Blind plug-in combination cabinet for frequency modulation broadcast transmitter

Abstract

This invention relates to the field of wireless broadcasting equipment technology, specifically to a blind-fit assembly enclosure for an FM broadcasting transmitter, comprising an enclosure body, plug-in modules, a multi-stage guiding mechanism, and an ejection mechanism. The multi-stage guiding mechanism, through guide rails, positioning pins, guide sleeves, and floating connectors, achieves step-by-step guidance and tolerance compensation during the insertion process of the plug-in module, ensuring reliable blind fitting. In one embodiment, a wedge-shaped locking mechanism is formed by inclined guide rails and a movable slider, achieving automatic clamping and vibration-resistant locking after plug-in insertion. The ejection mechanism utilizes a push rod equipped with a drive pin and a rod head, cooperating with a linkage mechanism. During ejection, the slider is first unlocked, and then the module body is pushed, achieving a "unlock first, then eject" sequence. This application solves the problems of difficult plug-in module alignment, laborious removal, and unreliable connection, especially in protecting expensive and fragile RF connectors, significantly improving maintenance efficiency and equipment stability.

Description

Technical Field

[0001] This invention relates to the field of wireless broadcasting equipment technology, and more specifically to a blind-plug assembly enclosure for an FM broadcasting transmitter. Background Technology

[0002] FM broadcast transmitters typically include various functional modules such as exciters, switchers, and central controllers. In existing technology, these modules are generally fixed in the cabinet using cable connections or rear-mounted plug-ins. To ensure reliable connections and facilitate routine maintenance, traditional designs often require a large amount of space at the rear of the transmitter for wiring and operation.

[0003] However, with advancements in transmitter technology and increasing demands for miniaturization, the internal space design of equipment has become increasingly compact. This compact design significantly reduces the available space at the rear of the cabinet, making it difficult for operators to directly observe the connector interfaces deep within the cabinet when installing or replacing components. The lack of a visual alignment reference makes aligning components with the cabinet back panel interfaces difficult, leading to inefficient installation and increasing the risk of damaging connectors through blind trial-and-error, thus causing inconvenience for routine transmitter maintenance.

[0004] Based on the above, this application proposes a blind-fit assembly enclosure for FM broadcast transmitters, which can effectively solve the above problems. Summary of the Invention

[0005] To address the difficulty in aligning and inserting plug-in components in existing FM radio transmitters due to their compact internal space and the inability to visually inspect the connection interfaces, this application proposes a blind-fit assembly enclosure for FM radio transmitters.

[0006] A blind-fit assembly enclosure for an FM broadcast transmitter, comprising:

[0007] The housing body has at least one independent cavity defined inside, and each independent cavity is provided with a plate along its length.

[0008] Multiple plug-in modules, each of which can be plugged into and detachably disposed within a corresponding independent cavity; and

[0009] A multi-stage guiding mechanism includes a guide rail, a positioning pin, a guide sleeve that mates with the positioning pin, a fixed connector, and a floating connector that mates with the fixed connector. The guide rail is disposed on the inner wall of the independent cavity and extends along the insertion / removal direction. The insertion module can slide with the guide rail. The positioning pin and the floating connector are disposed on the plate surface of the insertion module facing the insertion plate. The guide sleeve and the fixed connector are disposed on the insertion plate. The positioning pin is configured such that during the insertion of the insertion module, its front end enters the guide sleeve before the floating connector begins to engage with the fixed connector, so as to guide the floating connector to mate with the fixed connector.

[0010] By setting up a multi-level guiding mechanism, the insertion process of the plug-in module can be guided in three levels: from "coarse positioning" to "fine positioning" and then to "connector alignment". This solves the problem that the plug-in module is difficult to align with the backplane connector under non-visual conditions and realizes blind insertion of the plug-in module.

[0011] In one embodiment, a floating connecting plate is disposed on the surface of the plug-in module facing the insert plate. The floating connecting plate includes a first floating connector, which is fixed to the floating connecting plate. A first mounting hole is provided on the floating connecting plate, and a positioning pin passes through the first mounting hole and is mounted on the floating connecting plate. The floating connecting plate is fixed to the rear panel of the plug-in module by a first fastener. The diameter of the first mounting hole is larger than the diameter of the first fastener to allow the floating connecting plate to have floating displacement. This structure enables the floating connecting plate, which is fixed with the positioning pin or the first floating connector, to have planar floating capability on the rear panel of the plug-in module, actively compensating for planar position tolerances accumulated during processing or assembly.

[0012] In one embodiment, the floating connector includes a second floating connector, which comprises a connector body and a second fastener. The connector body has an integral flange and a collar extending from the flange. The rear panel of the plug-in module has a second mounting hole through which the collar passes. The diameter of the second mounting hole is larger than the outer diameter of the collar. The second fastener mates with the flange to allow the second floating connector to float within the second mounting hole. This design provides a direct floating mounting method for connectors of specific shapes, such as circular ones, further enhancing alignment tolerance and enabling smooth engagement of connector pins.

