Sealing structure of flexible cable connector for high vacuum environment

Abstract

The utility model discloses a sealing structure of a flexible cable connector for a high vacuum environment, which belongs to the technical field of cable connectors and comprises a sealing cover, a flexible connector, a rubber sealing ring and a sealing box, connector plugs are arranged at two ends of the flexible connector, and a flexible flat cable is arranged in the middle of the flexible connector; according to the utility model, the head part of the flexible connector can be sealed without designing a complicated sealing structure, when the flexible flat cable has a single layer, a good sealing effect is ensured through the reasonable design of the sealing cover and the sealing box and the coating of the sealing glue layer, and when the flexible flat cable has multiple layers, the sealing effect is ensured. According to the multi-layer FFC, the sealing glue layer is coated between single layers, and the cutting tool is designed and manufactured for pressing, so that the problem that the internal airtightness of the multi-layer FFC is invalid is effectively solved, the sealing reliability is guaranteed from multiple layers, and the long-term stable operation in a high-vacuum environment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable connector technical field, concretely relates to a sealing structure of flexible cable connector for high vacuum environment. BACKGROUND

[0002] In many fields of modern science and technology, high vacuum environment plays a key role, for example, in the semiconductor manufacturing process, the photolithography, etching and other processes of chips need to be carried out in high vacuum environment to ensure that impurities do not interfere with the precision machining of the microscopic level, and ensure the performance and yield of chips, in the field of aerospace, some components of satellites and spacecraft run in the high vacuum space environment, and the internal electronic equipment connection needs highly reliable cable connectors, in addition, particle accelerators and other equipment in high energy physics experiments also rely on high vacuum environment to realize accurate particle acceleration and detection, and a large number of electrical connections need to be kept stable in such harsh environment, with the continuous development of these industries, the demand for equipment and components suitable for high vacuum environment continues to grow.

[0003] The high vacuum sealing of the existing flexible connector is generally achieved by sealing the connector head of the flexible connector from the high vacuum environment outside, and there are many mature schemes for the sealing form of the connector head and the side plate, which generally uses a sealing ring scheme, which requires tightening multiple screws around the connector head one by one, and the installation is not convenient, and the size limitation of the fastening screws causes the side plate to be unable to access the connector, which is generally thin, and there is a large limitation in volume, the connector head assembly has many metal contacts, which accordingly increases the possibility of sealing failure of the head itself, the above sealing mode needs to increase the corresponding locking installation structure on the flexible cable connector head, and cannot consider the sealing of the flat plug connector, therefore, a sealing structure of flexible cable connector for high vacuum environment is needed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a sealing structure of flexible cable connector for high vacuum environment to solve the problems raised in the background.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a kind of sealing structure of flexible cable connector for high vacuum environment, including sealing cover, flexible connector, rubber seal ring and sealing box, the both ends of the flexible connector are connector plug, flexible flat cable is equipped in the flexible connector, after sealing cover and sealing box are locked by screw, the gap with the thickness of flexible flat cable of flexible connector is generated inside, sealing environment is equipped between the sealing cover and sealing box, the inside of flexible flat cable is equipped with single-layer flexible flat cable, and sealing adhesive layer is coated between multiple single-layer flexible flat cables.

[0006] As a preferred embodiment, the flexible flat cable passes through the gap between the sealing cover and the sealing box, the plug end of the flexible connector is placed in the sealing environment, the end of the flexible connector placed in the sealing environment is provided with a circuit board, and a fixing bolt is provided between the sealing cover and the sealing box.

[0007] As a preferred embodiment, if the flexible flat cable is a multi-layer structure, the sealing cover and one of the single-layer flexible flat cables of the flexible flat cable are compressed by coating the sealing adhesive layer, and the rubber seal ring directly contacts the flexible flat cable to realize sealing.

[0008] As a preferred embodiment, the sealing cover and the sealing box are made of metal material, the surface roughness is not less than 0.8, the thickness of the single-layer flexible flat cable is preferably not greater than 0.2 mm, and the thickness of the plug at both ends of the flexible connector is generally not less than the overall thickness of the flexible flat cable.

[0009] As a preferred embodiment, the sealing cover includes a first flange plate, the first flange plate is provided with a boss, the sealing cover is provided with a first groove at a position corresponding to the flexible flat cable, the sealing box includes a second flange plate, and a second groove is formed in the sealing box.

