JP2002305065A - Sealing method between connector terminal insertion opening and electric wire, and waterproofing connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing method between connector terminal insertion openings and electric wires, which can perform highly efficient sealing easily, to small portions as belles to diversifill forms, and a waterproofing connector. SOLUTION: Through insertion openings 21, connector terminals 3 are attached in a housing 2, and liquefied rubber is filled up by a dispenser in gaps between the electric wires 4 which are connected to the connector terminals 3, and the insertion opening 21. Then, hardening the liquefied rubber that is filled up forms rubber-like elastic bodies 1. Here, the rubber-like elastic body 1 is made to have a storage elastic coefficient of 10<4> to 10<7> Pa, range of a loss elastic modulus of 10<3> to 10<6> Pa, and exfoliation power against covering of the housing 2 and the electric wires 4 of 0.05 N/cm or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing method between a connector terminal insertion opening and an electric wire and a waterproof connector.

[0002]

2. Description of the Related Art As a connector for making an electrical connection, a waterproof connector having a waterproof structure is widely known in order to prevent water or the like from entering a connection portion of a connector terminal.

In such a waterproof connector, it is generally necessary to seal a gap between an electric wire connected to a connector terminal and a connector terminal insertion port provided in a housing.

[0004] As such a sealing method, a technique of sealing with a rubber stopper vulcanized and molded using a mold (for example, a technique disclosed in JP-A-2000-291801), There has been a technique of filling and sealing a potting resin (for example, a technique disclosed in Japanese Patent Application Laid-Open No. H11-329570).

Further, as disclosed in Japanese Patent Application Laid-Open No. 64-63282, a plurality of holes are provided in a gel-like sealant using a gel-like molding material, and a terminal is formed in the hole. There is also a technique of inserting a gel-like sealing agent and sealing it by compression.

[0006]

However, in the case of the above-described prior art, the following problems have occurred.

In the case of the above-mentioned method using a rubber stopper,
It is necessary to mold rubber stoppers to correspond to the connector and electric wire size to be used, so that a mold corresponding to each is required, and there is a problem that it is difficult to cope with miniaturization and multipolarization of connectors. .

In addition, since a cavity for inserting a rubber plug into the housing is required, the size of the connector is correspondingly increased, which also hinders downsizing of the connector. Further, there is also a need for a work process of attaching a rubber stopper to an electric wire and attaching a rubber stopper to a housing, so that there is a problem that workability is poor.

Further, in the case of the above-mentioned method of filling the potting resin, it is necessary to sufficiently adhere to the housing material and the covering material of the electric wire. There was a problem that it was not sealed.

For example, an epoxy resin is generally used as a potting resin. In this case, however, sufficient sealing performance cannot be obtained due to poor adhesion to an olefin-based wire coating material. In addition, since epoxy resin is hard, when the electric wire is twisted or violently moved, a gap may be generated at the interface between the epoxy resin and the coating of the electric wire, and leakage may occur.

In the case of the above-mentioned method using a gel-like molding material, when the terminal is inserted into the hole provided in the sealing agent, the sealing agent is damaged and the sealing performance is reduced. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a high-performance device for a wide variety of shapes and small spaces. An object of the present invention is to provide a method of sealing between a connector terminal insertion opening and an electric wire and a waterproof connector which can easily perform sealing.

[0013]

According to the present invention, there is provided a method of sealing between a connector terminal insertion opening and an electric wire, the method comprising the steps of: providing an electric wire connected to a connector terminal; The gap between the connector terminal insertion port
Storage elastic modulus is 10 ⁴ to 10 ⁷ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, peel strength for the coating material of the housing material and the wire are sealed with rubber-like elastic material is 0.05 N / cm or more, a method of sealing between the connector terminal insertion openings and wire After attaching the connector terminal to the housing via the connector terminal insertion port, a liquid as a material of the rubber-like elastic body is provided in a gap between the electric wire connected to the connector terminal and the connector terminal insertion port. It is characterized by comprising a step of filling the rubber and a step of curing the filled liquid rubber to form the rubber-like elastic body.

The peeling force is a value obtained by a measuring method carried out according to a 180-degree peeling method according to JIS Z 0237. The same applies to the following.