[0013] In one embodiment, an electromagnetic thrust mechanism is further included, comprising a housing and an electromagnet, a force-amplifying structure, and a push rod integrated within the housing. The housing is disposed on the insert plate. An armature is disposed inside the electromagnet. The input end of the force-amplifying structure is connected to the armature, and the output end is connected to the push rod. The force-amplifying structure is constrained by an internal groove and a fixed force-amplifying block, configured to convert the linear motion of the armature into a push-out motion of the push rod with amplified thrust when the electromagnet is energized, thereby applying a thrust to the insert module. By setting up the electromagnetic thrust mechanism, the electromagnetic force is amplified by the linkage mechanism to generate a thrust sufficient to overcome the frictional force of the multi-connector engagement, solving the problem of difficult manual removal and realizing the automatic ejection of the insert module.

[0014] In one embodiment, the push rod includes a main shaft, a rod head, a limiting ring, a first elastic element, and a second elastic element. The main shaft is connected to the output end of the force-amplifying structure. The rod head is located at the other end of the main shaft. The first elastic element is located inside the rod head. Both the limiting ring and the second elastic element are sleeved on the outside of the main shaft, and the second elastic element connects the limiting ring and the inner wall of the housing. This configuration provides a restoring force to the push rod when the electromagnet is de-energized. This structure not only clarifies the push rod's restoring method but also, through the first elastic element, provides cushioning to the insertion module during ejection, reducing rigid impact.

[0015] In one embodiment, the guide rail disposed on one inner wall of the independent cavity is an inclined guide rail, the side of the inclined guide rail facing the plug-in module being an inwardly converging inclined surface along the insertion direction. The guide rail disposed on the other inner wall of the independent cavity is a straight guide rail, the bottom of which has a limiting through groove. This structure lays the foundation for achieving wedge-shaped clamping and locking. Through the asymmetrical guide rail design, a fixed reference surface and a movable support surface are provided for subsequent lateral locking.

[0016] In one embodiment, a slider slidable along the insertion / removal direction is further included. The slider is disposed within the straight guide rail. The side of the slider facing the insertion module has a reverse inclined surface that matches the inclined surface of the inclined guide rail. A limiting post is provided at the bottom of the slider, passing through the limiting slot. The limiting post abuts against the end of the limiting slot to limit the sliding stroke of the slider. By introducing a slidable slider, a pair of wedge-shaped surfaces are formed in cooperation with the inclined guide rail, allowing lateral clamping or loosening of the insertion module to be achieved by controlling the position of the slider along the insertion / removal direction.

[0017] In one embodiment, a locking ramp is provided on the front sidewall of the plug-in module. The inclination angle of the locking ramp is greater than that of the slider ramp. The locking ramp is configured to abut against and push the slider to move along the insertion direction to the locking position during the insertion stroke of the plug-in module into the independent cavity. This design utilizes the insertion action of the plug-in module itself to drive the slider to complete the locking. Based on the principle of frictional self-locking angle, a specific angle difference design ensures that the module will not loosen itself even if subjected to vibration after locking, thus achieving mechanical self-locking.

[0018] In one embodiment, the device further includes a push rod for applying a pushing force to the plug-in module and a linkage mechanism. The push rod includes a main shaft and a rod head. A drive pin is provided on the main shaft. The drive pin maintains a preset distance from the rod head. The drive pin is configured such that during the push rod's pushing motion, the drive pin first drives the linkage mechanism to move the slider to the unlocked position, and then the rod head contacts and pushes the plug-in module. By setting different functional driving parts, namely the drive pin and the rod head, on a single push rod and utilizing their spatial spacing, the key action sequence of "unlocking first, then pushing out" is achieved. This structure integrates the locking structure and the pushing structure into an organic whole. With a single pushing action as the driving source, it not only achieves automatic pushing out of the plug-in module but also avoids the risk of damaging the connector by forcibly pulling it out in the locked state, thus improving the automation level and long-term operational reliability of the device.

[0019] In one embodiment, the linkage mechanism is a lever pivotally mounted on the insert plate about a fixed pivot. The lever includes a first actuating arm driven by a drive pin and a second actuating arm directly connected to the slider. When the drive pin acts on the first actuating arm, the lever rotates about the fixed pivot, and the second actuating arm moves the slider to the unlocked position. This solution provides a specific implementation of the linkage mechanism, which can convert the linear push motion of the push rod into a pull-back motion that moves the slider along the unlocking direction.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By setting up a multi-level guiding mechanism including guide rails, positioning pins, guide sleeves and floating connectors, the step-by-step alignment and blind insertion of the plug-in modules are realized, solving the problem of alignment difficulties caused by the inability to see directly;

[0022] 2. By setting up a linkage mechanism that is linked with the electromagnetic thrust mechanism, the automatic ejection of the plug-in module is realized, which solves the problem of large insertion and extraction force and laborious manual extraction caused by multiple connectors, and improves the convenience of maintenance.

[0023] 3. By setting up mutually cooperating inclined guide rails, sliding sliders, and locking inclined surfaces on the plug-in module, a wedge-shaped mechanical self-locking mechanism is formed, which realizes automatic clamping and vibration-resistant locking after the plug-in module is inserted into place;

[0024] 4. By setting drive pins and rod heads with preset spacing on the push rod and cooperating with the linkage mechanism, the timing control of "unlock first, then push out" is realized with a single push-out action as the drive source. This not only realizes the automatic push-out of the plug-in module, but also avoids the risk of damaging the equipment or connector by forcibly pulling it out in the locked state, thus improving the level of automation and the safety of maintenance operations. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment 1 of a blind-fit combination enclosure for an FM broadcast transmitter provided in this application.

