CN214124670U

CN214124670U - Wire harness and waterproof and breathable device for wire harness pipe thereof

Info

Publication number: CN214124670U
Application number: CN202022663843.3U
Authority: CN
Inventors: 邓晓红; 龙俊
Original assignee: Changsha Jinghua Electronic Technology Co ltd
Current assignee: Changsha Jinghua Electronic Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-09-03
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a pencil and effective waterproof ventilative device of pencil thereof. The waterproof and breathable device for the wire harness pipe comprises a fixing seat and a one-way permeable membrane. The fixing seat is a hollow structure with a first opening and a second opening. The one-way permeable membrane is arranged in the fixed seat to separate the first opening from the second opening. The water permeating direction of the one-way water permeable membrane is consistent with the direction of the first opening pointing to the second opening. Therefore, above-mentioned waterproof ventilation unit's for pencil setting can guarantee the intraductal air drying of pencil to reduce the intraductal transmission line of pencil and take place the risk of incident such as short circuit, electric leakage, still reduced the intraductal transmission line of pencil and taken place the probability of damaging simultaneously, not only make the pencil have higher safety in utilization, but also prolonged the life of pencil.

Description

Wire harness and waterproof and breathable device for wire harness pipe thereof

Technical Field

The utility model relates to an electronic product technical field especially relates to a pencil and pencil is waterproof ventilative device for pipe.

Background

In the electronic field, each electronic component is generally connected through a wire, an optical cable, and a cable, and in order to ensure the arrangement of the wire, the optical cable, and the cable to be orderly, a plurality of wires, a plurality of optical cables, and a plurality of cables are usually inserted into a wire harness tube to form a wire harness. However, after the wire harness is used for a long time, the inside of the wire harness pipe may have a problem of a lot of moisture due to local water seepage of the wire harness pipe, and the existence of the moisture may greatly affect the service life and the use safety of the wires, the optical cables and the cables.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a wire harness and a waterproof and air-permeable device for a wire harness tube, which can improve the safety of use of the wire harness and prolong the life of the wire harness, in order to solve the problem that the life and safety of the wires, optical cables, and cables in the wire harness tube are affected by the presence of moisture.

A waterproof and breathable device for a wire harness tube comprises a fixed seat and a one-way permeable membrane;

the fixed seat is a hollow structure with a first opening and a second opening;

the one-way water permeable membrane is arranged in the fixed seat so as to separate the first opening from the second opening; the water permeating direction of the one-way water permeable membrane is consistent with the direction of the first opening pointing to the second opening.

In some embodiments, the device further comprises a first mounting sleeve and a second mounting sleeve;

the first mounting sleeve is mounted in the fixed seat; the first mounting sleeve comprises a first bottom plate and a first side plate arranged along the circumferential direction of the first bottom plate; the first bottom plate and the first side plate are arranged in an enclosing manner to form an accommodating cavity; the first bottom plate is provided with a first through hole communicated with the accommodating cavity;

the second mounting sleeve is mounted in the accommodating cavity; the second mounting sleeve comprises a second side plate; the second side plate is surrounded to form a hollow cylindrical structure with two open ends;

the one-way permeable membrane is clamped between the inner wall of the first bottom plate and the end part of one end of the hollow cylindrical structure and covers the first through hole.

In some embodiments, at least one of the fixing seat and the first mounting sleeve is an elastic structure; a clamping convex edge is arranged on any one of the inner wall of the fixed seat and the outer wall of the first side plate; the other one of the inner wall of the fixed seat and the outer wall of the first side plate is provided with a clamping groove; the clamping convex rib is clamped in the clamping groove so as to install the first installation sleeve in the fixed seat.

In some embodiments, the retaining protrusion and the retaining groove extend along the circumferential direction of the fixing base.

In some of these embodiments, at least one of the first and second mounting sleeves is a resilient structure; a clamping convex block is arranged on any one of the inner wall of the first side plate and the outer wall of the second side plate; the other one of the inner wall of the first side plate and the outer wall of the second side plate is provided with a clamping through hole; the clamping lug is clamped in the clamping through hole so as to install the second installation sleeve in the first installation sleeve.