Therefore, since the sealing method is such that the liquid rubber is filled in the portion to be sealed, the method is simpler than the case where a rubber stopper or the like is used, regardless of the shape and size of the portion to be sealed. Can be sealed. The rubber-like elastic body has a storage elastic modulus of 10 ⁴ to 10 ⁷ Pa and a loss elastic modulus of 10 4.
³ Pa to 10 ⁶ Pa, since the peeling force of the housing material and the electric wire against the covering material is 0.05 N / cm or more, the adhesive force is sufficiently maintained, and the deformation of the rubber is reduced to the degree that the sealing property can be maintained. Can be suppressed.

According to another aspect of the present invention, there is provided a method of sealing between a connector terminal insertion opening and an electric wire, the method comprising the steps of: connecting an electric wire connected to a connector terminal to a connector terminal provided in a housing; the gap between the mouth, storage modulus 10 ⁴ to 10 ⁷ Pa, a loss modulus 10 ³ Pa to 10 ⁶
A method for sealing between a connector terminal insertion opening and an electric wire, wherein the sealing is performed with a rubber-like elastic body having a peel force of 0.05 N / cm or more with respect to a covering material of the housing material and the electric wire. On the outer peripheral surface of the wire connected to
A step of applying a liquid rubber as a material of the rubber-like elastic body, and after attaching the connector terminal to a housing,
Curing the applied liquid rubber to form the rubber-like elastic body.

Therefore, after applying the liquid rubber to the electric wire,
Since the connector terminal is sealed after being attached to the housing, it can be easily sealed irrespective of the shape and size of the portion to be sealed as compared with the case where a rubber stopper or the like is used. The rubber-like elastic body has a storage elastic modulus of 10 ⁴
〜１０10 ⁷ Pa, loss elastic modulus 10 ³ Pa〜１０10 ⁶ Pa, peeling force against housing material and covering material of electric wire is 0.
Since it is more than 05 N / cm, the adhesive strength is sufficiently maintained,
In addition, deformation of the rubber can be suppressed to such an extent that the sealing property can be maintained.

According to another aspect of the present invention, there is provided a method for sealing between a connector terminal insertion opening and an electric wire, the method comprising the steps of: connecting an electric wire connected to a connector terminal to a connector terminal provided on a housing; the gap between the mouth, storage modulus 10 ⁴ to 10 ⁷ Pa, a loss modulus 10 ³ Pa to 10 ⁶
A method for sealing between a connector terminal insertion opening and an electric wire, wherein the sealing is performed with a rubber-like elastic body having a peel force of 0.05 N / cm or more with respect to a covering material of the housing material and the electric wire. On the outer peripheral surface of the wire connected to
A step of applying a liquid rubber as a material of the rubber-like elastic body, a step of curing the applied liquid rubber to form the rubber-like elastic body, and connecting the connector terminal to the housing via the connector terminal insertion opening. Mounting step.

Therefore, after applying the liquid rubber to the electric wire,
After this is cured, the connector terminal is attached to the housing and sealed.Therefore, compared to the case where a rubber stopper or the like is used, regardless of the shape and size of the portion to be sealed,
It can be easily sealed. The rubber-like elastic body is
Storage elastic modulus is 10 ⁴ to 10 ⁷ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, since the peeling force to the coating material of the housing material and the wire is at 0.05 N / cm or more, the adhesive strength was sufficiently maintained, and the deformation of the rubber, suppressed enough to maintain sealing performance be able to.

According to another aspect of the present invention, there is provided a method of sealing between a connector terminal insertion port and an electric wire, the method comprising the steps of: connecting an electric wire connected to a connector terminal to a connector terminal provided in a housing; the gap between the mouth, storage modulus 10 ⁴ to 10 ⁵ Pa, a loss modulus 10 ³ Pa to 10 ⁶
A method for sealing between a connector terminal insertion opening and an electric wire, wherein the sealing is performed with a rubber-like elastic body having a peel force of 0.05 N / cm or more with respect to a covering material of the housing material and the electric wire. On the outer peripheral surface of the wire connected to
The method includes a step of winding a rubber-like elastic body in a tape or sheet shape, and a step of attaching a connector terminal to a housing via the connector terminal insertion port after winding the rubber-like elastic body.