[0026] Figure 2 This is a schematic diagram of the main body of the enclosure in Embodiment 1 of a blind-insertion combination enclosure for an FM broadcast transmitter provided in this application.

[0027] Figure 3 This is a schematic diagram of the insert plate in Embodiment 1 of a blind-insertion combination box for an FM broadcast transmitter provided in this application.

[0028] Figure 4 This is a schematic diagram of the plug-in module in Embodiment 1 of a blind-plug combination box for an FM broadcast transmitter provided in this application.

[0029] Figure 5 This is a schematic diagram of the floating connecting plate in Embodiment 1 of a blind-fitting combination enclosure for an FM broadcast transmitter provided in this application.

[0030] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0031] Figure 7 This is a schematic diagram of the structure of the first floating connector in Embodiment 1 of a blind-fit assembly housing for an FM broadcast transmitter provided in this application.

[0032] Figure 8 This is a schematic diagram of the electromagnetic thrust mechanism in the unlocked state in Embodiment 1 of a blind-plug combination enclosure for an FM broadcast transmitter provided in this application.

[0033] Figure 9 This is a schematic diagram of the electromagnetic thrust mechanism in the locked state in Embodiment 1 of a blind-plug combination enclosure for an FM broadcast transmitter provided in this application.

[0034] Figure 10This is a schematic diagram of the linkage mechanism in Embodiment 2 of a blind-insertion combination box for an FM broadcast transmitter provided in this application.

[0035] Figure 11 This is a schematic diagram of the linkage mechanism in the locked state in Embodiment 2 of a blind-insertion combination box for an FM broadcast transmitter provided in this application.

[0036] Figure 12 This is a schematic diagram of the linkage mechanism in the unlocked state in Embodiment 2 of a blind-insertion combination enclosure for an FM broadcast transmitter provided in this application.

[0037] Figure 13 This is a schematic diagram of the locking ramp in Embodiment 2 of a blind-fit assembly enclosure for an FM broadcast transmitter provided in this application.

[0038] Figure 14 This is a schematic diagram of the slider and flat guide rail in Embodiment 2 of a blind-fitting combination box for an FM broadcast transmitter provided in this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Cabinet body; 11. Independent cavity; 12. Insert plate; 121. Support column; 122. Fixing component; 123. Adjustment hole; 13. Back plate; 14. Bottom plate; 15. Side plate; 16. Partition plate; 17. Cable routing cavity; 2. Insert module; 21. Floating connecting plate; 211. First mounting hole; 22. Rear panel; 221. Second mounting hole; 23. Fixing plate; 24. Handle; 25. Locking bevel; 3. Multi-stage guide mechanism; 31. Guide rail; 311. Beveled guide rail; 312. Straight guide rail; 3121. Limiting through groove; 32. Positioning pin; 33. Guide sleeve; 34. Fixed connector; 35. Floating connector; 351. First floating connector; 352. Second floating connector; 3521 Connector body; 3522 Flange; 3523 Collar; 3524 Second fastener; 4 First fastener; 5 Electromagnetic thrust mechanism; 51 Housing; 511 Through hole; 52 Electromagnet; 521 Armature; 53 Force amplification structure; 531 Input end; 532 Output end; 533 Sliding groove; 534 Bracket; 535 Force amplification block; 54 Push rod; 541 Main shaft; 5411 Drive pin; 542 Rod head; 543 Limiting ring; 544 First elastic element; 545 Second elastic element; 6 Slider; 61 Limiting post; 7 Linkage mechanism; 71 Toggle lever; 711 First acting arm; 712 Second acting arm; 72 Fixed pivot. Detailed Implementation

[0041] This application provides a blind-fit assembly enclosure for an FM broadcast transmitter, as detailed below. Figure 1-14This application will be described in further detail.

[0042] Example 1

[0043] Reference Figure 1-9 This embodiment provides a blind-fit assembly enclosure for an FM broadcast transmitter, comprising an enclosure body 1, multiple plug-in modules 2, and a multi-stage guiding mechanism 3. In this application, "blind-fit" refers to the process of aligning and inserting the plug-in module 2 with its corresponding connector inside the enclosure body 1, without the operator being able to visually observe the connector at the rear of the plug-in module 2. "Multi-stage guiding" refers to the process of gradually reducing the deviation range of the plug-in module 2's position and orientation during insertion through guiding structures of different precision levels, ultimately achieving accurate connector mating.

