Flexible plate assembly with bent spring and path fixing

Abstract

A kind of flexible plate assembly with bending spring and can realize path fixed, including flexible plate, still including bending spring, bending spring is made of elastic material, flexible plate is bent and set in its corresponding equipment, the bending section of flexible plate is provided with bending spring, the bending angle of bending spring is equal to the bending angle of corresponding flexible plate bending section, bending spring is fixed and set on the outer side of flexible plate bending section;The end of bending spring is fixed with the straight section of flexible plate by bolt, nut, the boss is set on the bolt, nut is resisted on the end face of boss, the head of bolt and nut are left with the gap of accommodating the thickness of flexible plate and bending spring, boss and the through hole on bending spring, the waist-shaped hole on flexible plate are gap matched. By being laid on the surface of flexible plate with the bending spring of metal elasticity, the flexible plate with only flexible characteristic is provided with elastic characteristic, realizes that flexible plate is automatically contracted back along the set path after the disappearance of tensile external force, after adding bending spring in the bending position of flexible plate, the wear resistance of the place can be greatly enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to a flexible board assembly, in particular to a flexible board assembly with a bending spring and capable of realizing path fixation. BACKGROUND

[0002] In order to meet the requirements of miniaturization, lightness and integration of current missile-borne products, a flexible board assembly is often applied in product design. The flexible board assembly can work reliably for a long time in harsh environments such as high and low temperature, high humidity, vibration, salt spray and low air pressure. The flexible board assembly is a system module composed of a flexible circuit board and electronic components. It can not only replace cable assemblies to complete high-reliability signal transmission, but also has the function of carrying electronic components.

[0003] The flexible board assembly has the following advantages: it is thin and light, the signal lines in the flexible board assembly are integrated in high density in the form of printed lines on the flexible board, so that the volume of the flexible board assembly is small and the weight is light; the circuit board is applied from two dimensions to three dimensions to realize three-dimensional assembly, and the circuit board interface is not limited by position and angle; the printed line interconnection in the flexible board assembly is pre-fabricated by CAD design, which reduces the wire connection process and improves production efficiency and product consistency. The flexible board assembly can realize cable-free design, improve product reliability and optimize product layout space.

[0004] During use, the length of the flexible board assembly is too long, so that its bending state is not fixed after each assembly, which may interfere with other structures of the equipment and cause quality problems. Forced fixation of the flexible board assembly will cause the flexible board to lose the function of stretching and retracting. During the integrated assembly and use of the flexible board assembly, the stretching function is required to facilitate installation, and after the flexible board assembly is retracted after assembly, the uniqueness of the bending path is realized to prevent interference with other structures of the equipment. SUMMARY

[0005] To solve the technical problem that the assembled flexible board assembly is prone to interfere with other structures of the equipment, the present application provides a flexible board assembly with a bending spring and capable of realizing path fixation.

[0006] The purpose of the present application is achieved by the following technical scheme. According to the present application, a flexible board assembly with a bending spring and capable of realizing path fixation is provided, which comprises a flexible board and a bending spring made of elastic material. The flexible board is bent and arranged in the corresponding equipment, the bending section of the flexible board is provided with the bending spring, the bending angle of the bending spring is equal to the bending angle of the corresponding bending section of the flexible board, and the bending spring is fixedly arranged on the outer side of the bending section of the flexible board. The length of the bending spring is greater than the length of the bending section of the flexible board, the end of the bending spring is fixed with the straight section of the flexible board through a bolt and a nut, a boss is arranged on the bolt, the nut is arranged on the end face of the boss, a gap accommodating the thickness of the flexible board and the bending spring is left between the head of the bolt and the nut, and the boss is gap-fitted with the through hole on the bending spring and the waist-shaped hole on the flexible board.

[0007] Further, the material of the bending spring is selected as 0Cr17Ni7Al stainless steel belt, and the bending spring is cut and bent from the stainless steel belt.

[0008] Further, the bending spring is bent by cold working the stainless steel belt, and the bending spring after cold working is heat treated.

[0009] Further, two fixing ears are arranged at both ends of the bending spring, the two fixing ears are respectively located at both sides of the end of the bending spring, are integrally cut and formed with the bending spring, and a through hole is formed in the fixing ear; a mounting portion is arranged at a position corresponding to the fixing ear on the flexible plate, a waist-shaped hole is arranged on the mounting portion, the extension direction of the waist-shaped hole is consistent with the extension direction of the length of the flexible plate, and a bolt is arranged in the through hole and the waist-shaped hole.

[0010] Further, the boss is arranged between the head of the bolt and the threaded column, and the diameter of the boss is larger than the diameter of the threaded column.

[0011] Further, the bending spring is the same in shape as the flexible plate at the position of the corresponding bending section.

