An optical fiber gyroscope on-board integrated connection device

Abstract

The application discloses an optical fiber gyroscope on-board integrated connecting device, and particularly relates to the technical field of on-board conductive connection, which comprises a solidifying seat, a plurality of conductive terminals, a plurality of connecting terminals, a sliding block and a pressing mechanism, the inner wall of the solidifying seat is fixed with the plurality of conductive terminals; the plurality of connecting terminals are respectively connected to one end of the plurality of conductive terminals; the sliding block is slidingly connected to the inner wall of the solidifying seat; and the pressing mechanism is installed on the upper surface of the sliding block. The application provides self-adaptive full-process continuous radial and axial bidirectional pre-tightening force, dynamically compensates the micro-gap of the welding spot, offsets the shrinkage relaxation of the colloid, improves the contact reliability and long-term stability of the on-board conductive connection of the optical fiber gyroscope, and greatly reduces the rework rate, thereby solving the problems that it is difficult to self-adaptively apply continuous pre-tightening force to the conductive connection through multi-point connection and the rework rate greatly increases.

Description

Technical Field

[0001] This invention relates to the field of onboard conductive connection technology, and more specifically, to an onboard integrated connection device for a fiber optic gyroscope. Background Technology

[0002] The conductive connection of the onboard integrated connection device for fiber optic gyroscopes plays a crucial role in constructing a low-impedance, high-integrity electrical path. This ensures precise power supply and lossless transmission of weak signals between the gyroscope's core optoelectronic components and signal processing circuits. This not only effectively suppresses electromagnetic interference and guarantees stable output of high-precision angular velocity measurement data, but also eliminates potential differences through a unified grounding loop design, preventing noise introduced by ground loops. Consequently, it provides a reliable data reference and long-term stability for the inertial navigation system.

[0003] The onboard multi-terminal conductive connection of fiber optic gyroscopes requires spot welding and high-temperature curing to enhance reliability. However, the existing process has significant defects: micro-displacement occurs due to personnel movement during the curing process, and the thermal expansion and contraction effect during high-temperature curing causes the solder joint interface to loosen. Furthermore, the curing adhesive is difficult to adaptively apply continuous pre-tightening force to the conductive connection points during the heat cross-linking process. As a result, poor conductive contact frequently occurs after the onboard integrated conductive connection of the fiber optic gyroscope is cured, leading to a high rework rate. Summary of the Invention

[0004] To overcome the shortcomings of existing fiber optic gyroscope onboard multi-terminal conductive connections which involve spot welding and high-temperature curing, and which can continuously apply bidirectional pre-tightening force to each conductive point throughout the process to suppress micro-displacement of the solder joints and loosening of the interface, thereby significantly reducing contact problems and insufficient rework rate, this invention proposes the following technical solution: an onboard integrated connection device for fiber optic gyroscopes, including a curing base, wherein multiple conductive terminals are fixed on the inner wall of the curing base. Multiple connection terminals are respectively connected to one end of multiple conductive terminals; The sliding block is slidably connected to the inner wall of the curing base; A pressing mechanism is installed on the upper surface of the sliding block. Multiple pressing shafts are mounted on the pressing mechanism, and the pressing shafts are slidably connected to the conductive terminals. An adaptive linkage mechanism is installed on one side of the sliding block, and the adaptive linkage mechanism is provided with multiple contact springs and multiple terminal heads; When the adaptive linkage mechanism expands due to heat, it drives the sliding block to slide along the inner wall of the curing seat. The sliding block drives the pressing mechanism and each of the pressing shafts to move synchronously. Each pressing shaft pushes each of the conductive terminals to press them toward the corresponding connection terminal. At the same time, the adaptive linkage mechanism pushes each of the contact springs and each of the terminal heads to perform a clamping operation.

[0005] In a preferred embodiment, the pressing mechanism includes: A raised shaft is fixedly installed on the upper surface of the sliding block. A sleeve is slidably connected to the outer wall of the raised shaft. The sleeve abuts against the curing seat. Multiple pressure shafts are fixedly connected to the sleeve. Each of the conductive terminals has an inclined groove on its outer wall, which is used to guide the movement of the pressure shaft.