[0044] In this embodiment, the housing body 1 is a frame structure that carries all functional components. The housing body 1 includes a back plate 13, a bottom plate 14, and multiple independent cavities 11 enclosed by side plates 15 and partitions 16. To enhance air convection inside the housing, multiple ventilation holes are provided on the side plates 15 to assist in heat dissipation of the plug-in modules 2. The back plate 13 is vertically disposed at the rear of the housing body 1. The bottom plate 14 is horizontally disposed, and its upper surface is connected to the bottom edge of the back plate 13 and the bottom edge of the side plates 15 to form a stable base. Inside the housing body 1, one or more vertical partitions 16 can be provided as needed. These partitions 16, together with the side plates 15, divide the interior of the housing body 1 into multiple independent cavities 11 for accommodating the plug-in modules 2. Each independent cavity 11 has a guide rail 31 on its inner sidewall for guiding the plug-in modules 2.

[0045] In this embodiment, the plug-in module 2 is a functionally independent, pluggable unit. In an application scenario of an FM broadcast transmitter, these plug-in modules 2 can be exciter plug-ins, switcher plug-ins, or central controller plug-ins. Each plug-in module 2 is encapsulated in a metal housing, with a rear panel 22 at its rear, on which a floating connector 35 for electrical connection is mounted.

[0046] In this embodiment, the housing body 1 also includes one or more insert plates 12, which are arranged parallel to the back plate 13 and define a wiring cavity 17 between themselves and the back plate 13. A fixed connector 34, which mates with the floating connector 35 on the plug-in module 2, is mounted on the insert plate 12. To ensure the stability of the insert plate 12 under insertion and extraction forces, the insert plate 12 is connected to the back plate 13 by multiple rigid supports 121, which are disposed within the wiring cavity 17. Simultaneously, the bottom of the insert plate 12 is fixed to the base plate 14 of the housing body 1 by a fastener 122. To facilitate initial position calibration, an adjustment hole 123 is provided at the bottom of the insert plate 12, allowing the insert plate 12 to be adjustablely fixed to the base plate 14 via the fastener 122. During the initial testing, after all plug-in modules 2 are aligned and successfully inserted into the connectors on the plug-in plate 12, the fixing member 122 is finally locked to determine the position of the plug-in plate 12 for subsequent operation. In this embodiment, the fixing member 122 is preferably a screw, and the adjusting hole 123 is preferably an oblong hole.

[0047] In this embodiment, the multi-stage guide mechanism 3 ensures that the plug-in module 2 can be accurately inserted into the predetermined position and complete the electrical connection even when it is not visible. The multi-stage guide mechanism 3 specifically includes:

[0048] First-stage guidance: Guide rails 31 are provided on the inner wall of each independent cavity 11, extending along the insertion / removal direction of the plug-in module 2. The two side walls of the plug-in module 2 can mate with the guide rails 31, allowing it to slide along them. In this embodiment, the total clearance between the guide rails 31 and the plug-in module 2 is preferably designed to be 2mm. When the front end of the plug-in module 2 is pushed into the independent cavity 11, the guide rails 31 first initially restrict and guide its position, completing a rough alignment.

[0049] Second-stage guidance: One or more positioning pins 32 are provided on the rear panel 22 of the plug-in module 2. Correspondingly, a guide sleeve 33 that mates with the positioning pin 32 is provided on the insert plate 12. The length of the positioning pin 32 is designed to be longer than the engagement length of the floating connector 35. Therefore, during the final stroke of the plug-in module 2 insertion, the tip of the positioning pin 32 will enter the guide sleeve 33 before the floating connector 35 begins to engage with the fixed connector 34. The tight fit between the positioning pin 32 and the guide sleeve 33 further corrects the position and orientation of the plug-in module 2, completing precise alignment.

[0050] Third-level guidance: To compensate for the final residual minor positional tolerances accumulated from machining and assembly, both the floating connector 35 and the locating pin 32 can achieve floating fine-tuning within a certain floating range. In this embodiment, the floating connector 35 includes a first floating connector 351 and a second floating connector 352, corresponding to two forms: one circular and one non-circular. For the non-circular first floating connector 351, a floating connecting plate 21 is provided on the rear panel 22 of the plug-in module 2. The floating connecting plate 21 has a first mounting hole 211. The floating connecting plate 21 is installed on the rear panel 22 of the plug-in module 2 through the first mounting hole 211 by a first fastener 4. The diameter of the first mounting hole 211 on the floating connecting plate 21 is designed to be larger than the rod diameter of the first fastener 4. The first floating connector 351 is then fixedly installed on the floating connecting plate 21. In this embodiment, the first fastener 4 is preferably a stepped screw, and the diameter of the first mounting hole 211 is preferably set to be 1mm larger than the rod diameter of the first fastener 4. Therefore, when the plug-in module 2 is inserted into place and the first floating connector 351 mates with the fixed connector 34 on the plug-in plate 12, the entire floating connection plate 21 can make a slight planar floating displacement on the rear panel 22 to achieve the alignment of all connector pins.

[0051] The circular second floating connector 352 includes a connector body 3521 and a second fastener 3524. The connector body 3521 has an integrally formed radially extending flange 3522 and a collar portion 3523 extending from the flange 3522. A second mounting hole 221 is formed on the rear panel 22 of the plug-in module 2 for the collar portion 3523 to pass through. In this embodiment, the diameter of the second mounting hole 221 is 1 mm larger than the outer diameter of the collar portion 3523. The second fastener 3524 cooperates with the collar portion 3523 to constrain the connector body 3521 on the rear panel 22, allowing the connector body 3521 to float within the second mounting hole 221. In this embodiment, the second fastener 3524 is preferably a retaining ring.

