Relay structure

Abstract

The utility model provides a relay structure, which relates to the technical field of relays and comprises a relay shell, a first wiring driving unit, a second wiring driving unit and a binding post switching unit. The middle part of the relay shell is provided with an axially penetrating avoiding neutral gear; two radial sides of the relay shell are respectively provided with a first mounting cavity and a second mounting cavity; a communication mounting cavity for communicating the first mounting cavity with the second mounting cavity is formed in the relay shell; the first wiring driving unit is mounted at the first mounting cavity; the second wiring driving unit is installed at the second installation cavity, the binding post switching unit is arranged at the communication installation cavity, and the two ends of the binding post switching unit are connected with the first wiring driving unit and the second wiring driving unit respectively. The relay has the advantages that the receding neutral gear is arranged on the relay shell, so that the built-in mechanism can be hidden in the receding neutral gear, additional space does not need to be increased in an original device, and meanwhile production materials and production cost of the device can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay structure. Background Art

[0002] The current built-in relay structure is to increase the internal space of the shell on the basis of the original structure, thereby providing installation space for the relay structure, thereby enabling the relay structure to be built-in.

[0003] However, directly increasing the internal space of the shell will increase the overall size of the entire device, which is quite different from the original size of the device, making it inconvenient to install and affecting the overall aesthetics. At the same time, the increase in material consumption leads to increased costs. Utility Model Content

[0004] The technical problem to be solved by the present invention is that existing built-in relays increase the existing installation space, making the original structure too long and too large, inconvenient to install, and increasing costs. To overcome the above shortcomings of the existing technology, the present invention provides a device that facilitates installation with the built-in mechanism by avoiding a gap, so that one end of the built-in mechanism is hidden within the relay housing. After the relay housing is installed, it does not affect the internal space structure, saving production materials and production costs of the device. Moreover, it can maintain the same axial length as the original structure, making installation convenient without affecting the overall aesthetics.

[0005] For the purpose of this utility model, the following technical solutions are adopted:

[0006] A relay structure includes a relay housing, a first wiring drive unit, a second wiring drive unit, and a terminal switching unit; the relay housing is provided with an axially extending relief gap in the middle; a first mounting cavity and a second mounting cavity are provided in the relay housing on radially opposite sides of the relief gap; a connecting mounting cavity for connecting the first mounting cavity and the second mounting cavity is further provided in the relay housing on one side of the relief gap; the first wiring drive unit is mounted in the first mounting cavity; the second wiring drive unit is mounted in the second mounting cavity; the terminal switching unit is disposed in the connecting mounting cavity; the two ends of the terminal switching unit are respectively connected to the first wiring drive unit and the second wiring drive unit, and switching between the first and second wiring drive units is achieved through the terminal switching unit. The relief gap provided in the relay housing facilitates the installation and mating of an internal mechanism, allowing the internal mechanism to be hidden within the relief gap, eliminating the need to add axial space to the original device, thereby saving axial installation space and simultaneously saving production materials and production costs of the device.

[0007] Preferably, the avoidance gap includes an avoidance groove and an avoidance hole; the avoidance groove is provided in the middle of the relay body and is axially recessed; the avoidance hole axially penetrates the relay body and is connected to the bottom of the avoidance groove. The avoidance groove facilitates positioning of the built-in mechanism, while the avoidance hole facilitates extending one end of the built-in mechanism to engage with other structures.

[0008] Preferably, the terminal switching unit includes a first terminal, a second terminal, an upper contact plate, and a lower contact plate; a connecting mounting cavity is provided on the upper side of the avoidance gap; the first terminal and the second terminal are aligned left and right on the top of the relay housing, and the upper contact plate and the lower contact plate are vertically spaced apart in the connecting mounting cavity; the lower end of the first terminal extends into the connecting mounting cavity and is fixedly connected to the upper contact plate, and the upper contact plate is provided with a terminal avoidance portion for the second terminal to pass through; the lower end of the second terminal extends into the relay housing and passes through the terminal avoidance portion and is fixedly connected to the lower contact plate. By aligning the upper and lower contact plates and the structure of the terminal avoidance portion, the distance in the front-to-back direction between the two contact plates that were originally misaligned can be shortened, reducing the occupied space, making the structure more compact and reasonable, and saving the cost of the relay housing.

[0009] Preferably, the terminal avoidance portion is a terminal avoidance through-hole, and the terminal avoidance through-hole extends to one side of the upper contact plate so that a terminal avoidance opening is formed on the side wall of the upper contact plate. The terminal avoidance through-hole facilitates matching with the terminal, while the terminal avoidance opening facilitates assembly.