[0010] As a preferred embodiment, the boss top corner size is the same as the thickness of the flexible flat cable, the boss and the first groove bottom corner size are not greater than the thickness of the flexible flat cable, the second groove top and bottom corner size on the sealing box are the same as the thickness of the flexible flat cable, and the flexible flat cable and the sealing box, the sealing cover gap both sides are slightly rounded and supplemented with a sealing adhesive layer.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses, through the combination of sealing cover, rubber seal ring, sealing box and high vacuum sealing glue to the flexible flat cable is sealed, can make the flexible connector head not need to design complicated sealing structure, can complete sealing, when the flexible flat cable is single layer, through the reasonable design of sealing cover and sealing box and the coating of sealing glue layer, has guaranteed good sealing effect, if the flexible flat cable is multilayer, adopts the coating sealing glue layer between single layer, and designs and makes the mode of intercepting tooling and pressing, effectively solved the problem of the airtightness failure of multilayer FFC, has guaranteed the reliability of sealing from multiple aspects, ensures long-term stable operation under high vacuum environment.

[0013] The utility model discloses, on the design of sealing structure, adopted rubber seal ring and flexible flat cable direct contact seal, and combine the boss and recess design of sealing cover, sealing box and the coating of multiple sealing glue layer, formed the multiple ways of preventing sealing failure mode, even under the extreme condition of high vacuum environment, can also effectively maintain sealing performance, reduce the system failure risk caused by single sealing mode failure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the schematic diagram of the width center section solid structure of the sealing structure of the utility model,

[0015] Figure 2 It is the schematic diagram of the width center section solid structure of the flexible flat cable of the utility model,

[0016] Figure 3 It is the schematic diagram of the solid structure of the sealing box of the utility model,

[0017] Figure 4 It is the schematic diagram of the solid structure of the sealing cover of the utility model,

[0018] Figure 5 It is the schematic diagram of the enlarged solid structure of the utility model Figure 2 A,

[0019] In the drawing: 1, sealing cover, 2, flexible connector, 3, rubber seal ring, 4, sealing box, 5, flexible flat cable, 6, single layer flexible flat cable, 7, sealing glue layer, 8, fixed bolt, 9, sealing environment, 10, circuit board, 101, boss, 102, first recess, 103, first flange plate, 401, second recess, 402, second flange plate. DETAILED DESCRIPTION

[0020] The utility model will be further described below in conjunction with the embodiment.

[0021] The following examples are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the present application under the concept of the present application all belong to the protection scope of the present application.

[0022] Please refer to Figures 1-5 The utility model provides a kind of sealing structure for flexible cable connector in high vacuum environment, including sealing cover 1, flexible connector 2, rubber sealing ring 3 and sealing box 4, the both ends of flexible connector 2 are connector plug, flexible connector 2 middle is equipped with flexible flat cable 5, sealing cover 1 and sealing box 4 are locked by screw, and the gap with the thickness of flexible flat cable 5 of flexible connector 2 is generated inside, sealing cover 1 and sealing box 4 between being equipped with sealed environment 9, flexible flat cable 5 is equipped with single-layer flexible flat cable 6 inside, and multiple single-layer flexible flat cable 6 is coated with sealing adhesive layer 7.

[0023] Flexible flat cable 5 passes through the gap between sealing cover 1 and sealing box 4, and the plug end of flexible connector 2 is placed in sealed environment 9, and the end of flexible connector 2 placed in sealed environment 9 is provided with circuit board 10, sealing cover 1 and sealing box 4 between being equipped with fixed bolt 8, and the other end of flexible connector 2 is placed in external environment.

[0024] Flexible flat cable 5 is multilayer structure, sealing cover 1 and one single-layer flexible flat cable 6 of flexible flat cable 5 are coated with sealing adhesive layer 7 and pressed tightly, rubber sealing ring 3 is directly contacted with flexible flat cable 5 to realize sealing, and the sealing adhesive layer 7 coated between multiple single-layer flexible flat cable 6 is designed and manufactured by intercepting tooling by intercepting sealing structure pressed part, and the sealing adhesive layer 7 of single-layer flexible flat cable 6 is pressed tightly by intercepting tooling.

[0025] Sealing cover 1 and sealing box 4 adopt metal material, and the surface roughness is not less than 0.8, preferably AL2A402-T4, the thickness of single-layer flexible flat cable 6 is preferably not more than 0.2mm, the thickness of plug at both ends of flexible connector 2 is generally not less than the overall thickness of flexible flat cable 5, and the sealing adhesive layer 7 is preferably Agilent Torr Seal.

[0026] Sealing cover 1 includes first flange plate 103, and the first flange plate 103 is provided with boss 101, and the sealing cover 1 is provided with first groove 102 at the position corresponding to flexible flat cable 5, and the sealing box 4 includes second flange plate 402, and the sealing box 4 is provided with second groove 401.