[0052] Furthermore, to ensure reliable reset after floating, an elastic washer is provided between the first fastener 4 and the floating connecting plate 21, configured to hold the floating connecting plate 21 in a preset central position when no external force is applied. Similarly, a similar elastic washer can be provided between the flange 3522 and the rear panel 22 for the second floating connector 352.

[0053] In this embodiment, an electromagnetic thrust mechanism 5 is also provided, including a housing 51, and an electromagnet 52, a force amplification structure 53, and a push rod 54 housed inside the housing 51. The housing 51 is mounted on the insert plate 12, and a through hole 511 is formed on the plate surface of the housing 51 facing the independent cavity 11. When the armature 521 inside the electromagnet 52 is energized, it will generate an attraction action, and the force of this action is amplified by the force amplification structure 53.

[0054] Specifically, the force-amplifying structure 53 includes an input end 531 and an output end 532, which are pivotally connected. The input end 531 is connected to the armature 521, and the output end 532 is connected to the push rod 54. To provide stable motion constraints, a bracket 534 is fixedly installed inside the housing 51, and a force-amplifying block 535, serving as a fixed fulcrum, is fixed to the top of the bracket 534. Correspondingly, a sliding groove 533 is formed along the length of the rod of the output end 532. During the movement of the mechanism, the output end 532 slides and swings along the fixed force-amplifying block 535 through the sliding groove 533. When the electromagnet 52 is energized and the armature 521 pulls the input end 531, the intermediate hinge point between the input end 531 and the output end 532 moves. Because the output end 532 is constrained by the fixed force amplification block 535, it can only swing around the force amplification block 535 as a fulcrum, thereby converting the pulling force of the armature 521 into a pushing force on its end push rod 54. This structure amplifies the force through a combination of levers and linkages.

[0055] Specifically, in a conventional FM broadcast transmitter, a plug-in module 2 typically integrates multiple different types of connectors, namely RF connectors, power connectors, and signal connectors. When these connectors are fully engaged, the total separation force accumulated by all their contacts—that is, the sum of the static friction forces that need to be overcome—typically reaches 70 to 100 Newtons. To ensure effective separation under any operating condition, the design goal of this mechanism is to provide an instantaneous thrust of 110 Newtons to overcome this static friction force and provide sufficient safety margin. In this embodiment, the electromagnet 52 is preferably a miniature pull-type linear electromagnet with a rated tensile force of 25 Newtons. Under the action of this electromagnet 52, by optimizing the geometric configuration of the force-amplifying structure mechanism 53, adjusting the position of the force-amplifying block 535, and adjusting the length ratio of the input end 531 to the output end 532 to 1:1.5, an output thrust of approximately 125 Newtons can be applied to the push rod 54 at the output end 532, which is sufficient to overcome the static friction force between the floating connector 35 and the fixed connector 34, thus achieving separation between the two.

[0056] Specifically, to eliminate concerns about electromagnetic interference to the sensitive radio frequency circuits inside the transmitter during the moment of electromagnet 52's operation, in this embodiment, the housing 51 is preferably made of aluminum alloy with good electromagnetic shielding performance, which essentially confines the electromagnetic field generated by the electromagnet 52 during operation within its interior. Furthermore, the electromagnetic thrust mechanism 5 is only powered on for a very short moment during maintenance and when the plug-in module 2 is being pushed out; this operation time is less than 1 second. During normal broadcast operation of the transmitter, the electromagnetic thrust mechanism 5 is in a completely de-energized and static state.

[0057] Specifically, the push rod 54 consists of a main shaft 541 and a rod head 542. One end of the main shaft 541 is connected to the output end 532 of the force-amplifying structure 53, and the other end is connected to the rod head 542, which faces the rear panel 22 of the plug-in module 2. A limiting ring 543 and a second elastic element 545 are sleeved on the outside of the main shaft 541. In this embodiment, the second elastic element 545 is preferably a compression spring. One end of the compression spring abuts against the inner front wall of the housing 51 facing the plug-in module 2, and the other end abuts against the limiting ring 543, thereby always providing the push rod 54 with a restoring force pointing inward to the housing 51. When the electromagnet 52 is de-energized and the attraction of the armature 521 disappears, this restoring force will push the push rod 54, the force-amplifying structure 53, and the armature 521 back to the initial stationary position. In addition, a first elastic element 544 is provided inside the rod head 542 of the push rod 54. In this embodiment, the first elastic element 544 is preferably a miniature disc spring, which provides buffering at the moment the rod head 542 contacts the plug-in module 2 to reduce rigid impact.

[0058] In this embodiment, a fixing plate 23 is provided on the side wall of the plug-in module 2 opposite to the insert plate 12, and handles 24 for easy gripping are fixed at both ends of the fixing plate 23 along its length. When the plug-in module 2 is pushed out and unlocked by the electromagnetic thrust mechanism 5, the operator can easily pull it completely out of the independent cavity 11 through the two handles 24.