In some embodiments, the first side plate is provided with the clamping through hole; the clamping lug is arranged at one end of the second side plate, which is far away from the one-way permeable membrane.

In some of these embodiments, the retention bumps are wedge-shaped blocks; the surface of one side of the clamping lug facing the one-way permeable membrane is an inclined surface.

In some embodiments, the inner wall of the first side plate is far away from the edge of the first side plate, and a guide groove communicated with the clamping through hole is formed in the inner wall of the first side plate; in the circumferential direction of the fixed seat, the size of the guide groove is larger than or equal to that of the clamping through hole.

In some of these embodiments, the second mounting sleeve further comprises a second base plate; the second bottom plate is a hollow plate; the second bottom plate is arranged in the hollow cylindrical structure and is connected with the inner wall of the second side plate; the outer wall of the second bottom plate is abutted against the one-way water permeable membrane.

In some of these embodiments, the outer surface of the second bottom plate is flush with the surface of the second side plate facing the end of the water permeable unidirectional membrane.

In some of these embodiments, further comprising an elastomeric seal in the shape of a ring; the elastic sealing element is arranged at the joint of the one-way permeable membrane and the inner wall of the fixed seat in a sealing way.

A wire harness is characterized by comprising a wire harness pipe, a plurality of transmission lines and a waterproof and breathable device for the wire harness pipe;

the transmission lines penetrate through the wire harness pipe; the side wall of the wire harness pipe is provided with an air hole;

the end, provided with the first opening, of the fixing seat is fixed on the wire harness tube and communicated with the air hole.

In the wire harness and the waterproof and breathable device for the wire harness tube, a plurality of transmission lines (such as wires, cables, optical cables and the like) are arranged in the wire harness tube in a penetrating manner, and the waterproof and breathable device for the wire harness tube is arranged on the tube wall of the wire harness tube to form the wire harness. When the wire harness is used, even if moisture enters the wire harness pipe, the one-way water permeable film has the one-way water permeable function, so that the moisture in the wire harness pipe can be discharged out of the wire harness pipe through the one-way water permeable film under the driving of flowing air when air inside and outside the wire harness pipe is circulated through the air holes; since the permeable direction of the water permeable membrane is the same as the direction of the first opening toward the second opening, the external moisture cannot penetrate through the water permeable membrane 120 into the bundle pipe. Therefore, above-mentioned waterproof ventilation unit's for pencil setting can guarantee the intraductal air drying of pencil to reduce the intraductal transmission line of pencil and take place the risk of incident such as short circuit, electric leakage, still reduced the intraductal transmission line of pencil and taken place the probability of damaging simultaneously, not only make the pencil have higher safety in utilization, but also prolonged the life of pencil.

Drawings

Fig. 1 is a schematic structural view of a waterproof and breathable device for a wire harness tube according to a preferred embodiment of the present invention;

fig. 2 is an exploded view of the waterproof and breathable device for a wire harness pipe shown in fig. 1;

fig. 3 is a sectional view of a fixing base in the waterproof and air-permeable device for a wire harness pipe shown in fig. 1;

fig. 4 is a sectional view of the waterproof and breathable device for a wire harness pipe shown in fig. 1;

fig. 5 is a schematic structural view of a first mounting sleeve in the waterproof and breathable device for a wire harness pipe shown in fig. 1;

FIG. 6 is a cross-sectional view of the first mounting sleeve of FIG. 5;

fig. 7 is a schematic structural view of a second mounting sleeve in the waterproof and breathable device for a wire harness pipe shown in fig. 1;

fig. 8 is a cross-sectional view of the second mounting sleeve of fig. 7.