[0010] Preferably, the upper contact plate is provided with a widened contact plate portion located at the terminal clearance to ensure electrical signal transmission. The widened contact plate portion is disposed on the outer wall of the upper contact plate opposite the terminal clearance opening and projects horizontally along the outer wall of the upper contact plate. The design of the terminal clearance also increases the width of the upper contact plate through the widened contact plate portion, thereby ensuring stable electrical signal transmission, resolving the problem of unstable electrical signal transmission caused by overload, and ensuring normal and stable operation of the relay.

[0011] Preferably, the first wiring drive unit and the second wiring drive unit both include a fixing frame, an electromagnet, a lifting contact block, and a driving terminal; the electromagnet is fixed in the mounting cavity by the fixing frame, the lifting contact block is connected to the iron core in the electromagnet, and a vertically distributed first spring is provided between the lifting contact block and the electromagnet, and a vertically distributed second spring is provided between the lifting contact block and the top inner wall of the relay housing; the driving terminal is fixed to the relay housing, and the lower end of the driving terminal extends into the relay housing and is connected to a U-shaped contact plate; one end of the lifting contact block is connected to the two side plates of the U-shaped contact plate, and the other end of the lifting contact block is connected to the upper contact plate and the lower contact plate. The lifting contact block on the iron core is driven to move up and down by energizing the electromagnet, thereby realizing the movement between the lifting contact block and the U-shaped contact plate, realizing back and forth switching, and thus realizing the reversal of the winch.

[0012] Preferably, the distance between the two drive terminals is less than the distance between the two iron cores. By tilting the lifting contact block and the horizontal terminal switching unit to form a certain angle, both drive terminals are retracted inward, thereby shortening the radial distance between the two drive terminals, reducing occupied space, and making the structure more compact and reasonable.

[0013] Preferably, the relay housing includes an upper housing and a lower housing, wherein the upper housing is horizontal, and the bottom surfaces on the left and right sides of the upper housing are provided with upper avoidance spaces opening downward; the bottom surface of the middle portion of the upper housing is provided with an upper connecting space communicating with the upper avoidance spaces on both sides; the lower housing is U-shaped with an opening downward; the top surfaces on the left and right sides of the lower housing are provided with lower avoidance spaces opening upward, and the top surface of the middle portion of the lower housing is provided with a lower connecting space communicating with the lower avoidance spaces on both sides; the upper housing and the lower housing are installed together so that the upper avoidance space and the lower avoidance space are combined to form the first installation cavity and the second installation cavity, and the upper connecting space and the lower connecting space are combined to form the connecting installation cavity. The structure of the relay housing being assembled into two upper and lower housings facilitates the disassembly, assembly, and maintenance of the first wiring drive unit, the second wiring drive unit, and the terminal switching unit inside. At the same time, the U-shaped opening also provides an installation space, which facilitates installation with other components, saves installation space, further shortens the length in the front-to-back direction, and makes the volume more compact and beautiful.

[0014] Preferably, a mounting hole for installation is provided on the bottom of the avoidance groove, so as to facilitate assembly with other parts.

[0015] In summary, the advantage of the present invention is that the structure sets a clearance gap on the relay housing, which can facilitate the installation and coordination of the built-in mechanism, so that the built-in mechanism can be hidden in the clearance gap, without adding axial space in the original device, thereby achieving the purpose of saving axial installation space, and at the same time saving the production materials and production costs of the device. By aligning the upper contact plate and the lower contact plate and the structure of the terminal avoidance portion, the distance between the two contact plates originally staggered in the front and back can be shortened, reducing the space occupied in the front and back direction, making the structure more compact and reasonable, saving the cost of the relay housing, and while designing the terminal avoidance portion, the width of the upper contact plate is also increased by the contact plate widening portion, thereby ensuring the stable transmission of the electrical signal, solving the problem of overload and instability in the transmission of the electrical signal, and ensuring the normal and stable operation of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the relay structure of the present utility model.

[0017] Figure 2 It is an overall cross-sectional view of the relay structure of the present utility model.

[0018] Figure 3 It is a cross-sectional view of the wiring drive unit of the present utility model.

[0019] Figure 4 It is an exploded view of the relay structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the internal structure of the relay of the present invention.

[0021] Description of reference numerals:

[0022] 31. Relay housing; 301. Upper housing; 302. Lower housing; 303. Upper avoidance space; 304. Upper connecting space; 305. Lower avoidance space; 306. Lower connecting space; 310. Avoidance groove; 3101. Mounting hole; 311. Avoidance hole; 312. First mounting cavity; 313. Second mounting cavity; 314. Connecting mounting cavity; 32. First wiring drive unit; 321. Fixing frame; 322. Electromagnet; 3221. Iron core; 323. Lifting contact block; 324. Driving terminal; 325. First spring; 326. Second spring; 328. U-shaped contact plate; 33. Second wiring drive unit; 34. Terminal switching unit; 341. First terminal; 342. Second terminal; 343. Upper contact plate; 344. Lower contact plate; 346. Contact plate widening portion; 347. Terminal avoidance opening. DETAILED DESCRIPTION

[0023] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This embodiment is applied in a winch. The built-in mechanism mentioned in this embodiment is the motor reversing structure in the winch. However, the relay structure of this application is not only applied in the winch, but can also be used in other built-in devices.