[0059] The working principle of the blind-plug combination box for an FM broadcast transmitter provided in this embodiment is as follows:

[0060] During insertion, the operator aligns the front end of the plug-in module 2 with the corresponding independent cavity 11 and pushes it in the insertion / removal direction. First, the plug-in module 2 enters the guide rail 31, completing coarse alignment. At the end of the insertion stroke, the positioning pin 32 at the rear of the plug-in module 2 enters the guide sleeve 33 on the mating plate 12 before the connector, completing fine alignment. Finally, under the final push applied by the operator, the floating connector 35 on the plug-in module 2 engages with the fixed connector 34 on the mating plate 12. The floating mechanism compensates for the final minor error, completing the electrical connection.

[0061] During the ejection process, the central controller issues an ejection command, energizing the electromagnet 52 on the electromagnetic thrust mechanism 5. The armature 521 is attracted, and its movement is amplified by the force-amplifying structure 53, driving the push rod 54 to extend. The rod head 542 of the push rod 54 pushes the rear panel 22 of the plug-in module 2 with sufficient thrust, causing the floating connector 35 on the plug-in module 2 to separate from the fixed connector 34. After power is cut off, the second elastic element 545 resets the push rod 54. The operator then completely removes the separated plug-in module 2 from the housing 1.

[0062] Example 2

[0063] Reference Figure 10-14 This embodiment provides another blind-fit assembly enclosure for FM broadcast transmitters. The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that, based on Embodiment 1, this embodiment optimizes and integrates the locking function of the guide rail 31 and the control timing of the electromagnetic thrust mechanism 5.

[0064] In this embodiment, the guide rail 31 on one inner wall of the independent cavity 11 is preferably designed as a sloping guide rail 311. The side of the sloping guide rail 311 facing the insertion module 2 is machined into a small sloping surface that gradually converges inward along the insertion direction, i.e., towards the centerline of the insertion module 2. The angle between the sloping surface and the insertion / removal direction is set between 0.5 degrees and 2 degrees, and in this embodiment, it is preferably designed as 1 degree. The guide rail 31 on the other inner wall of the independent cavity 11 is preferably designed as a straight guide rail 312. A slider 6 is installed in the straight guide rail 312, and the slider 6 can slide along the insertion / removal direction.

[0065] Specifically, the side of the slider 6 facing the plug-in module 2 is machined into a pressure-applying slope. A limiting groove 3121 is formed at the bottom of the flat guide rail 312, and a limiting post 61 passing through this limiting groove 3121 is provided at the bottom of the slider 6. The limiting post 61 abuts against the front and rear ends of the limiting groove 3121, thereby limiting the sliding stroke of the slider 6 to a preset range. In this embodiment, this preset range is preferably designed to be 5 to 10 millimeters. The two endpoints of the limiting groove 3121 define the locked and unlocked positions of the slider 6, corresponding to the endpoint closest to the plug-in plate 12 and the endpoint furthest from the plug-in plate 12, respectively.

[0066] In this embodiment, a locking ramp 25 is provided on the side wall of the plug-in module 2 corresponding to the slider 6, at the end facing the insert plate 12. During the final stroke of the plug-in module 2 during insertion, the locking ramp 25 can contact the front end of the reverse ramp of the slider 6 and push the slider 6 to move synchronously along the insertion direction of the plug-in module 2 until the slider 6 reaches its innermost locking position. When the slider 6 moves forward under the push of the locking ramp 25, the pressure ramp of the slider 6 squeezes the side wall of the plug-in module 2, forcing the plug-in module 2 to be pushed to the opposite side and pressed tightly against the ramp guide rail 311. This is a wedge-shaped force-increasing structure, that is, the small displacement of the slider 6 along the insertion and extraction direction is converted into a large radial clamping force perpendicular to the insertion and extraction direction. When slider 6 is locked, the radial clamping force causes the side wall of plug module 2 to form a large-area tight fit with guide rail 31, which enhances vibration resistance and heat conduction. When slider 6 is unlocked, the pressure disappears, plug module 2 returns to a loose fit, which is convenient for plugging and unplugging, and also provides a gap for air convection through the vent holes on side plate 15, further enhancing heat dissipation.

[0067] Furthermore, the inclination angle of the locking ramp 25 is designed to be greater than the inclination angle of the reverse ramp of the slider 6. After the insertion module 2 fully pushes the slider 6 into place and completes the locking, a small gap or only slight contact will form between the locking ramp 25 and the front end of the slider 6, and no longer transmit a large thrust between them. This ensures that, in the long-term locked state, all radial locking forces are maintained by the wedge structure between the slider 6 and the fixed inclined rail, avoiding continuous high-stress contact between the locking ramp 25 on the insertion module 2 and the slider 6, thereby reducing the long-term wear and fatigue risk of critical working surfaces and improving the durability of the mechanism.

[0068] In this embodiment, a linkage mechanism 7 is also included, which includes a lever 71. In this embodiment, a radially extending drive pin 5411 is provided on the main shaft 541 at a certain distance from the lever head 542. The drive pin 5411 and the lever head 542 maintain a preset distance in the axial direction of the main shaft 541. This preset distance is designed to be greater than the stroke of the push rod 54 required for the unlocking action, so as to ensure that the slider 6 has been fully moved to the unlocking position before the lever head 542 contacts the plug-in module 2 during the push-out movement of the push rod 54.