Description of reference numerals: 100. the wire harness pipe is provided with a waterproof ventilating device; 110. a fixed seat; 111. a first opening; 112. A second opening; 113. clamping the groove; 120. a one-way water permeable membrane; 130. a first mounting sleeve; 131. a first base plate; 1311. a first via hole; 1312. an annular groove; 132. a first side plate; 133. an accommodating cavity; 134. Clamping the through hole; 135. a guide groove; 136. clamping the convex ribs; 140. a second mounting sleeve; 141. a second side plate; 142. clamping the bump; 143. a second base plate; 150. an elastomeric seal.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present, unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

As described in the background art, moisture inevitably enters the wire harness tube during the use of the wire harness, and the moisture may cause safety risks such as short circuit and electric leakage of the transmission line in the wire harness tube, and may affect the service life of the transmission line. Of course, the greater the moisture content in the wire harness pipe, the greater the probability of causing a safety risk to the transmission line, and the greater the probability of causing damage to the transmission line. Therefore, the applicant proposes the invention idea of installing the waterproof and breathable device for the wire harness pipe on the wire harness pipe to improve the use safety of the transmission line in the wire harness pipe and prolong the service life of the transmission line in the wire harness pipe.

Referring to fig. 1, a wire harness (not shown) of the present invention includes a wire harness tube (not shown), a plurality of transmission lines (not shown), and a waterproof and air-permeable device for the wire harness tube.

A plurality of transmission lines are arranged in the wire harness tube in a penetrating mode. The transmission line can be a wire, a cable, an optical cable, etc. Generally, the wire harness tube is made of materials with good insulating performance, such as rubber, plastics and the like, so that the use safety of the wire harness is improved, and the wire harness tube has insulating and protecting functions. The tube wall of the wire harness tube is provided with air holes (not shown). The waterproof and air-permeable device 100 for a wire harness pipe is installed at the edge of the air-permeable hole. The waterproof and breathable device 100 for a wire harness tube is mainly used for realizing air circulation inside and outside the wire harness tube and discharging moisture in the wire harness tube so as to ensure air dryness in the wire harness tube.

Specifically, a plurality of air holes are formed in the tube wall of the wire harness tube at intervals in the length direction of the wire harness. The wire harness pipe is provided with a plurality of waterproof ventilating devices 100 which are respectively corresponding to the plurality of ventilating holes. The number of the vent holes and the number of the waterproof and breathable devices 100 for a wire harness pipe may be set according to the length of the wire harness and the usage environment of the wire harness.

Referring to fig. 1 and 2, a waterproof and air-permeable device 100 for a wire harness pipe according to a preferred embodiment of the present invention includes a fixing base 110 and a one-way permeable membrane 120.

Referring to fig. 3, the fixing base 110 is a hollow structure having a first opening 111 and a second opening 112. The fixing base 110 mainly plays a role of supporting and connecting. In the wire harness, one end of the fixing seat 110 having the first opening 111 is fixed to the harness pipe and is communicated with the vent hole to mount the waterproof and venting device 100 for the harness pipe on the harness pipe. Specifically, the air holes are aligned with the first opening 111 and the second opening 112, respectively.

The fixing base 110 and the wire harness tube may be hermetically connected by bonding, welding, or the like, or may be integrally formed. Specifically, in the present embodiment, the fixing base 110 and the wire harness pipe are integrally formed.

Referring to fig. 4, the one-way permeable membrane 120 is installed in the fixing base 110 to separate the first opening 111 and the second opening 112. The water permeable direction of the water permeable unidirectional film 120 coincides with the direction in which the first opening 111 is directed toward the second opening 112. The one-way permeable film 120 has functions of air permeability and one-way water permeability, so the one-way permeable film 120 may be a composite film having a one-way water permeability function, a cloth having a one-way water permeability function, or the like, or other one-way water permeability structures having air permeability and one-way water permeability functions.