[0027] The top corner size of the boss 101 is same as the thickness of the flexible flat cable 5, the bottom corner size of the boss 101 and the first groove 102 is not greater than the thickness of the flexible flat cable 5, the top corner and the bottom corner size of the second groove 401 on the sealing box 4 are same as the thickness of the flexible flat cable 5, the flexible flat cable 5 and the two sides of the gap of the sealing box 4 and the sealing cover 1 are coated with the sealing glue layer 7 with a slight round corner, the compression ratio of the high-vacuum environment rubber sealing ring 3 is 25%, and the rubber sealing ring 3 preferably contains fluoropolymer.

[0028] The working principle and use process of the utility model are as follows: firstly, corresponding operation is carried out according to the layer number of the flexible flat cable 5, if it is single-layer flexible flat cable 6, the flexible flat cable 6 is passed through the equal-width gap formed after the screw locking of the sealing cover 1 and the sealing box 4, the flexible connector 2 plug is arranged in the sealing environment 9 and the external environment respectively, the sealing glue layer 7 is coated at the slight round corner of the contact part of the flexible flat cable 5 and the sealing cover 1 and the sealing box 4 and the gap, the rubber sealing ring 3 is directly contacted with the flexible flat cable 5 to realize sealing, if it is multi-layer flexible flat cable 5, the sealing glue layer 7 is coated between single layers and is pressed by the cutting tool, meanwhile, the sealing cover 1 and one single-layer flexible flat cable 6 are coated with the glue layer and are pressed, the remaining operation is similar to that of single layer, the special structure of the sealing cover 1 and the sealing box 4 and the sealing glue layer 7 guarantee the sealing between the layers of the flexible flat cable 5 and the external environment, the rubber sealing ring 3 enhances the sealing effect, so that the electrical connection requirement between the inside and the outside of the equipment in the high-vacuum environment is met and gas leakage is prevented.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a flexible cable connector in a high vacuum environment, comprising a sealing cap (1), a flexible connector (2), a rubber sealing ring (3) and a sealing box (4), characterized in that: The flexible connector (2) is provided with a flexible flat cable (5) in the middle, and a gap with a width equal to the thickness of the flexible flat cable (5) of the flexible connector (2) is formed in the interior after the sealing cover (1) and the sealing box (4) are locked by screws, and a sealed environment (9) is arranged between the sealing cover (1) and the sealing box (4), and the flexible flat cable (5) is internally provided with single-layer flexible flat cables (6), and the single-layer flexible flat cables (6) are coated with a sealing glue layer (7).

2. A seal for a flexible cable connector for use in a high vacuum environment according to claim 1, wherein: The flexible flat cable (5) passes through the gap between the sealing cover (1) and the sealing box (4), one end of the plug of the flexible connector (2) is arranged in the sealed environment (9), one end of the flexible connector (2) arranged in the sealed environment (9) is provided with a circuit board (10), and a fixing bolt (8) is arranged between the sealing cover (1) and the sealing box (4).

3. A seal for a flexible cable connector for use in a high vacuum environment as defined in claim 1, wherein: If the flexible flat cable (5) is a multi-layer structure, the sealing cover (1) and one single-layer flexible flat cable (6) of the flexible flat cable (5) are pressed by coating the sealing glue layer (7), and the rubber sealing ring (3) is in direct contact with the flexible flat cable (5) to realize sealing.

4. The seal for a flexible cable connector for a high vacuum environment of claim 1, wherein: The sealing cover (1) and the sealing box (4) are made of metal materials, and the surface roughness is not less than 0.8, the thickness of the single-layer flexible flat cable (6) is preferably not greater than 0.2mm, and the thickness of the plug at both ends of the flexible connector (2) is generally not less than the overall thickness of the flexible flat cable (5).

5. The seal for a flexible cable connector for a high vacuum environment of claim 1, wherein: The sealing cover (1) comprises a first flange plate (103), the first flange plate (103) is provided with a boss (101), the sealing cover (1) is provided with a first groove (102) at a position corresponding to the flexible flat cable (5), the sealing box (4) comprises a second flange plate (402), and the sealing box (4) is provided with a second groove (401).

6. A seal for a flexible cable connector for use in a high vacuum environment according to claim 5, wherein: The boss (101) is provided with a top end round corner with a size same as the thickness of the flexible flat cable (5), the boss (101) and the first groove (102) are provided with a bottom end round corner with a size not greater than the thickness of the flexible flat cable (5), the second groove (401) of the sealing box (4) is provided with a top end round corner and a bottom end round corner with sizes same as the thickness of the flexible flat cable (5), and the flexible flat cable (5) is coated with the sealing glue layer (7) on both sides of the gap of the sealing box (4) and the sealing cover (1).

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