Therefore, since the tape or sheet-like rubber-like elastic body is wrapped around the electric wire and the connector terminal is attached to the housing and sealed, a portion to be sealed is smaller than when a rubber stopper or the like is used. Irrespective of the shape and size of the device. The rubbery elastic body has a storage elastic modulus of 10 ⁴ to 10 ⁵ Pa and a loss elastic modulus of 1 Pa.
0 ³ Pa to 10 ⁶ Pa, since the peeling force of the housing material and the electric wire covering material is 0.05 N / cm or more,
The adhesive strength can be sufficiently maintained, and the deformation of the rubber can be suppressed to such an extent that the sealing property can be maintained.

Further, in the waterproof connector of the present invention,
A housing provided with a connector terminal insertion port, a connector terminal attached to the housing through the connector terminal insertion port, a wire connected to the connector terminal, and a gap between the connector terminal insertion port. In the waterproof connector provided with a rubber-like elastic body that stops, the rubber-like elastic body has a storage elastic modulus of 10 ⁴ to 10 ⁷ Pa, a loss elastic modulus of 10 ³ Pa to 10 ⁶ Pa, a housing material, and a covering material of an electric wire. A peel force of 0.05 N / cm or more.

Therefore, the rubber-like elastic body has a storage elastic modulus of 1
0^Four-10^FivePa, loss elastic modulus is 10 ^ThreePa-10⁶Pa,
Release force against housing material and wire coating
Since it is 0.05 N / cm or more, sufficient adhesive strength is maintained
Rubber deformation to the extent that sealing performance can be maintained.
Can be obtained.

[0024]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The material, shape, relative arrangement, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

First, a waterproof connector according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic sectional view of a waterproof connector according to an embodiment of the present invention. Although only the male-side connector is shown in the figure, the female-side connector has the same sealing structure, although the terminal shape and connector shape are different.

As shown, a waterproof connector 10 according to the present embodiment includes a housing 2 having an insertion port 21 for a connector terminal, a connector terminal 3 attached to the housing 2, and an electric wire connected to the connector terminal 3. , Rubber-like elastic body 1 for sealing a gap between electric wire 4 and insertion port 21
And.

Housing 2, connector terminal 3, and electric wire 4
Since a general technique can be applied to, detailed description thereof is omitted here. In addition, about these members,
In the present invention, not only the illustrated example but also various configurations can be applied.

The rubber-like elastic body 1 has a storage elastic modulus of 10 ⁴ or more.
10 ⁷ Pa can be applied, and in particular, 10 ⁵ Pa to 10 ⁶
The thing of Pa is suitable.

If the storage elastic modulus is larger than this range, the resin becomes too hard, the adhesive strength is reduced, and the adhesive strength with the housing 2 and the coating with the electric wire 4 are reduced. . For example, in the case of a rubber having a high degree of crosslinking or a highly filled rubber, the adhesiveness is poor, and the rubber easily peels off from the housing 2 or the electric wire 4 to easily cause leakage.

On the other hand, if the storage elastic modulus is smaller than this range, it becomes easy to deform. For example, in the case of uncrosslinked rubber, if pressure is applied to the rubber and the rubber is excessively deformed (flowed), a gap is formed and leakage is likely to occur.

Further, the rubber-like elastic body 1 is in the range of the loss modulus to apply those 10 ³ to 10 ⁶ Pa, particularly, 10 ⁴
Those having a pressure of 〜１０10 ⁵ Pa are preferred.

If the loss elastic modulus is larger than this range, it becomes difficult to adhere to the coating of the housing 2 and the electric wire 4 and leakage due to peeling is liable to occur.

On the other hand, when the loss modulus is smaller than this range, leakage due to peeling and leakage due to deformation or breakage of rubber are likely to occur.

As described above, if the storage elastic modulus and the loss elastic modulus are in the above ranges, the adhesive strength can be in an appropriate range, and the deformation amount of rubber can be in an appropriate range. Therefore, it is possible to suitably prevent leakage.

Further, the rubber-like elastic body 1 needs to exhibit good adhesiveness to the coating of the housing 2 and the electric wire 4. Here, as a measure of the adhesive property, the peeling force against the coating of the housing 2 and the electric wire 4 is 0.05 N / c.
m or more, and more preferably 0.25 N / cm or more.

Accordingly, the rubber-like elastic body 1 is
It is necessary that the material described above and the material of the coating of the electric wire 4 have the above properties. The material of the housing 2 includes, for example, a polyamide resin and an alloy thereof, and the coating of the electric wire 4 includes an olefin-based material such as polyvinyl chloride or polyethylene.