In the using process of the wire harness, even if moisture (such as water vapor, rainwater and the like) enters the wire harness pipe, the one-way permeable film 120 has the functions of air permeability and one-way water permeability, so that the wire harness pipe realizes the circulation of inside and outside air through the one-way permeable film 120. In the air circulation process, the moisture in the wire harness pipe is driven by the flowing air to be discharged out of the wire harness pipe through the one-way water permeable film 120; since the permeable direction of the water permeable unidirectional membrane 120 coincides with the direction in which the first opening 111 is directed to the second opening 112, external moisture cannot penetrate through the water permeable unidirectional membrane 120 into the bundle pipe. Therefore, the air drying in the wire harness pipe can be ensured by the arrangement of the one-way permeable membrane 120, so that the risk of safety accidents of the transmission line in the wire harness pipe is reduced, the probability of damage of the transmission line in the wire harness pipe is reduced, and the wire harness has higher use safety and longer service life.

Referring to fig. 5 and 6, in some embodiments, the waterproof and air-permeable device 100 for a wire harness further includes a first mounting sleeve 130 and a second mounting sleeve 140. The first mounting sleeve 130 is mounted in the fixing base 110. The first mounting sleeve 130 includes a first bottom plate 131 and a first side plate 132 disposed along a circumferential direction of the first bottom plate 131. The first bottom plate 131 and the first side plate 132 enclose to form a receiving cavity 133. The first bottom plate 131 is opened with a first via 1311 communicating with the receiving cavity 133. The first mounting sleeve 130 may be a splicing structure formed by connecting the first bottom plate 131 and the first side plate 132 by welding or the like, or may be an integrally formed structure.

Referring to fig. 4, 7 and 8, the second mounting sleeve 140 is received and mounted in the receiving cavity 133. The second mounting sleeve 140 includes a second side plate 141. The second side plate 141 surrounds a hollow cylindrical structure formed with both ends open. The water-permeable one-way membrane 120 is clamped between the inner wall of the first base plate 131 and the end of one end of the hollow cylindrical structure and covers the first via hole 1311.

In the process of processing the waterproof and breathable device 100 for a bundle tube, the one-way permeable membrane 120 is only required to be accommodated in the accommodating cavity 133 and clamped between the inner wall of the first bottom plate 131 and the end part of one end of the hollow cylindrical structure; then, the structure formed by the first mounting sleeve 130, the second mounting sleeve 140 and the water-permeable unidirectional membrane 120 is accommodated in the fixing base 110, and the first mounting sleeve 130 is connected to the inner wall of the fixing base 110, so as to mount the water-permeable unidirectional membrane 120 in the fixing base 110. Therefore, the first and second mounting

sleeves

130 and 140 are provided to simplify the mounting of the water permeable membrane 120 in the holder 110.

Specifically, the first bottom plate 131 is a hollow plate having a first via 1311. The first bottom plate 131 is a hollow plate to ensure the clamping effect of the permeable membrane 120 between the first mounting sleeve 130 and the second mounting sleeve 140, and increase the permeable area of the permeable membrane 120, so as to improve the air permeability and drainage effect of the waterproof and air-permeable device 100 for a wire harness pipe.

Referring to fig. 3 to 6 again, in some embodiments, at least one of the fixing base 110 and the first mounting sleeve 130 is an elastic structure. Either one of the inner wall of the fixed base 110 and the outer wall of the first side plate 132 is provided with a retaining rib 136. The other of the inner wall of the fixed base 110 and the outer wall of the first side plate 132 is provided with a clamping groove 113. The retaining protrusion 136 is engaged with the retaining groove 113 to mount the first mounting sleeve 130 in the fixing base 110. The holding protrusion 136 and the holding groove 113 may be one or a plurality of holding protrusions and holding grooves corresponding to each other.

When the first mounting sleeve 130 needs to be mounted in the fixing base 110, the first mounting sleeve 130 only needs to be accommodated in the fixing base 110, and the retaining protrusion 136 is engaged with the retaining groove 113. Moreover, in the process that the retaining protrusion 136 is clamped into the retaining groove 113, since at least one of the fixing base 110 and the first mounting sleeve 130 is an elastic structure, the elastic structure is elastically deformed under the extrusion of the retaining protrusion 136, so as to facilitate the clamping operation of the retaining protrusion 136 into the retaining groove 113. Therefore, the arrangement of the retaining protrusion 136 and the retaining groove 113 makes the installation of the first mounting sleeve 130 in the fixing base 110 easier.