[0006] In a preferred embodiment, the top surface of the convex shaft and the upper surface of the sleeve strip are on the same horizontal plane; A gap is provided between the sliding block and the sleeve strip.

[0007] In a preferred embodiment, the plurality of pressure shafts are arranged sequentially from left to right, and the plurality of pressure shafts are aligned with the plurality of inclined slide grooves one by one.

[0008] In a preferred embodiment, the adaptive linkage mechanism includes: Multiple expansion springs are fixedly connected to one side of the sliding block, and one end of each expansion spring is fixedly connected to the curing seat. The multiple expansion springs are arranged sequentially from top to bottom. A sliding sleeve is provided on one side of the expansion spring strip. The sliding sleeve is fixedly connected to the curing seat. The inner wall of the sliding sleeve is provided with a pull rope. The pull rope is used to slide along the inner wall of the sliding sleeve. One end of the pull rope is fixedly connected to the sliding block. A pull bar is fixedly installed at the other end of the pull rope, and a rotating sleeve is fixed at the top of the pull bar; A rotating shaft is fixedly connected to the inner wall of the rotating sleeve, and the rotating shaft is used to rotate within the inner wall of the curing seat; Multiple linkage sleeves are fixedly connected to the outer wall of the rotating shaft, and each of the multiple linkage sleeves is respectively aligned with a multiple contact spring piece; Each of the linkage sleeves has a pressure block fixed to its outer wall, the pressure block being used to abut the terminal head; Each of the linkage sleeves has a side pressure strip fixedly installed on its outer wall and at one side of the pressure block. The side pressure strip is used to abut against the contact spring. The connecting terminal and the terminal head are both fixedly connected to the contact spring.

[0009] In a preferred embodiment, the rotating sleeve is slidably connected to the pulling rope, and the cross-sectional shape of the rotating sleeve is rectangular; A gap is provided between the sliding sleeve and the rotating sleeve.

[0010] In a preferred embodiment, the bottom end of the pressure block is rounded, and a gap is provided between the pressure block and the side pressure strip; The plurality of pressure blocks and the plurality of side pressure strips are arranged sequentially from left to right.

[0011] In a preferred embodiment, the bottom end of the connecting terminal is connected to a substrate, and the plurality of connecting terminals and the curing base are all fixedly connected to the substrate; Two wire inlets are fixed on the upper surface of the substrate, away from the connection terminal, and a conductive head is fixedly connected to one end of the conductive terminal.

[0012] Advantages of the present invention.

[0013] 1. This invention injects heat-curing colloid into the solder joint position inside the curing base. During heat curing, the adaptive linkage mechanism is driven by thermal expansion to move the sliding block to the left along the inner wall of the curing base, which drives the pressing mechanism to press each pressure shaft against the conductive terminal. Simultaneously, it pushes the contact spring to press against the terminal head. The radial and axial bidirectional pre-tightening force is continuously applied throughout the process, dynamically compensating for the micro gap of the solder joint, counteracting the shrinkage and relaxation of the colloid, stabilizing the contact pressure of each conductive connection point, improving the contact reliability and long-term stability of the conductive connection on the fiber optic gyroscope board, and significantly reducing the rework rate.

[0014] 2. In this invention, the sliding block moves to the left along the inner wall of the curing seat, causing the convex shaft and the sleeve to move synchronously. This drives multiple pressure shafts to slide along the inclined groove, stably pressing the conductive terminal to tighten the connecting terminal. After curing is completed and the room temperature is restored, the upward-moving sleeve separates along the outer wall of the convex shaft, causing the pressure shaft to detach from the conductive terminal. This completely cuts off the path of the reset force transmission after the expansion spring shrinks and cools, allowing the conductive terminal and the connecting terminal to maintain a stable connection for a long time. Moreover, it saves the structural cost of multiple convex shafts, sleeves, and multiple inclined grooves, and allows for reuse.

