An optical fiber sensor housing

Abstract

This utility model discloses a fiber optic sensor housing, including a housing body, a fiber optic assembly disposed within the housing body, and a fiber optic circuit board mounted within the housing body via the fiber optic assembly. The fiber optic assembly includes a fiber optic bracket and at least two fixing members. A first fixing member is disposed at one end of the fiber optic bracket, and a second fixing member is disposed on the housing body. Both fixing members have positioning structures for fixing the fiber optic circuit board, jointly securing the fiber optic circuit board. This device utilizes the fiber optic bracket and two fixing members to form a multi-point support structure, stably supporting and fixing the fiber optic circuit board, effectively preventing displacement and deformation of the fiber optic circuit board, and improving the accuracy of photoelectric signal conversion.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic sensor housing technology, and in particular to a fiber optic sensor housing. Background Technology

[0002] In fiber optic sensing systems, the conversion between optical and electrical signals relies on precise alignment and long-term stable connection between the fiber optic circuit board and optical components. Current technologies typically involve directly mounting or simply snapping the fiber optic circuit board onto the equipment rack or a simple support. During equipment operation, mechanical vibrations, temperature cycles, and impact loads are transmitted to the circuit board, causing rotation or translation of the mounting or snapping points. This can lead to optical path misalignment, signal attenuation, or even complete failure, and the circuit board itself may also experience irregular displacement. Once this displacement occurs, the relative position of the fiber end face and the optical components becomes difficult to maintain, resulting in output optical power drift and affecting the stability and measurement accuracy of the fiber optic sensor.

[0003] Meanwhile, repeated disassembly and maintenance will further aggravate the wear of the clips, causing the fixation reliability to continue to deteriorate. In addition, existing fixing methods generally lack buffering mechanisms for vibration and temperature stress. The circuit board is subjected to stress concentration for a long time, which significantly increases the failure rate of solder joint cracking and component detachment, increases the workload of on-site maintenance and reduces overall availability. Utility Model Content

[0004] The purpose of this invention is to provide a housing for an optical fiber sensor, which carries an optical fiber circuit board and enables reliable conversion between optical and electrical signals.

[0005] To solve the above-mentioned technical problems, this utility model provides a fiber optic sensor housing, including a housing body, a fiber optic assembly disposed within the housing body, and a fiber optic circuit board mounted within the housing body via the fiber optic assembly; wherein, the fiber optic assembly includes a fiber optic fixing frame and at least two fixing members, wherein the first fixing member is disposed at one end of the fiber optic fixing frame, and the second fixing member is disposed on the housing body, and both fixing members are provided with positioning structures for fixing the fiber optic circuit board, thereby jointly fixing the fiber optic circuit board.

[0006] Furthermore, the fiber optic mounting bracket has an L-shaped structure, including a vertical part and a horizontal part, and the first fixing member is connected to the vertical part; the first fixing member includes a body part and two pairs of fixing arms, and the two pairs of fixing arms are disposed on one side of the body part for clamping the fiber optic circuit board.

[0007] Furthermore, the two pairs of fixed arms are spaced apart along the length of the main body, and each pair of fixed arms is symmetrically arranged about the center line of the main body.

[0008] Furthermore, the main body of the first fixing member is also provided with a light-emitting tube mounting port and a light-receiving tube mounting port. The optical fiber assembly also includes a light-emitting tube and a light-receiving tube. The light-emitting tube is snapped into the optical fiber circuit board through the light-emitting tube mounting port, and the light-receiving tube is snapped into the optical fiber circuit board through the light-receiving tube mounting port. The light-emitting tube and the light-receiving tube are also respectively provided with light plugs for fixing.

[0009] Furthermore, a mounting groove is provided on one side of the bottom of the housing body, and the second fastener is installed in the mounting groove.

[0010] Furthermore, the mounting groove is provided with a through hole, and the second fixing member is provided with a positioning post corresponding to the through hole. The positioning post passes through the through hole and abuts against the optical fiber circuit board.

[0011] Furthermore, it also includes a screen cover, and the horizontal part of the fiber optic bracket is provided with a mounting cavity, and the screen disposed on the fiber optic circuit board is located in the mounting cavity; the screen cover is snapped into the housing body and is located above the screen.

[0012] Furthermore, the optical fiber circuit board is provided with a button, and the horizontal part of the optical fiber mounting bracket is also provided with an opening, through which the button is exposed to the outside of the optical fiber mounting bracket.

[0013] Furthermore, the optical fiber assembly also includes a connector and a switch. The connector is located between the first fixing member and the inner wall of the housing body. One end of the connector is connected to the first fixing member, and the other end is connected to the switch.

[0014] Furthermore, it also includes an outer casing cover, which has a connecting portion, and the outer casing cover is connected to the housing body through the connecting portion.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The fiber optic sensor housing proposed in this invention forms a multi-point support structure through a fiber optic fixing frame and two fixing components, which stably supports and fixes the fiber optic circuit board, effectively preventing displacement and deformation of the fiber optic circuit board and improving the accuracy of photoelectric signal conversion.