Further, in some embodiments, the retaining rib 136 and the retaining groove 113 extend along the circumferential direction of the fixing base 110. The retaining protrusion 136 may be an arc structure extending along the circumferential direction of the fixing base 110, or an annular structure disposed along the circumferential direction of the fixing base 110. The retaining protrusion 136 and the retaining groove 113 are configured to extend along the circumferential direction of the fixing base 110, so that the connection between the first mounting sleeve 130 and the fixing base 110 is more stable.

Referring to fig. 4 to 8 again, in some embodiments, at least one of the first and second mounting

sleeves

130 and 140 is a resilient structure. A locking protrusion 142 is disposed on either one of the inner wall of the first side plate 132 and the outer wall of the second side plate 141. The other of the inner wall of the first side plate 132 and the outer wall of the second side plate 141 is provided with a clamping through hole 134. The locking protrusion 142 is locked in the locking through hole 134 to mount the second mounting sleeve 140 in the first mounting sleeve 130.

When the second mounting sleeve 140 needs to be mounted in the first mounting sleeve 130, in the process of pushing the second mounting sleeve 140 into the first mounting sleeve 130, the elastic structures in the first mounting sleeve 130 and the second mounting sleeve 140 are elastically deformed under the extrusion of the clamping protrusion 142 until the clamping protrusion 142 is clamped into the clamping through hole 134, i.e., the first mounting sleeve 130 and the second mounting sleeve 140 are mounted. Therefore, the arrangement of the catching projections 142 and the catching through holes 134 makes the installation of the second mounting sleeve 140 into the first mounting sleeve 130 easier, and also simplifies the installation of the water permeable unidirectional film 120.

Specifically, the plurality of retaining protrusions 142 and the plurality of retaining through holes 134 are all one-to-one corresponding. Specifically, the plurality of retaining protrusions 142 and the plurality of retaining through holes 134 are disposed at intervals along the circumferential direction of the fixing base 110. Each clamping lug 142 is clamped in the corresponding clamping through hole 134, so that multipoint connection is realized between the first mounting sleeve 130 and the second mounting sleeve 140, the connection stability between the first mounting sleeve 130 and the second mounting sleeve 140 is improved, and the fixing effect of the one-way permeable membrane 120 between the first mounting sleeve 130 and the second mounting sleeve 140 is also improved.

Furthermore, the first side plate 132 is provided with a clamping through hole 134. The retaining protrusion 142 is disposed at an end of the second side plate 141 away from the water-permeable unidirectional film 120. In the process of inserting the second mounting sleeve 140 into the first mounting sleeve 130, the retaining protrusion 142 is pushed into the receiving cavity 133 by an external force, and at this time, the elastic structures in the first mounting sleeve 130 and the second mounting sleeve 140 are elastically deformed; the second mounting sleeve 140 can be mounted in the first mounting sleeve 130 until the latching protrusion 142 is latched into the latching through hole 134. Therefore, the clamping projection 142 is disposed on the outer wall of the second mounting sleeve 140, and the clamping through hole 134 is disposed on the side wall of the first mounting sleeve 130, so that the clamping projection 142 is more easily squeezed into the accommodating cavity 133, and the damage to the clamping projection 142 and the edge of the clamping through hole 134 during the squeezing process can be reduced.