[0015] 3. The invention employs an expansion spring that expands under heat and is stably supported by a curing seat. This drives a sliding block to move smoothly to the left along the inner wall of the curing seat, which in turn drives a pull rope to pull a pull bar along a sliding sleeve guide. This drives a rotating sleeve to rotate the rotating shaft clockwise in sync. Through a linkage sleeve, the pressure block is pressed against the top of the terminal head, and the side pressure bar is pressed against the top of the contact spring. This provides a continuous and stable pressing force at both ends of each contact spring and terminal head throughout the process. Attached Figure Description

[0016] Figure 1 This is a top view of the onboard integrated connection device for the fiber optic gyroscope of the present invention.

[0017] Figure 2 This is a partial structural diagram of the connection between the curing base and the connecting terminal of the present invention.

[0018] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0019] Figure 4 This is a schematic diagram of the main structure of the pressing mechanism of the present invention.

[0020] Figure 5This is a partial structural diagram of the connection between the conductive terminal and the pressure shaft of the present invention.

[0021] Figure 6 This is a top view of the adaptive linkage mechanism of the present invention.

[0022] Figure 7 This is a partial structural diagram of the connection between the pull rope and the sliding sleeve of the present invention, viewed from below.

[0023] Figure 8 This is a partial structural diagram of the connection between the rotating shaft and the linkage sleeve of the present invention.

[0024] The attached figures are labeled as follows: 1. Curing base; 2. Conductive terminal; 3. Connecting terminal; 4. Sliding block; 5. Contact spring; 6. Terminal head; 7. Raised shaft; 8. Socket strip; 9. Slanted slide groove; 10. Expansion spring; 11. Sliding sleeve; 12. Pull rope; 13. Pull strip; 14. Rotating shaft; 15. Linkage sleeve; 16. Pressure block; 17. Side pressure strip; 18. Rotating sleeve; 19. Pressure shaft; 20. Conductive head; 21. Inlet head; 22. Substrate. Detailed Implementation

[0025] The technical solution will now be described in detail and completely with reference to the embodiments and accompanying drawings of the present invention.

[0026] Example 1: As Figures 1-8 The illustrated fiber optic gyroscope onboard integrated connection device includes a curing base 1, with multiple conductive terminals 2 fixed to the inner wall of the curing base 1; multiple connecting terminals 3, each connected to one end of the multiple conductive terminals 2; a sliding block 4, slidably connected to the inner wall of the curing base 1; a pressing mechanism, mounted on the upper surface of the sliding block 4, with multiple pressing shafts 19 mounted on the pressing mechanism, and the pressing shafts 19 slidably connected to the conductive terminals 2; and an adaptive linkage mechanism, mounted on one side of the sliding block 4, with multiple contact springs 5 ​​and multiple terminal heads 6.

[0027] The principle of this technology is as follows: First, conductive terminals 2 and connecting terminals 3 are spot-welded together, and terminal heads 6 are spot-welded to conductive terminals 2. This process is repeated to connect multiple connecting terminals 3 and multiple conductive terminals 2 one by one. Then, heat-curing adhesive is injected into the connection points between multiple conductive terminals 2 and connecting terminals 3, and between conductive terminals 2 and terminal heads 6, inside the curing base 1. The substrate 22, curing base 1, and conductive heads 20 are then placed in a heat-curing machine to heat the adhesive. During heating, the adaptive linkage mechanism drives the sliding block 4 to slide to the left along the inner wall of the curing base 1 when it expands due to heat. The sliding block 4 drives the pressing mechanism, causing each pressure shaft 19 to move synchronously. 9. Each conductive terminal 2 is axially pressed towards the corresponding connecting terminal 3; at the same time, the adaptive linkage mechanism pushes each contact spring 5 and each terminal head 6 to perform radial clamping operation. This clamping operation continuously applies a bidirectional pre-tightening force in both the radial and axial directions throughout the high-temperature curing process. This can dynamically compensate for the micro gaps caused by thermal expansion and contraction at the solder joint interface, and also counteract the contact relaxation caused by the cross-linking shrinkage of the cured adhesive. This ensures that the conductive connection points of each connecting terminal 3 and each conductive terminal 2 always maintain contact pressure, while also ensuring that each terminal head 6 and each conductive terminal 2 always maintain a constant contact pressure. This effectively suppresses fretting wear and contact resistance drift, and improves the contact reliability and long-term stability of the onboard conductive connection of the fiber optic gyroscope after curing.