[0017] Furthermore, the light-emitting tube and the light-receiving tube are connected to the fiber optic circuit board through the first fixing component, which improves the measurement reliability of the fiber optic sensor; the installation cavity and opening on the fiber optic mounting bracket enable a reasonable layout of the screen and buttons, improving the ease of operation; the screen cover effectively prevents the intrusion of external contaminants and extends the service life of the sensor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the fiber optic sensor housing in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the fiber optic sensor housing from another perspective in one embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the housing of the fiber optic sensor in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the first fixing member of the fiber optic sensor housing in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the second fixing member of the fiber optic sensor housing in one embodiment of the present invention.

[0023] Reference numerals: 1. Housing body; 2. Fiber optic bracket; 3. First fixing component; 4. Second fixing component; 5. Light-emitting tube; 6. Light-receiving tube; 7. Mounting slot; 8. Through hole; 9. Screen; 10. Screen cover; 11. Connector; 12. Power switch; 13. Button; 14. Housing cover; 15. Fiber optic circuit board. Detailed Implementation

[0024] Based on the teachings of this specification, those skilled in the art can form new technical solutions by combining different implementation methods without creating technical contradictions. Such variations should be considered to fall within the protection scope of this patent.

[0025] The following is a more detailed description of a fiber optic sensor housing according to the present invention, with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0026] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0027] like Figures 1 to 5As shown in the figure, this utility model embodiment proposes a fiber optic sensor housing, including a housing body 1, a fiber optic assembly disposed within the housing body 1, and a fiber optic circuit board 15 mounted within the housing body 1 via the fiber optic assembly. The housing body 1 can be manufactured using an integral molding process, possessing high strength and thus effectively resisting external impacts and vibrations.

[0028] The optical fiber assembly includes an optical fiber mounting bracket 2 and at least two fixing members. A first fixing member 3 is disposed at one end of the optical fiber mounting bracket 2, and a second fixing member 4 is disposed on the housing body 1. Both fixing members have positioning structures for fixing the optical fiber circuit board 15, thus jointly securing the optical fiber circuit board 15. By setting two fixing members at different positions, forming a triangular support structure with the housing body 1, the optical fiber circuit board 15 is fixed in different directions, avoiding the translational and shaking problems easily caused by simple snap-fit ​​connections, and improving the stability of the optical fiber circuit board 15.

[0029] In this embodiment, the fiber optic mounting bracket 2 has an L-shaped structure, including a vertical part and a horizontal part. The L-shaped structure can provide support in both vertical and horizontal directions simultaneously. The first fixing member 3 is connected to the vertical part and fixes the fiber optic circuit board 15 in the left-right direction.

[0030] Specifically, such as Figure 4 As shown, the first fixing member 3 includes a body and two pairs of fixing arms. The two pairs of fixing arms are disposed on one side of the body and are used to snap the fiber optic circuit board 15.

[0031] The two pairs of fixing arms are spaced apart along the length of the main body, thereby increasing the support area and effectively preventing stress concentration in the fiber optic circuit board 15 when the temperature changes. Each pair of fixing arms is symmetrically arranged about the center line of the main body, so that the fixing force is evenly distributed, avoiding local deformation, and also facilitating the accurate positioning of the fiber optic circuit board 15.

[0032] In this embodiment, the main body of the first fixing member 3 is further provided with a mounting port for a light-emitting tube 5 and a mounting port for a light-receiving tube 6. The optical fiber assembly also includes a light-emitting tube 5 and a light-receiving tube 6. The light-emitting tube 5 is snapped into the optical fiber circuit board 15 through the mounting port of the light-emitting tube 5, and the light-receiving tube 6 is snapped into the optical fiber circuit board 15 through the mounting port of the light-receiving tube 6. This allows the pins of the light-emitting tube 5 and the light-receiving tube 6 to form an elastic compression with the optical fiber circuit board 15, ensuring that the optical axis is perpendicular to the reference plane of the optical fiber circuit board 15 and eliminating the assembly stress caused by screws or welding. The light-emitting tube 5 and the light-receiving tube 6 are also respectively provided with light plugs for fixing, which can effectively block external light interference and have good sealing performance to prevent dust and moisture from entering.

[0033] In this embodiment, as Figure 2 As shown, a mounting groove 7 is provided on one side of the bottom of the housing body 1. The second fastener 4 is installed in the mounting groove 7 by snap-fit. The second fastener 4 can be made of elastic plastic material, so that the second fastener 4 can fit tightly with the mounting groove of the housing body 1 through elastic deformation during assembly, thereby achieving quick and reliable fixing.