Referring to fig. 7 and 8 again, in some embodiments, the holding protrusion 142 is a wedge-shaped block. The side surface of the catching protrusion 142 facing the water-permeable unidirectional film 120 is an inclined surface. Specifically, the holding through hole 134 is a wedge-shaped hole matched with the holding protrusion 142. In the process of squeezing the retaining protrusion 142 into the receiving cavity 133, the inclined surface of the retaining protrusion 142 contacts with the edge of the inner wall of the first side plate 132, and at this time, the acting force of the first side plate 132 on the retaining protrusion 142 is decomposed into a radial acting force along the fixing base 110 and an axial acting force along the fixing base 110, so that the retaining protrusion 142 is configured as a wedge-shaped block, which makes the squeezing of the retaining protrusion 142 into the receiving cavity 133 more labor-saving, and further makes the retaining protrusion 142 more easily squeeze into the receiving cavity 133.

Specifically, the inner wall of the first side plate 132 is far away from the edge of the first bottom plate 131, and is provided with a guide groove 135 communicated with the clamping through hole 134. The width of the guide groove 135 is greater than or equal to the size of the catching through hole 134 in the circumferential direction of the fixing base 110. Therefore, in the process of installing the second installation sleeve 140 into the first installation sleeve 130, the first installation sleeve 130 or the second installation sleeve 140 is rotated until the clamping protrusion 142 is aligned with the guide groove 135, and then the clamping protrusion 142 is pushed into the aligned guide groove 135 by using an external force until the clamping protrusion 142 is clamped into the clamping through hole 134. Therefore, the guiding groove 135 is provided to simplify the alignment between the catching protrusion 142 and the catching through hole 134, and further simplify the installation of the second mounting sleeve 140 into the first mounting sleeve 130.

Moreover, the guide groove 135 is formed to reduce the wall thickness of the first side plate 132 at the position of the guide groove 135, so that the work of the clamping protrusion 142 towards the clamping through hole 134 is easier.

Further, in some embodiments, the second mounting sleeve 140 further includes a second base plate 143. The second bottom plate 143 is a hollow plate. The second bottom plate 143 is disposed in the hollow cylindrical structure and connected to the inner wall of the second side plate 141. The outer wall of the second bottom plate 143 abuts against the water permeable membrane 120. The second mounting sleeve 140 may be a splicing structure formed by connecting the second bottom plate 143 and the second side plate 141 at that time by welding or the like, or may be an integrally formed structure.

Therefore, the second bottom plate 143 can ensure the air permeable effect and the water permeable one-way effect of the water permeable one-way membrane 120 installed between the first installation sleeve 130 and the second installation sleeve 140, and at the same time, the contact area between the water permeable one-way membrane 120 and the second installation sleeve 140 can be increased, and the fixing effect of the water permeable one-way membrane 120 can be further increased.

Specifically, the outer surface of the second bottom plate 143 is flush with the surface of the second side plate 141 facing the one-way water permeable membrane 120. Therefore, when the water permeable unidirectional membrane 120 is clamped between the inner wall of the first mounting sleeve 130 and the second mounting sleeve 140, the outer wall of the second bottom plate 143 and the end surface of the second side plate 141 facing the first opening 111 are both abutted against the water permeable unidirectional membrane 120, and the fixing effect of the water permeable unidirectional membrane 120 can be further improved.

In some embodiments, the waterproof and breathable device for a wire harness tube 100 further includes an elastic sealing member 150 having a ring shape. The elastic sealing member 150 is installed at the connection between the water permeable membrane 120 and the inner wall of the fixing base 110. Therefore, the elastic sealing member 150 has a sealing function, so that external moisture can be prevented from entering the wire harness pipe through the joint between the one-way permeable membrane 120 and the inner wall of the fixing base 110, and the use safety performance of the wire harness is further improved.

Specifically, the arrangement and installation position of the elastic sealing element 150 include the following conditions:

in embodiment 1, the elastic sealing member 150 is sealingly installed between the water permeable membrane 120 and the inner wall of the first base plate 131. Thus, the elastic sealing member 150 is provided to improve the sealability between the water permeable membrane 120 and the first mounting sleeve 130, thereby further reducing the possibility of external moisture entering the wire harness.