[0028] Example 2: In this example, as... Figures 2-5 As shown, the pressing mechanism includes: a raised shaft 7, fixedly mounted on the upper surface of the sliding block 4; a sleeve 8 slidably connected to the outer wall of the raised shaft 7, the sleeve 8 abutting against the curing seat 1; and multiple pressing shafts 19 fixedly connected to the sleeve 8. Each conductive terminal 2 has an inclined groove 9 on its outer wall, which guides the movement of the pressing shaft 19. The top surface of the raised shaft 7 and the upper surface of the sleeve 8 are at the same horizontal plane; a gap is provided between the sliding block 4 and the sleeve 8. The multiple pressing shafts 19 are arranged sequentially from left to right, and each pressing shaft 19 is aligned with one of the multiple inclined grooves 9.

[0029] The principle of this technology is as follows: when the sliding block 4 moves to the left, it slides along the inner wall of the curing seat 1, and the sliding block 4 drives the convex shaft 7 to move to the left. The convex shaft 7 causes the sleeve 8 to move to the left along the upper surface of the curing seat 1. The sleeve 8 drives multiple pressure shafts 19 to move to the left simultaneously. The pressure shafts 19 are guided to move to the left along the inner wall of the inclined slide groove 9. Since the inclined slide groove 9 is inclined, the pressure shafts 19 will press the conductive terminal 2 against the inner wall of the inclined slide groove 9, causing the conductive terminal 2 to move forward and press against the connecting terminal 3. At the same time, the substrate 22 supports multiple connecting terminals 3. Each pressure shaft 19 pushes each conductive terminal 2 to press against the corresponding connecting terminal 3, ensuring that the connection between the connecting terminal 3 and the conductive terminal 2 is more secure when cured, stabilizing the contact pressure of each conductive connection point, and improving the contact reliability and long-term stability of the conductive connection on the fiber optic gyroscope board.

[0030] Secondly, after the final conductive connection is cured and the room temperature is restored, the sleeve 8 can be moved upward. The sleeve 8 moves upward along the outer wall of the convex shaft 7 and separates. The sleeve 8 drives multiple pressure shafts 19 to move upward. The multiple pressure shafts 19 separate from the multiple conductive terminals 2 respectively. In this way, even after the expansion spring 10 returns to room temperature, the cold contraction of the multiple expansion springs 10 will no longer exert a rightward reset force on the sliding block 4, the sliding block 4 will no longer exert a rightward reset force on the convex shaft 7, the convex shaft 7 will no longer exert a rightward reset force on the sleeve 8, the sleeve 8 will no longer exert a rightward reset force on the pressure shaft 19, and the pressure shaft 19 will no longer exert a rightward reset force on the conductive terminals 2. This avoids the multiple expansion springs 10 exerting a continuous rightward reset force on the multiple conductive terminals 2 after the cold contraction is restored, and avoids the problem of loosening between the conductive terminals 2 and the connecting terminals 3. In addition, reusing multiple pressure shafts 19, sleeve 8 and convex shaft 7 saves costs.

[0031] Example 3: In this example, as... Figures 2-8As shown, the adaptive linkage mechanism includes: multiple expansion springs 10, all fixedly connected to one side of the sliding block 4, with one end of each expansion spring 10 fixedly connected to the curing seat 1, and the multiple expansion springs 10 arranged sequentially from top to bottom; a sliding sleeve 11, disposed on one side of the expansion springs 10, fixedly connected to the curing seat 1, with a pull rope 12 on the inner wall of the sliding sleeve 11 for sliding along the inner wall of the sliding sleeve 11, and one end of the pull rope 12 fixedly connected to the sliding block 4; and a pull bar 13, fixedly installed at the other end of the pull rope 12, with the top end of the pull bar 13 fixedly connected to the sliding block 4. A rotating sleeve 18 is fixedly attached; a rotating shaft 14 is fixedly connected to the inner wall of the rotating sleeve 18, and the rotating shaft 14 is used to rotate within the inner wall of the curing base 1; multiple linkage sleeves 15 are fixedly connected to the outer wall of the rotating shaft 14, and the multiple linkage sleeves 15 are respectively aligned with multiple contact springs 5; a pressure block 16 is fixedly attached to the outer wall of each linkage sleeve 15, and the pressure block 16 is used to abut against the terminal head 6; a side pressure strip 17 is fixedly installed on the outer wall of each linkage sleeve 15 and on one side of the pressure block 16, and the side pressure strip 17 is used to abut against the contact spring 5. The connecting terminal 3 and the terminal head 6 are both fixedly connected to the contact spring 5. The rotating sleeve 18 is slidably connected to the pulling rope 12, and the cross-sectional shape of the sliding sleeve 11 is rectangular; there is a gap between the sliding sleeve 11 and the rotating sleeve 18; the bottom end of the pressure block 16 is rounded, and there is a gap between the pressure block 16 and the side pressure strip 17; the multiple pressure blocks 16 and the multiple side pressure strips 17 are arranged sequentially from left to right.