Examples of the material of the rubber-like elastic body 1 include, for example, a halogenated butyl rubber or a polymer blend composition of butyl rubber as disclosed in Japanese Patent Publication No. 55-41651, Japanese Patent Application Laid-Open No. 2-269157. JP-A-11-315270, a silicone rubber-based material such as a composition comprising a silicone rubber and a pressure-sensitive adhesive as disclosed in JP-A-11-188558 and JP-A-7-188558.
An acrylic rubber-based composition composed of a (meth) acrylate, an olefin-based polymer, and a tackifier as disclosed in Japanese Patent Application Laid-Open Publication No. H10-260, can be applied.

Other examples include block polymers such as styrene, isoprene, and styrene, and acrylate-based styrene block copolymers (JP-B-59-3314).
No. 8, disclosed in Japanese Unexamined Patent Publication No. 8), or a flexible and sticky urethane gel.

Next, three embodiments of a sealing method between the connector terminal insertion opening and the electric wire will be described.

(First Embodiment) Referring to FIG. 2, a method for sealing a connector terminal insertion opening and an electric wire according to a first embodiment of the present invention will be described. FIG. 2 is a process diagram showing a process of a sealing method between the connector terminal insertion opening and the electric wire according to the first embodiment of the present invention.

First, the connector terminal 3 is attached to the housing 2 through the insertion opening 21 as shown in FIGS. Then, as shown in (c), the liquid rubber 1 is inserted into the gap between the electric wire 4 connected to the connector terminal 3 and the insertion port 21 by the dispenser 20 as an injection device.
Fill a.

Thereafter, the filled liquid rubber 1a is cured to form a rubber-like elastic body 1 (FIG. 1).

Here, the viscosity of the material of the liquid rubber 1a is 1
Those having a value of from 0 ³ to 10 ⁵ mPa · s can be suitably used.

If the diameter is smaller than this range, the liquid rubber 1a may flow into a portion other than a desired portion such as a portion where the connection portion of the connector terminal 3 is accommodated, which is not preferable. On the other hand, if it is larger than this range, the gap between the electric wire 4 connected to the connector terminal 3 and the insertion port 21 may not be sufficiently filled with the liquid rubber 1a,
The expected effect may not be obtained.

The viscosity of the material of the liquid rubber 1a is preferably within the above range and suitably selected according to the size of the gap to be filled. Further, it is more preferable that the material has a thixotropic property such that the viscosity at the time of injection is low and the viscosity increases after the injection.

As the method for curing the liquid rubber 1a, any of a room temperature curing type, a heat curing type, a moisture curing type and an ultraviolet curing type can be selected. Is more effective because the curing speed is high and the productivity is excellent. Note that two or more of the above may be used in combination.

As described above, according to the sealing method of the present embodiment, the shape and size of the sealing portion are reduced as compared with the case where a rubber stopper or the like that requires a shape and size corresponding to the sealing portion is used. Regardless, it can be easily sealed.

Further, since a cavity for enclosing the sealing agent is not particularly required, it is easy to cope with the miniaturization of the connector and the increase in the number of terminals (multiple poles), and it is possible to cope with connectors of various shapes.

Further, the step of inserting the rubber plug into the housing as in the case of the rubber plug is not required.

Moreover, as described above, since the adhesive is adhered to the housing material and the electric wire covering material, a sufficient sealing performance can be exhibited with a small amount of the sealing material. In addition, since the sealing agent is a rubber-like elastic body that is elastically deformed, the sealing agent exhibits stable sealing performance even when the electric wire is twisted.

(Second Embodiment) Referring to FIG. 3, a method of sealing between a connector terminal insertion opening and an electric wire according to a second embodiment of the present invention will be described. FIG. 3 is a process diagram showing a process of a sealing method between a connector terminal insertion opening and an electric wire according to a second embodiment of the present invention.

First, as shown in FIGS. 3A and 3B,
Before attaching the connector terminal 3 to the housing 2, a liquid rubber 1 b is applied to the outer peripheral surface of the electric wire 4.

Then, in this state, after attaching the connector terminal 3 to the housing 2, the liquid rubber 1b is cured to form the rubber-like elastic body 1 (FIG. 3C).