Specifically, the inner wall of the first bottom plate 131 is formed with an annular groove 1312. The resilient seal 150 is captured within the annular groove 1312 and is in sealing contact with the water permeable unidirectional membrane 120. The annular groove 1312 is provided to facilitate the installation of the elastic sealing member 150, and reduce the possibility of the elastic sealing member 150 moving during the use process, thereby further ensuring the sealing effect between the water permeable membrane 120 and the first mounting sleeve 130.

In embodiment 2, the elastic seal 150 includes a first seal ring and a second seal ring. The first sealing ring is hermetically installed between the water permeable membrane 120 and the inner wall of the first base plate 131. The second sealing ring is hermetically installed between the inner wall of the fixing seat 110 and the outer wall of the first side plate 132. From this, the setting of first sealing washer and second sealing washer can realize the sealed between first installation cover 130 and fixing base 110, still realizes simultaneously that first installation cover 130 and one-way permeable membrane 120 are sealed between to make the sealed effect between one-way permeable membrane 120 and the fixing base 110 inner wall better, further improved the safety in utilization of pencil.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A waterproof and breathable device for a wire harness tube is characterized by comprising a fixed seat and a one-way permeable membrane;

the fixed seat is a hollow structure with a first opening and a second opening;

2. The waterproof and breathable device for a wire harness tube according to claim 1, further comprising a first mounting sleeve and a second mounting sleeve;

3. The waterproof and breathable device for a wire harness according to claim 2, wherein at least one of the fixing seat and the first mounting sleeve is of an elastic structure; a clamping convex edge is arranged on any one of the inner wall of the fixed seat and the outer wall of the first side plate; the other one of the inner wall of the fixed seat and the outer wall of the first side plate is provided with a clamping groove; the clamping convex rib is clamped in the clamping groove so as to install the first installation sleeve in the fixed seat.

4. The waterproof and air-permeable device for a wire harness pipe as claimed in claim 3, wherein the retaining rib and the retaining groove extend in a circumferential direction of the fixing base.

5. The waterproof and breathable device for a wire harness according to claim 2, wherein at least one of the first mounting sleeve and the second mounting sleeve is of a resilient structure; a clamping convex block is arranged on any one of the inner wall of the first side plate and the outer wall of the second side plate; the other one of the inner wall of the first side plate and the outer wall of the second side plate is provided with a clamping through hole; the clamping lug is clamped in the clamping through hole so as to install the second installation sleeve in the first installation sleeve.

6. The waterproof and breathable device for a wire harness tube according to claim 5, wherein the first side plate is provided with the retaining through hole; the clamping lug is arranged at one end of the second side plate, which is far away from the one-way permeable membrane.

7. The waterproof and breathable device for a wire harness tube according to claim 6, wherein the retaining projection is a wedge-shaped block; the surface of one side of the clamping lug facing the one-way permeable membrane is an inclined surface.

8. The waterproof and breathable device for the wire harness tube according to claim 6, wherein a guide groove communicating with the retaining through hole is formed in an inner wall of the first side plate away from an edge of the first side plate; in the circumferential direction of the fixed seat, the size of the guide groove is larger than or equal to that of the clamping through hole.

9. The waterproof and breathable device for a wire harness tube according to claim 6, wherein the second mounting sleeve further comprises a second bottom plate; the second bottom plate is a hollow plate; the second bottom plate is arranged in the hollow cylindrical structure and is connected with the inner wall of the second side plate; the outer wall of the second bottom plate is abutted against the one-way water permeable membrane.

10. The waterproof and air-permeable device for a wire harness tube according to claim 9, wherein an outer surface of the second bottom plate is flush with a surface of the second side plate facing one end of the water permeable unidirectional film.

11. The waterproof and breathable device for a wire-harness tube according to claim 1, further comprising an elastic sealing member in a ring shape; the elastic sealing element is arranged at the joint of the one-way permeable membrane and the inner wall of the fixed seat in a sealing way.

12. A wire harness comprising a harness tube, a plurality of transmission lines, and the waterproof and air-permeable device for a harness tube according to any one of claims 1 to 11;