[0032] The principle of this technology is as follows: when multiple expansion springs 10 expand, some of which are made of high-expansion alloy, the right ends of the multiple expansion springs 10 are supported by the curing seat 1, while the left ends of the multiple expansion springs 10 expand and compress the sliding block 4. The sliding block 4 is driven to move to the left along the inner wall of the curing seat 1. When the sliding block 4 pulls the left end of the pull rope 12, the pull rope 12 slides along the inner wall of the sliding sleeve 11. At the same time, the pull rope 12 pulls the pull bar 13, which drives the rotating sleeve 18 to rotate clockwise. The rotating sleeve 18 drives the rotating shaft 14 to rotate steadily clockwise along the inside of the curing seat 1. The rotating shaft 14 drives multiple... The moving sleeve 15 rotates clockwise, and the linkage sleeve 15 drives the pressure block 16 to rotate clockwise. The pressure block 16 presses the top of the terminal head 6, and the terminal head 6 presses the top of the conductive terminal 2. At the same time, the linkage sleeve 15 drives the side pressure strip 17 to rotate clockwise, and the side pressure strip 17 presses the top of the contact spring 5. Each contact spring 5 and each terminal head 6 can continuously provide a pressing operation. The entire transmission action has strong synchronization and runs smoothly without jamming. It can output the same pressing force to all terminal heads 6 and contact springs 5 ​​at the same time. There is no additional manual intervention throughout the process. It is compatible with the high-temperature curing process of multi-terminal conductive connection on the fiber optic gyroscope board, so that each conductive point always maintains a stable contact state.

[0033] Example 4: In this example, as... Figure 1As shown, the bottom end of the connecting terminal 3 is connected to the substrate 22, and multiple connecting terminals 3 and the curing base 1 are fixedly connected to the substrate 22; two wire inlets 21 are fixed on the upper surface of the substrate 22 away from the connecting terminals 3, and a conductive head 20 is fixedly connected to one end of the conductive terminal 2.

[0034] The principle of this technology is to electrically connect the fiber optic gyroscope's transmission end to two input terminals 21. Simultaneously, the input terminals 21 are conductively connected to the fiber optic gyroscope substrate 22, and the substrate 22 is connected to multiple connection terminals 3. The connection terminals 3 are conductively connected to the contact springs 5, the contact springs 5 ​​are conductively connected to the terminal heads 6, and the terminal heads 6 are conductively connected to the conductive terminals 2. At the same time, the connection terminals 3 and the conductive terminals 2 are connected, and the conductive terminals 2 are conductively connected to the conductive head 20, thus forming a conductive connection operation.

[0035] The above description is only a preferred embodiment of the present invention. Any modifications, equivalent substitutions, or improvements made within the technical concept and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An onboard integrated connection device for a fiber optic gyroscope, comprising a curing base (1), wherein a plurality of conductive terminals (2) are fixed on the inner wall of the curing base (1). Multiple connecting terminals (3) are respectively connected to one end of multiple conductive terminals (2); Its features are: The sliding block (4) is slidably connected to the inner wall of the curing base (1); A pressing mechanism is installed on the upper surface of the sliding block (4). Multiple pressing shafts (19) are installed on the pressing mechanism, and the pressing shafts (19) are slidably connected to the conductive terminal (2). An adaptive linkage mechanism is installed on one side of the sliding block (4), and the adaptive linkage mechanism is provided with multiple contact springs (5) and multiple terminal heads (6). When the adaptive linkage mechanism is heated and expanded, it drives the sliding block (4) to slide along the inner wall of the curing seat (1). The sliding block (4) drives the pressing mechanism and each of the pressing shafts (19) to move synchronously. Each of the pressing shafts (19) pushes each of the conductive terminals (2) to press against the corresponding connecting terminal (3). At the same time, the adaptive linkage mechanism pushes each of the contact springs (5) and each of the terminal heads (6) to perform a clamping operation.