[0012] Further, the flexible plate is bent to form an S-shaped bending path, the bending angle of the bending section of the flexible plate is 180°, and correspondingly, the bending angle of the bending spring is 180°.

[0013] Further, the bending angle of the bending section of the flexible plate is one or more of 45°, 60°, 90° and 135°, and correspondingly, the bending angle of the bending spring is one or more of 45°, 60°, 90° and 135°.

[0014] Further, a plurality of bending springs are arranged on the flexible plate, and after the flexible plate is straightened, adjacent bending springs are respectively located on different surfaces of the flexible plate.

[0015] Further, one end of the flexible plate assembly is connected with the equipment in the front cabin section, and the other end is connected with the equipment in the rear cabin section.

[0016] Compared with the prior art, the present application has the advantages of:

[0017] By applying flexible springs with metallic elasticity to the surface of the flexible plate, the originally only flexible plate acquires elastic properties. This allows the flexible plate to automatically retract along a predetermined path after the tensile force disappears, solving existing technical problems: when a simple flexible plate needs to retract after stretching, it must be manually retracted. In the confined space of the compartment, the position of the flexible plate is uncertain after each manual retraction, which can easily lead to wear between the flexible plate and other equipment structures. In addition, the bending points of the flexible plate are generally risk points for contact and wear with other equipment structures. Adding springs to these points can greatly enhance the wear resistance of these areas, achieving integrated electrical structure design and greatly improving product reliability. The springs, flexible plate, and bolt bosses are fitted with clearance, and the flexible plate is provided with waist-shaped holes. When the flexible plate is in a bending state, each piece of the flexible plate undergoes relative displacement, improving the bending state of the flexible plate.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of the present invention having a self-recovery path component;

[0020] Figure 2 for Figure 1 A schematic diagram of the bending spring in the illustrated embodiment;

[0021] Figure 3 for Figure 1 A schematic diagram of the bolt;

[0022] Figure 4 for Figure 1 The diagram shows the bending spring, bolt, and nut.

[0023] Figure 5 for Figure 1 The diagram shown is a schematic diagram of the cabin equipment before installation in the embodiment shown.

[0024] Figure 6 for Figure 1 The diagram shown is a schematic diagram of the installed equipment in the module of the embodiment.

[0025] Figure 7 for Figure 1 The diagram shows the connection of the bending spring, flexible plate, bolt, and nut when the embodiment is in the straightened state.

[0026] Figure 8 for Figure 1 The diagram shows the arrangement of the bending spring, flexible plate, bolt, and nut when the embodiment is in a bent state.

[0027] REFERENCE NUMERALS

[0028] 1-flexible board, 2-bending spring, 201-fixing ear, 202-through hole, 3-bolt, 301-head, 302- boss, 303-ring groove, 304-threaded column, 4-nut, 5-front cabin section equipment, 6- rear cabin section equipment. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] An embodiment of the flexible board assembly with a bending spring and capable of realizing path fixation is shown in FIG. 1, hereinafter referred to as the assembly. The assembly comprises a flexible board 1 and a bending spring 2. The flexible board 1 is a flexible circuit board in the prior art, and is connected to corresponding equipment at both ends thereof for conducting electricity or transmitting signals. Figures 1 to 4

[0031] The bending spring 2 is made of 0Cr17Ni7Al stainless steel strip. In the process of making the bending spring 2 from the stainless steel strip, the width and length of the stainless steel strip after cutting are determined according to the width and length of the bending section of the flexible board 1, and the width of the stainless steel strip after cutting is equal to the width of the bending section of the flexible board. In other embodiments, the width of the stainless steel strip after cutting can not be equal to the width of the bending section of the flexible board. The length of the stainless steel strip after cutting is greater than the length of the bending section of the flexible board, so that the two ends of the finished bending spring can be firmly fixed on the flexible board. After cutting, the bending spring is bent according to the designed shape of the bending spring. In designing the bending shape of the bending spring 2, the shape of the flexible board 1 after assembly in the equipment is designed first. The flexible board 1 is bent multiple times after assembly and does not interfere with other structures in the equipment. After the design of the flexible board 1 is completed, the number of bending springs 2 and the bending angle of each bending spring are designed according to the bending times of the flexible board 1 and the bending angle of each bending section of the flexible board. Then, the stainless steel strip after cutting is bent into a bending spring. The number of the bending spring is the same as the bending times of the flexible board, and the bending angle of each bending spring is equal to the bending angle of the corresponding bending section of the flexible board. The shape of the bending spring at the position corresponding to the bending section of the flexible board is the same as the shape of the flexible board at the position.