[0034] Furthermore, the mounting groove 7 is provided with a through hole 8, and the second fixing member 4 is provided with a positioning post corresponding to the through hole 8. The positioning post passes through the through hole 8 and abuts against the fiber optic circuit board 15. By utilizing the precise fit between the positioning post and the through hole 8, the second fixing member, the housing body 1, and the fiber optic circuit board 15 are coaxially positioned, eliminating the cumulative error caused by assembly gaps. When the fiber optic circuit board 15 is subjected to external force or thermal stress, the positioning post provides a reverse support force, which, together with the first fixing member, constrains and suppresses the warping and slight displacement of the fiber optic circuit board 15, so that the light-emitting tube 5, the light-receiving tube 6, and the optical path always maintain high-precision alignment, thereby maintaining signal coupling efficiency and measurement stability over a long period of time.

[0035] In this embodiment, the fiber optic sensor housing also includes a screen cover 10. The horizontal part of the fiber optic mounting bracket 2 is provided with a mounting cavity, and the screen 9 provided on the fiber optic circuit board 15 is located in the mounting cavity. The screen cover 10 is snapped into the housing body 1 and is located above the screen 9, for displaying the screen 9 while protecting the screen 9.

[0036] Furthermore, the fiber optic circuit board 15 is provided with a button 13, and the horizontal part of the fiber optic mounting bracket 2 is also provided with an opening. The button 13 is exposed to the outside of the fiber optic mounting bracket 2 through the opening, making it convenient to use the button 13.

[0037] In this embodiment, the optical fiber assembly further includes a connector 11 and a switch 12. The connector 11 is located between the first fixing member 3 and the inner wall of the housing body 1. One end of the connector 11 is connected to the first fixing member 3, and the other end is connected to the switch 12. Through the bridging effect of the connector 11, the switch 12 is positioned in the operating area of ​​the side wall of the housing, thus improving the stability of the switch 12.

[0038] In this embodiment, the fiber optic sensor housing further includes a housing cover 14, which has a connecting portion and is connected to the housing body 1 via the connecting portion. When the housing cover 14 is closed, it is connected to the switch 12, which enables the housing cover 14 to be opened and closed.

[0039] In summary, this utility model forms a multi-point support structure through an optical fiber fixing frame and two fixing components, which stably supports and fixes the optical fiber circuit board, effectively preventing displacement and deformation of the optical fiber circuit board and improving the accuracy of photoelectric signal conversion.

[0040] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fiber optic sensor housing, characterized in that, It includes a housing body, an optical fiber assembly disposed within the housing body, and an optical fiber circuit board mounted within the housing body via the optical fiber assembly; The optical fiber assembly includes an optical fiber mounting bracket and at least two fixing components. The first fixing component is disposed at one end of the optical fiber mounting bracket, and the second fixing component is disposed on the housing body. Both fixing components are provided with positioning structures for fixing the optical fiber circuit board, which together fix the optical fiber circuit board.

2. The fiber optic sensor housing as described in claim 1, characterized in that, The fiber optic mounting bracket has an L-shaped structure, including a vertical part and a horizontal part, and the first fixing member is connected to the vertical part; The first fixing component includes a main body and two pairs of fixing arms, which are disposed on one side of the main body and are used to snap the fiber optic circuit board.

3. The fiber optic sensor housing as described in claim 2, characterized in that, The two pairs of fixed arms are spaced apart along the length of the main body, and each pair of fixed arms is symmetrical about the center line of the main body.

4. The fiber optic sensor housing as described in claim 2, characterized in that, The first fixing component is also provided with a light-emitting tube mounting port and a light-receiving tube mounting port on its main body. The optical fiber assembly also includes a light-emitting tube and a light-receiving tube. The light-emitting tube is snapped into the optical fiber circuit board through the light-emitting tube mounting port, and the light-receiving tube is snapped into the optical fiber circuit board through the light-receiving tube mounting port. The light-emitting tube and the light-receiving tube are also respectively provided with light plugs for fixing.

5. The fiber optic sensor housing as described in claim 1, characterized in that, A mounting groove is provided on one side of the bottom of the housing body, and the second fastener is installed in the mounting groove.

6. The fiber optic sensor housing as described in claim 5, characterized in that, The mounting groove has a through hole, and the second fixing member has a positioning post corresponding to the through hole. The positioning post passes through the through hole and abuts against the optical fiber circuit board.

7. The fiber optic sensor housing as described in claim 1, characterized in that, It also includes a screen cover, and the horizontal part of the fiber optic bracket is provided with a mounting cavity, and the screen set on the fiber optic circuit board is located in the mounting cavity; the screen cover is snapped into the housing body and is located above the screen.

8. The fiber optic sensor housing as described in claim 1, characterized in that, The fiber optic circuit board is equipped with a button, and the horizontal part of the fiber optic mounting bracket is also provided with an opening, through which the button is exposed to the outside of the fiber optic mounting bracket.

9. The fiber optic sensor housing as described in claim 1, characterized in that, The fiber optic assembly also includes a connector and a switch. The connector is located between the first fixing member and the inner wall of the housing body. One end of the connector is connected to the first fixing member, and the other end is connected to the switch.

10. The fiber optic sensor housing as described in claim 1, characterized in that, It also includes an outer cover, which has a connecting part, and the outer cover is connected to the housing body through the connecting part.

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