2. The onboard integrated connection device for a fiber optic gyroscope according to claim 1, characterized in that: The pressing mechanism includes: A convex shaft (7) is fixedly installed on the upper surface of the sliding block (4). A sleeve (8) is slidably connected to the outer wall of the convex shaft (7). The sleeve (8) abuts against the curing seat (1). Multiple pressure shafts (19) are fixedly connected to the sleeve (8). Each of the conductive terminals (2) has an inclined groove (9) on its outer wall, which is used to guide the movement of the pressure shaft (19).

3. The onboard integrated connection device for a fiber optic gyroscope according to claim 2, characterized in that: The top surface of the convex shaft (7) and the upper surface of the sleeve (8) are on the same horizontal plane; A gap is provided between the sliding block (4) and the sleeve strip (8).

4. The onboard integrated connection device for a fiber optic gyroscope according to claim 2, characterized in that: Multiple pressure shafts (19) are arranged sequentially from left to right, and multiple pressure shafts (19) are aligned with multiple inclined slides (9).

5. The onboard integrated connection device for a fiber optic gyroscope according to claim 1, characterized in that: The adaptive linkage mechanism includes: Multiple expansion springs (10) are fixedly connected to one side of the sliding block (4). One end of each expansion spring (10) is fixedly connected to the curing seat (1). The multiple expansion springs (10) are arranged sequentially from top to bottom. A sliding sleeve (11) is provided on one side of the expansion spring strip (10). The sliding sleeve (11) is fixedly connected to the curing seat (1). The inner wall of the sliding sleeve (11) is provided with a pull rope (12). The pull rope (12) is used to slide along the inner wall of the sliding sleeve (11). One end of the pull rope (12) is fixedly connected to the sliding block (4). A pull bar (13) is fixedly installed at the other end of the pull rope (12), and a rotating sleeve (18) is fixed at the top of the pull bar (13). A rotating shaft (14) is fixedly connected to the inner wall of the rotating sleeve (18), and the rotating shaft (14) is used to rotate on the inner wall of the curing seat (1); Multiple linkage sleeves (15) are fixedly connected to the outer wall of the rotating shaft (14), and the multiple linkage sleeves (15) are respectively aligned with multiple contact springs (5); Each of the linkage sleeves (15) has a pressure block (16) fixed on its outer wall, the pressure block (16) being used to abut the terminal head (6). Each of the linkage sleeves (15) has a side pressure strip (17) fixedly installed on the outer wall of the sleeve and on one side of the pressure block (16). The side pressure strip (17) is used to abut against the contact spring (5). The connecting terminal (3) and the terminal head (6) are both fixedly connected to the contact spring (5).

6. The onboard integrated connection device for a fiber optic gyroscope according to claim 5, characterized in that: The rotating sleeve (18) is slidably connected to the pulling rope (12), and the cross-sectional shape of the sliding sleeve (11) is rectangular; A gap is provided between the sliding sleeve (11) and the rotating sleeve (18).

7. The onboard integrated connection device for a fiber optic gyroscope according to claim 5, characterized in that: The bottom end of the pressure block (16) is rounded, and there is a gap between the pressure block (16) and the side pressure strip (17); The plurality of pressure blocks (16) and the plurality of side pressure strips (17) are arranged sequentially from left to right.

8. The onboard integrated connection device for a fiber optic gyroscope according to claim 1, characterized in that: The bottom end of the connecting terminal (3) is connected to the substrate (22), and the multiple connecting terminals (3) and the curing base (1) are all fixedly connected to the substrate (22); Two wire inlets (21) are fixed on the upper surface of the substrate (22) away from the connection terminal (3), and a conductive head (20) is fixedly connected to one end of the conductive terminal (2).

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