[0069] Specifically, the linkage mechanism 7 is responsible for directly transmitting the action of the push rod 54 to the slider 6. In this embodiment, the lever 71 is preferably an L-shaped rod, which is pivotally mounted on the insert plate 12 via a fixed pivot 72. The lever 71 includes a first actuating arm 711 driven by a drive pin 5411, and a second actuating arm 712 directly used to push the slider 6. When the push rod 54 begins to extend, the drive pin 5411 on it contacts and pushes the first actuating arm 711 of the lever 71, causing the lever 71 to rotate around the fixed pivot 72. The second actuating arm 712 of the lever 71 then directly abuts against the end of the slider 6 away from the insert plate 12, pushing the slider 6 towards the unlocked position, i.e., away from the insert plate 12.

[0070] The working principle of the blind-plug combination box for an FM broadcast transmitter provided in this application embodiment is as follows:

[0071] During insertion, the operator pushes the plug-in module 2 into the independent cavity 11. At this time, the slider 6 is in its outermost unlocked position, and there is sufficient clearance between the plug-in module 2 and the guide rails 31 on both sides, resulting in very little friction and a smooth insertion process. The linkage mechanism 7 is in a stationary state.

[0072] As the plug-in module 2 is about to be fully inserted, the locking ramp 25 on its front sidewall begins to contact and abut against the front end of the slider 6. As the plug-in module 2 is further pushed in, the locking ramp 25 pushes the slider 6 to move along the insertion direction.

[0073] When the floating connector 35 of the rear panel 22 of the plug-in module 2 is fully engaged with the fixed connector 34 on the insert plate 12, the locking ramp 25 of the plug-in module 2 also pushes the slider 6 to its innermost locking position. At this time, due to the wedge effect generated by the combined action of the ramp guide rail 311 and the pressure ramp of the slider 6 on the plug-in module 2, the slider 6 applies a continuous lateral clamping force to the plug-in module 2, pressing the plug-in module 2 tightly against the ramp guide rail 311 on the other side. The plug-in module 2 is securely locked.

[0074] During the extension process, the central controller issues an extension command, and the electromagnet 52 drives the push rod 54 to extend. The drive pin 5411 on the push rod 54 immediately contacts and pushes the first actuating arm 711 of the lever 71 in the linkage mechanism 7. The lever 71 rotates around the pivot 72, and its second actuating arm 712 directly pushes the slider 6, which is in the locked position, in the extension direction. When the push rod 54 reaches the preset unlocking stroke, the slider 6 is completely pushed back to its outermost unlocking position, and the lateral clamping force applied to the plug-in module 2 disappears instantly. At this stage, due to the existence of the preset gap, the rod head 542 of the push rod 54 has not yet contacted the plug-in module 2.

[0075] After push rod 54 has passed its unlocking stroke, it continues to extend forward. At this point, drive pin 5411 and lever 71 are misaligned, and linkage mechanism 7 ceases to operate. The tip 542 of push rod 54 then contacts the rear panel 22 of plug-in module 2. The continuous pushing force of tip 542 smoothly pushes the already relaxed plug-in module 2 outward along guide rail 31 a distance, completely separating it from the backplate connector.

[0076] After the ejection process is completed, the power source is de-energized, and the push rod 54 returns to its original position under the action of the internal reset spring. The linkage mechanism 7 and the slider 6 remain in the unlocked position, waiting for the insertion of the next plug-in module 2.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A blind plug-in combination enclosure for a frequency modulation broadcast transmitter, characterized by, include: A housing body (1) has at least one independent cavity (11) defined inside the housing body (1), and an insert plate (12) is provided inside the housing body (1), the insert plate (12) being located at the end of at least one of the independent cavities (11); Multiple plug-in modules (2), each of which is pluggable into and detachable within a corresponding independent cavity (11); and A multi-stage guiding mechanism (3) includes a guide rail (31), a positioning pin (32), a guide sleeve (33) that cooperates with the positioning pin (32), a fixed connector (34), and a floating connector (35) that cooperates with the fixed connector (34). The guide rail (31) is disposed on the inner wall of the independent cavity (11) and extends along the insertion direction. The plug-in module (2) can slide with the guide rail (31). The positioning pin (32) and the floating connector (35) are disposed on the plate surface of the plug-in module (2) facing the insert plate (12). The guide sleeve... (33) and fixed connector (34) are disposed on the insert plate (12), wherein the length of the positioning pin (32) extending from the plate surface of the insert module (2) along the insertion direction is greater than the length of the engagement end of the floating connector (35) extending from the plate surface of the insert module (2), so that during the insertion of the insert module (2), the front end of the positioning pin (32) enters the guide sleeve (33) before the floating connector (35) and the fixed connector (34) begin to engage, so as to guide the floating connector (35) and the fixed connector (34) to engage and cooperate.

