-01-21 |
| JP6823623B2 (en) | 2021-02-03 |
| JP2020009685A (en) | 2020-01-16 |
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