[0032] In bending the bending spring 2, the stainless steel strip after cutting is first bent into the designed shape by cold working. Then, the bending spring 2 after cold working is heat treated to ensure its bending characteristics, so that after the finished bending spring 2 is fixed to the corresponding bending section of the flexible board, the flexible board 1 has elasticity and binds the path of the flexible board 1 by elastic force.​

[0033] In other embodiments, other materials with fixed shapes and elastic deformation can also be used to make the bending spring.

[0034] After the bending spring is processed, each bending spring is installed on the corresponding bending section of the flexible plate. In this embodiment, the shape of the bending spring 2 is the same as the shape of the flexible plate at the corresponding installation position. The bending spring 2 is installed on the outside of the bending section of the flexible plate and is wrapped around the bending section of the flexible plate. The inner side of the bending spring 2 is tightly attached to the outer side of the bending section of the flexible plate, and the bending spring 2 protects the outer side of the bending section of the flexible plate. After the bending spring is installed, it is fixed with the flexible plate. The length of the bending spring is greater than the length of the bending section of the flexible plate, and the two ends of the bending spring are straight and extend out of the bending section of the flexible plate after installation. The ends of the bending spring are fixed with the straight section of the flexible plate, so that the bending spring can be firmly fixed with the flexible plate. The outer side of the bending position of the flexible plate is often prone to contact and wear with other structures of the equipment. After the bending spring is installed, it can also protect the flexible plate. At the same time, the bending spring 2 is installed on the outside of the bending position of the flexible plate, which is easy to install.

[0035] In this embodiment, the shape of the flexible plate 1 after assembly in the equipment is as shown in Figure 1 The flexible plate 1 forms an S-shaped bending path, and the flexible plate 1 is bent twice to form three parallel straight sections of the flexible plate. The adjacent two straight sections of the flexible plate are connected by a bending section of the flexible plate bent by 180°. The shape of the bending section of the flexible plate is U-shaped, and the corresponding bending spring 2 is attached to the curved surface on the outside of the bending section of the flexible plate. The shape of the bending spring 2 is the same as that of the bending section of the flexible plate, which is also U-shaped.

[0036] The bending spring 2 is installed at the bending position of the flexible plate 1 to make the flexible plate 1 have elasticity at the bending position. In other embodiments, the bending spring 2 can also be bent to a specific angle of 45°, 60°, 90°, 135°, etc. to adapt to the bending path of different flexible plates 1 and different bending angles at different positions of the flexible plate. By using multiple bending springs in combination with the flexible plate, the flexible plate can be laid according to the designed path, and the path of the flexible plate will not interfere with other structures of the equipment.

[0037] If the length of the flexible plate 1 is relatively long and needs to be bent multiple times, a bending spring 2 is arranged at each bending position. After the flexible plate 1 is straightened, the adjacent bending springs 2 are located on different surfaces of the flexible plate 1. Multiple bending springs 2 are distributed on the flexible plate 1, and the bending springs 2 are arranged at intervals. Only the bending spring 2 is installed as an elastic component at the bending position of the flexible plate 1, so that the length of the bending spring 2 is relatively short, easy to process, and easy to maintain elasticity, and not prone to plastic deformation after a long time.

[0038] In the embodiment, the bending spring 2 is fixed on the flexible plate 1 by the bolt 3. When the bending spring 2 is designed and manufactured, two fixing ears 201 are arranged at both ends of the bending spring 2, and the two fixing ears 201 are integrally cut and formed on both sides of the ends of the bending spring 2. The through hole 202 is arranged on the fixing ear 201. The mounting part is arranged on the flexible plate at the corresponding position of the fixing ear 201. The mounting hole is arranged on the mounting part. After the bending spring 2 is mounted on the bending section of the flexible plate, the through hole 202 is aligned with the mounting hole. Then, the special bolt 3 is used for assembly.

[0039] The bolt 3 sequentially comprises a head 301, a boss 302, an annular groove 303 and a threaded column 304 from one end to the other end. The diameter of the boss 302 is greater than the diameter of the threaded column 304. After the bending spring 2 is matched with the flexible plate 1, the through hole 202 on the bending spring 2 is aligned with the corresponding mounting hole on the flexible plate 1. The bolt 3 is sequentially inserted through the mounting hole on the flexible plate and the through hole 202. Then, the nut 4 is screwed on the threaded column 304. The inner side end surface of the nut 4 abuts against the end surface of the boss 302. The gap is left between the nut 4 and the head 301. The flexible plate 1 and the bending spring 2 are arranged in the gap. The total thickness of the flexible plate 1 and the bending spring 2 is less than the thickness of the gap. The gap provides space for the bending deformation of the flexible plate 1. In the embodiment, the flexible plate 1 comprises four pieces arranged in a stack. The mounting hole on the flexible plate is a waist-shaped hole. The extension direction of the waist-shaped hole is the length extension direction of the flexible plate. The boss 302 is gap-fitted with the waist-shaped hole and the through hole 202. When the flexible plate 1 is in the bending state, each piece of the flexible plate is relatively displaced, thereby improving the bending state of the flexible plate.