As shown in FIGS. 3A and 3B,
Before attaching the connector terminal 3 to the housing 2, a liquid rubber 1 b is applied to the outer peripheral surface of the electric wire 4 and then cured to form a rubber-like elastic body 1. It can be attached (FIG. 3C).

However, in the latter case, the connector terminal 3
When the rubber is attached to the housing 2, the rubber has a lower storage elastic modulus so that the rubber suitably follows the shape of the gap (uneven shape) so that the rubber-like elastic body 1 suitably fills and seals the gap. (10 ⁴ to 10 ⁵ Pa) is preferred. For example, a soft material having a low crosslinking density is suitable.

Here, the viscosity of the material of the liquid rubber 1a and the method of curing the liquid rubber 1a are the same as those in the first embodiment, so that the description is omitted.

As described above, in the case of the present embodiment, the same effect as in the case of the first embodiment can be obtained.

(Third Embodiment) Referring to FIG. 4, a method for sealing a connector terminal insertion opening and an electric wire according to a third embodiment of the present invention will be described. FIG. 4 is a process diagram showing a process of a sealing method between a connector terminal insertion opening and an electric wire according to a third embodiment of the present invention.

First, as shown in FIGS. 4A and 4B,
Before attaching the connector terminal 3 to the housing 2, a tape or sheet-like viscous rubber-like elastic body 1 c is wound around the outer peripheral surface of the electric wire 4.

Then, in this state, the connector terminal 3 is attached to the housing 2 (FIG. 4C).

However, in this case, when the connector terminal 3 is attached to the housing 2, rubber is suitable for the shape of the gap (uneven shape) so that the rubber-like elastic body 1 suitably fills and seals the gap. It is preferable that the storage elastic modulus of the rubber is lower (10 ⁴ to 10 ⁵ Pa) in order to follow the above. For example, a soft material having a low crosslinking density is suitable.

The viscosity of the material of the liquid rubber 1a,
The method of curing a is the same as in the first embodiment, and a description thereof will be omitted.

As described above, in the case of the present embodiment, the same effect as in the case of the first embodiment can be obtained.

[0064]

Next, a more specific example based on the above embodiment will be described. Here, various evaluation results for various materials are shown.

First, the characteristics of the materials used for the evaluation are shown in FIG. FIG. 5 is a table showing characteristics of materials used for evaluation.

In FIG. 5, regarding the materials of the sealants 1 to 8,
The respective storage elastic modulus (E '), loss elastic modulus (E "), and peel force for various materials are shown.

More specifically, the elastic modulus was measured by placing the sealant in a Teflon mold and curing it in a sheet shape, and thereafter, the storage elastic modulus (E ′) and the loss elastic modulus (E ′) during shear deformation. ”)
Was measured. For the measurement, a viscoelasticity measuring device DM made by SII was used.
This was performed using S110.

The peeling force was measured by applying a sealing agent to a PET film and curing it to obtain an adhesive tape. After attaching the adherend film to the tape, peeling it off by 180 degrees, the adhesive force ( (Peeling force) was measured. The measurement of the peeling force was performed according to JIS Z0237. Note that polyamide resin, polyvinyl chloride, and polyethylene were used as the material of the adherend film.

The material of each sealant is sealant 1 to sealant 1
Reference numeral 6 denotes a photocurable acrylic liquid rubber, sealing agent 7 is a silicone sealant, and sealing agent 8 is urethane gel.

FIG. 6 is a table showing the evaluation results of various evaluations.

As an evaluation test, a water seepage test and a pressure resistance test were performed.

In the water seepage test, the electric wire was bent at 90 degrees with respect to the waterproof connector sealed with a sealant, and water was allowed to flow through the electric wire. It was confirmed whether water seeping was seen.

The pressure test was performed by connecting both male and female waterproof connectors after sealing with a sealant,
Three ends of the insulated wires inserted one by one were sealed with a sealant, and a sealing tape was wound thereon. Then, the remaining unsealed insulated wire was connected to an air pipe with a pressure regulating valve, air was flowed into the connector, and the pressure when leakage occurred from the sealed portion was measured. The evaluation was made for each of the state where the covered electric wire was stopped without moving during the measurement and the case where the covered electric wire was bent or twisted at 90 degrees.

The samples used for the evaluation are as follows.
Note that a plurality of examples based on the above-described embodiment and a comparative example that is not based on the embodiment were adopted as samples.

(Example 1) In this example, the above-mentioned sealant 1 was used as the sealant.