2. The blind-plug assembly enclosure for an FM broadcast transmitter according to claim 1, characterized in that, The plug-in module (2) has a floating connecting plate (21) on its surface facing the plug plate (12). The floating connector (35) includes a first floating connector (351), which is fixed to the floating connecting plate (21). The floating connecting plate (21) has a first mounting hole (211). The positioning pin (32) passes through the first mounting hole (211) and is mounted on the floating connecting plate (21). The floating connecting plate (21) is fixed to the rear panel (22) of the plug-in module (2) by a first fastener (4). The diameter of the first mounting hole (211) is larger than the diameter of the first fastener (4) to allow the floating connecting plate (21) to have floating displacement.

3. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 1, characterized in that, The floating connector (35) includes a second floating connector (352), which includes a connector body (3521) and a second fastener (3524). The connector body (3521) has an integral flange (3522) and a collar portion (3523) extending from the flange (3522). The rear panel (22) of the plug-in module (2) has a second mounting hole (221) for the collar portion (3523) to pass through. The diameter of the second mounting hole (221) is larger than the outer diameter of the collar portion (3523). The second fastener (3524) cooperates with the flange (3522) to allow the second floating connector (352) to float and move within the second mounting hole (221).

4. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 1, characterized in that, It also includes an electromagnetic thrust mechanism (5), which includes a housing (51) and an electromagnet (52), a force-amplifying structure (53), and a push rod (54) integrated inside the housing (51). The housing (51) is mounted on the insert plate (12). An armature (521) is disposed inside the electromagnet (52). The force-amplifying structure (53) includes an input end (531) and an output end (532). The input end (531) is hinged to the middle of the output end (532), and the other end of the input end (531) is hinged to the armature (521). The output end (532) is hinged to the armature (521). The end of the electromagnet (532) is connected to the push rod (54). A bracket (534) is fixed inside the housing (51). A fixed force-amplifying block (535) is provided on the bracket (534). A sliding groove (533) is provided on the output end (532). The sliding groove (533) is slidably engaged with the fixed force-amplifying block (535). The force-amplifying structure (53) is configured such that when the electromagnet (52) is energized, the linear motion of the armature (521) is converted into the pushing motion of the push rod (54) through the sliding engagement of the fixed force-amplifying block (535) and the sliding groove (533).

5. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 4, characterized in that, The push rod (54) includes a main shaft (541), a rod head (542), a limiting ring (543), a first elastic element (544), and a second elastic element (545). The main shaft (541) is connected to the output end (532) of the force-enhancing structure (53). The rod head (542) is disposed at the other end of the main shaft (541). The first elastic element (544) is disposed inside the rod head (542). The limiting ring (543) and the second elastic element (545) are both sleeved on the outside of the main shaft (541). One end of the second elastic element (545) abuts against the inner front wall of the housing (51) facing the plug-in module (2), and the other end abuts against the limiting ring (543) to provide a resetting force pointing in the retraction direction to the push rod (54) when the electromagnet (52) is de-energized.

6. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 1, characterized in that, The guide rail (31) provided on one inner wall of the independent cavity (11) is an inclined guide rail (311). The side of the inclined guide rail (311) facing the plug-in module (2) is an inclined surface that converges inward along the insertion direction. The guide rail (31) provided on the other inner wall of the independent cavity (11) is a straight guide rail (312). A limiting through groove (3121) is opened at the bottom of the straight guide rail (312).

7. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 6, characterized in that, It also includes a slider (6) that can slide along the insertion direction. The slider (6) is disposed in the flat guide rail (312). The side of the slider (6) facing the plug-in module (2) is a pressure slope. The pressure slope and the slope of the slope guide rail (311) together form a wedge structure for applying lateral clamping force to the plug-in module (2). The bottom of the slider (6) is provided with a limit post (61). The limit post (61) passes through the limit through groove (3121). The end of the limit post (61) abuts against the limit through groove (3121) to limit the sliding stroke of the slider (6).

8. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 7, characterized in that, The plug-in module (2) has a locking ramp (25) on its side wall corresponding to the slider (6) and at one end facing the insert plate (12). The inclination angle of the locking ramp (25) is greater than the inclination angle of the slider (6). The locking ramp (25) is configured to abut against and push the slider (6) to move to the locking position along the insertion direction during the insertion of the plug-in module (2) into the independent cavity (11).

9. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 8, characterized in that, It also includes a push rod (54) for applying a pushing force to the plug module (2) and a linkage mechanism (7). The push rod (54) includes a main shaft (541) and a rod head (542). A drive pin (5411) is provided on the main shaft (541). The drive pin (5411) and the rod head (542) maintain a preset distance, and the preset distance is greater than the stroke required for the slider (6) to move from the locked position to the unlocked position. The drive pin (5411) is configured such that during the pushing movement of the push rod (54), the drive pin (5411) first drives the linkage mechanism (7) to move the slider (6) to the unlocked position, and then the rod head (542) contacts and pushes the plug module (2).

10. A blind-plug assembly enclosure for an FM broadcast transmitter according to claim 9, characterized in that, The linkage mechanism (7) is a lever (71). The lever (71) is pivotally mounted on the insert plate (12) about a fixed pivot (72). The lever (71) includes a first action arm (711) driven by the drive pin (5411) and a second action arm (712) directly connected to the slider (6). When the drive pin (5411) acts on the first action arm (711), the lever (71) rotates about the fixed pivot (72), and the second action arm (712) drives the slider (6) to move to the unlock position.

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