[0040] The docking of the front and rear cabin sections in the elastic load product is taken as an example for description. Before the front and rear cabin sections are docked, one end of the assembly is mounted on the rear cabin section device 6, and the other end of the assembly is mounted on the front cabin section device. The assembly is pulled out from the rear cabin section, so that the flexible plate assembly is straightened, as shown in FIG. 6. The flexible plate assembly is first electrically interconnected with the front cabin section device. Then, when the front and rear cabin section structures are close to each other for docking, the flexible plate 1 is automatically retracted along the predetermined path under the elastic force of the bending spring 2, as shown in FIG. 7. Figure 5 Figure 6

[0041] The bending spring 2 with metal elasticity is arranged on the surface of the flexible plate 1, so that the flexible plate 1 originally only has the flexible characteristic and has the elastic characteristic. The flexible plate 1 is automatically retracted along the set path after the stretching external force disappears. The existing technical problem is solved. The flexible plate needs to be manually retracted when it needs to be retracted after being stretched and elongated. In the narrow space of the cabin section, the position of the flexible plate 1 is not fixed after being manually inserted each time, and the flexible plate 1 is easily abraded with other structures of the device. In addition, the bending position of the flexible plate is a risk point of being abraded with other structures of the device. The bending spring is additionally arranged at the position, so that the wear resistance of the position is greatly improved. The electrical structure is integrally designed, and the reliability of the product is greatly improved.​​

[0042] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A flexible plate assembly with curved springs and path fixing, comprising a flexible plate (1), characterized in that: The bending spring (2) is made of elastic material, the flexible plate (1) is bent and arranged in the corresponding equipment, the bending section of the flexible plate (1) is provided with the bending spring (2), the bending angle of the bending spring (2) is equal to the bending angle of the corresponding bending section of the flexible plate, and the bending spring (2) is fixedly arranged on the outer side of the bending section of the flexible plate (1); the length of the bending spring is greater than the length of the bending section of the flexible plate, the end of the bending spring is fixed with the straight section of the flexible plate through a bolt and a nut, a boss is arranged on the bolt, the nut abuts against the end face of the boss, a gap with the thickness of the flexible plate and the bending spring is left between the head of the bolt and the nut, and the boss is matched with the through hole on the bending spring and the waist-shaped hole on the flexible plate.

2. The flexible plate assembly with curved springs and path fixation according to claim 1, characterized in that: The bending spring (2) is made of stainless steel strip 0Cr17Ni7Al.

3. The flexible plate assembly with curved springs and path fixation according to claim 2, characterized in that: The bending spring is made of cold-processed stainless steel strip, and the bending spring after cold processing is subjected to heat treatment.

4. The flexible plate assembly with curved springs and path fixation capability of claim 1, wherein: The two ends of the bending spring are provided with two fixing ears, the two fixing ears are located on the two sides of the end of the bending spring, are integrally cut and formed with the bending spring, and a through hole is formed in the fixing ear; an installation part is arranged at the corresponding position of the fixing ear on the flexible plate, a waist-shaped hole is arranged on the installation part, the extension direction of the waist-shaped hole is consistent with the length extension direction of the flexible plate, and a bolt is arranged in the through hole and the waist-shaped hole.

5. The flexible plate assembly with curved springs and path fixation capability of claim 4, wherein: The boss is arranged between the head of the bolt and the threaded column, and the diameter of the boss is greater than the diameter of the threaded column.

6. The flexible plate assembly with curved springs and path fixation capability of claim 1, wherein: The bending spring is the same as the shape of the flexible plate at the position of the corresponding bending section.

7. The flexible plate assembly with curved springs and path fixation of claim 1, wherein: The flexible plate (1) is bent to form an S-shaped bending path, the bending angle of the bending section of the flexible plate is 180°, and the corresponding bending angle of the bending spring is 180°.

8. The flexible plate assembly with curved springs and path fixation capability of claim 1, wherein: The bending angle of the bending section of the flexible plate is one or more of 45°, 60°, 90° and 135°, and the corresponding bending angle of the bending spring is one or more of 45°, 60°, 90° and 135°.

9. The flexible plate assembly with curved springs and path fixation capability of claim 1, wherein: A plurality of bending springs are arranged on the flexible plate, and adjacent bending springs are arranged on different surfaces of the flexible plate after the flexible plate is straightened.

10. The flexure assembly with a curved spring and path constraint of claim 1, wherein: One end of the flexible plate assembly is connected with the equipment of the front cabin section, and the other end is connected with the equipment of the rear cabin section.

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