The sealing method was performed based on the sealing method of the first embodiment.

More specifically, as shown in FIG. 2, the connector terminals 3 respectively connected to the ends of the two PVC-coated electric wires 4 are attached to the housing 2 through the insertion ports 21.

Then, the gap between the electric wire 4 and the insertion port 21 is filled with the liquid rubber 1a (sealant 1) by the dispenser 20, and then exposed to ultraviolet light for 1 minute to cure it. A sample was obtained. In addition, ultraviolet irradiation,
The accumulated light was set to 6000 mJ / cm ² using a spot UV irradiation device manufactured by Ushio Inc.

Example 2 A sample was obtained in the same manner as in Example 1 except that the sealing agent 2 was used as the sealing agent.

Example 3 Example 1 was repeated except that the above-mentioned sealant 2 was used as the sealant and the PE-coated electric wire was used as the electric wire.
A sample was obtained in the same manner as described above.

Example 4 Example 1 was repeated except that the sealing agent 3 was used as the sealing agent and the PE-coated electric wire was used as the electric wire.
A sample was obtained in the same manner as described above.

(Example 5) In this example, the sealing agent 2 was used as the sealing agent.

The sealing method was performed based on the sealing method of the second embodiment.

More specifically, as shown in FIG. 3, after applying the liquid rubber 1b (sealant 2) to the outer peripheral surfaces (positions corresponding to the sealing portions) of the two PE-coated electric wires 4, The connector terminal 3 connected to the electric wire 4 is attached to the housing 2 through the insertion port 21.

Then, after that, the integrated light amount 6000 mJ /
The sample was obtained by curing the liquid rubber 1b with ultraviolet rays of cm ² .

(Embodiment 6) In Embodiment 5, after the connector terminal 3 is attached to the housing 2, the liquid rubber 1b
In this example, after the liquid rubber 1b was cured, the connector terminal 3 was attached to the housing 2 to obtain a sample. The other points are the same as in the fifth embodiment.

(Example 7) In this example, the sealant used was the above-mentioned sealant 2, which was cured into a sheet shape in advance and cut into an appropriate size.

The sealing method was performed based on the sealing method of the third embodiment.

More specifically, as shown in FIG. 4, a sheet-like rubber-like elastic body 1c cut on the outer peripheral surfaces (positions corresponding to sealing portions) of two PE-coated electric wires 4 is provided.
And the connector terminal 3 connected to the electric wire 4 is
The sample was attached to the housing 2 through the insertion port 21 to obtain a sample.

Example 8 A sample was obtained in the same manner as in Example 1 except that the sealing agent 6 was used as the sealing agent.

Example 9 The same procedure as in Example 1 was carried out except that the sealing agent 7 was used as a sealing agent and the sealing agent was cured by leaving it at room temperature for 2 days. To obtain a sample.

Example 10 The same procedure as in Example 1 was carried out except that the sealant 8 was used as a sealant, and the sealant was cured by leaving it to stand at 100 ° C. for 30 minutes. A sample was obtained in the same manner as described above.

Comparative Example 1 A sample was obtained in the same manner as in Example 1 except that the sealing agent 4 was used as the sealing agent.

Comparative Example 2 A sample was obtained in the same manner as in Example 1 except that the sealing agent 5 was used as the sealing agent.

Comparative Example 3 The same procedure as in Example 1 was carried out except that the sealing agent 6 was used as the sealing agent and the PE-coated electric wire was used as the electric wire.
A sample was obtained in the same manner as described above.

As is clear from FIG. 6, the sealing performance was not sufficient in the comparative example, whereas the sealing performance was excellent in each embodiment, and the sealing performance was stable even when the electric wire was twisted. It was confirmed that the performance was maintained.

[0097]

As described above, according to the method of sealing between the connector terminal insertion opening and the electric wire of the present invention, even in a variety of shapes and in a portion with a small space,
High-performance sealing can be easily performed.

Further, it is possible to perform sealing with a small amount of a sealing material (sealant) to be used, and it is easy to cope with a reduction in the weight of the connector and an increase in the number of electrodes.

Further, according to the waterproof connector of the present invention, the sealing performance is high, and stable sealing performance is exhibited even when the electric wire is twisted.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a waterproof connector according to an embodiment of the present invention.

FIG. 2 is a process diagram showing a process of a sealing method between a connector terminal insertion opening and an electric wire according to the first embodiment of the present invention.

FIG. 3 is a process diagram showing a process of a sealing method between a connector terminal insertion opening and an electric wire according to a second embodiment of the present invention.

FIG. 4 is a process diagram showing a process of a sealing method between a connector terminal insertion opening and an electric wire according to a third embodiment of the present invention.

FIG. 5 is a table showing characteristics of materials used for evaluation.

FIG. 6 is a table showing evaluation results of various evaluations.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber-like elastic body 1a, 1b Liquid rubber 1c Rubber-like elastic body 2 Housing 21 Insertion opening 3 Connector terminal 4 Electric wire 10 Waterproof connector 20 Dispenser

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Jun Okabe 831-2 Kamiaida, Isohara-cho, Kitaibaraki-shi, Ibaraki F-term in the Chemtech Division, Mektron Co., Ltd. 5E051 BA01 5E087 KK03 LL03 LL12 LL16 RR12

Claims (5)

[Claims] A gap between an electric wire connected to a connector terminal and a connector terminal insertion port provided in a housing is provided.
Storage elastic modulus is 10 ⁴ to 10 ⁷ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, peel strength for the coating material of the housing material and the wire are sealed with rubber-like elastic material is 0.05 N / cm or more, a method of sealing between the connector terminal insertion openings and wire After attaching the connector terminal to the housing via the connector terminal insertion port, a liquid as a material of the rubber-like elastic body is provided in a gap between the electric wire connected to the connector terminal and the connector terminal insertion port. A method for sealing between a connector terminal insertion opening and an electric wire, comprising: a step of filling a rubber; and a step of curing the filled liquid rubber to form the rubber-like elastic body. 2. A gap between an electric wire connected to a connector terminal and a connector terminal insertion port provided in a housing,
Storage elastic modulus is 10 ⁴ to 10 ⁷ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, peel strength for the coating material of the housing material and the wire are sealed with rubber-like elastic material is 0.05 N / cm or more, a method of sealing between the connector terminal insertion openings and wire Applying a liquid rubber, which is a material of the rubber-like elastic body, to an outer peripheral surface of an electric wire connected to the connector terminal; and, after attaching the connector terminal to a housing, curing the applied liquid rubber. Forming the rubber-like elastic body, and a method of sealing between the connector terminal insertion opening and the electric wire. 3. A gap between an electric wire connected to a connector terminal and a connector terminal insertion port provided in a housing,
Storage elastic modulus is 10 ⁴ to 10 ⁷ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, peel strength for the coating material of the housing material and the wire are sealed with rubber-like elastic material is 0.05 N / cm or more, a method of sealing between the connector terminal insertion openings and wire A step of applying a liquid rubber serving as a material of the rubber-like elastic body to an outer peripheral surface of an electric wire connected to the connector terminal; and a step of curing the applied liquid rubber to form the rubber-like elastic body. Attaching the connector terminal to the housing via the connector terminal insertion port. A method for sealing between the connector terminal insertion port and the electric wire. 4. A gap between an electric wire connected to a connector terminal and a connector terminal insertion port provided in a housing,
Storage elastic modulus is 10 ⁴ to 10 ⁵ Pa, loss elastic modulus is 10 ³ P
a~10 ⁶ Pa, peel strength for the coating material of the housing material and the wire are sealed with rubber-like elastic material is 0.05 N / cm or more, a method of sealing between the connector terminal insertion openings and wire Winding a tape or sheet-like rubber-like elastic body around the outer peripheral surface of the electric wire connected to the connector terminal; and, after winding the rubber-like elastic body, connect the connector terminal through the connector terminal insertion opening. A method of sealing between a connector terminal insertion opening and an electric wire, comprising: a step of attaching to a housing. 5. A housing provided with a connector terminal insertion port, a connector terminal attached to the housing via the connector terminal insertion port, an electric wire connected to the connector terminal, and the connector terminal insertion port. In a waterproof connector provided with a rubber-like elastic body that seals a gap between the rubber-like elastic body, the rubber-like elastic body has a storage elastic modulus of 10 ⁴ to 10 ⁷ Pa,
A waterproof connector characterized by having a loss elastic modulus of 10 ³ Pa to 10 ⁶ Pa and a peel force of 0.05 N / cm or more against a housing material and a coating material of an electric wire.