[0028] like Figures 1 to 5As shown, a relay structure includes a relay housing 31, a first wiring drive unit 32, a second wiring drive unit 33 and a terminal switching unit 34; an axially extending (front-to-back) avoidance gap is provided in the middle of the relay housing 31; a first mounting cavity 312 and a second mounting cavity 313 are respectively provided in the relay housing 31 and on both radial sides (left and right sides) of the avoidance gap; a connecting mounting cavity 314 for connecting the first mounting cavity 312 and the second mounting cavity 313 is further provided in the relay housing 31 and on one side of the avoidance gap; the first wiring drive unit 32 is installed in the first mounting cavity 312; the second wiring drive unit 33 is installed in the second mounting cavity 313, and the terminal switching unit 34 is provided in the connecting mounting cavity 314, with both ends of the terminal switching unit 34 connected to the first wiring drive unit 32 and the second wiring drive unit 33 respectively, and switching back and forth between the first wiring drive unit 32 and the second wiring drive unit 33 is achieved through the terminal switching unit 34. This structure provides an avoidance gap on the relay housing 31, which can facilitate the installation and coordination of the motor reversing structure, so that the motor reversing structure can be hidden in the avoidance gap. There is no need to increase axial space in the original device, thereby achieving the purpose of saving axial installation space and saving production materials and production costs of the device.

[0029] like Figure 1 As shown, the avoidance gap includes an avoidance groove 310 and an avoidance hole 311; the avoidance groove 310 is set in the middle of the relay housing 31 and is axially recessed; the bottom of the avoidance groove 310 is provided with mounting holes 3101 on both the left and right sides. The mounting holes 3101 facilitate assembly with other parts. The avoidance hole 311 axially penetrates the relay housing 31 and is connected to the bottom of the avoidance groove 310. The avoidance groove 310 facilitates the positioning of the motor commutation structure, and the avoidance hole 311 facilitates the extension of one end of the motor commutation structure to mate with other structures.

[0030] like Figures 2 to 4As shown, the terminal switching unit 34 includes a first terminal 341, a second terminal 342, an upper contact plate 343 and a lower contact plate 344; the first terminal 341 and the second terminal 342 are aligned left and right and are arranged on the top of the relay housing 31; the upper contact plate 343 and the lower contact plate 344 are vertically spaced apart in the relay housing 31; the lower end of the first terminal 341 extends vertically into the relay housing 31 and is fixedly connected to the upper contact plate 343, and the upper contact plate 343 is provided with a terminal avoidance portion for the second terminal 342 to pass through; the lower end of the second terminal 342 extends vertically into the relay housing 31, and passes through the terminal avoidance portion and is fixedly connected to the lower contact plate 344; the upper contact plate 343 is also provided with a contact plate widening portion 346 located at the terminal avoidance portion to ensure the transmission of electrical signals. By aligning the upper contact plate 343 and the lower contact plate 344 and the structure of the terminal avoidance portion, the distance between the two contact plates that were originally offset front to back can be shortened, the space occupied in the front to back direction can be reduced, the structure can be made more compact and reasonable, and the cost of the relay housing 31 can be saved. In addition, while designing the terminal avoidance portion, the width of the upper contact plate 343 is also increased through the contact plate widening portion 346, thereby ensuring the stable transmission of electrical signals, solving the problem of overload and instability in electrical signal transmission, and ensuring the normal and stable operation of the relay.

[0031] like Figures 2 to 5 As shown, the terminal avoidance portion is a terminal avoidance through-hole, and the terminal avoidance through-hole extends to one side of the upper contact plate 343, forming a terminal avoidance opening 347 on the side wall of the upper contact plate 343. The terminal avoidance through-hole facilitates mating with the terminal, while the terminal avoidance opening 347 facilitates assembly. The contact plate widening portion 346 is provided on the outer wall of the upper contact plate 343, opposite the terminal avoidance opening 347, and the contact plate widening portion 346 protrudes horizontally along the outer wall of the upper contact plate 343. The terminal avoidance through-hole facilitates mating with the terminal, while the terminal avoidance opening 347 facilitates assembly. The horizontal protrusion of the contact plate widening portion 346 creates a widened portion, ensuring normal and stable operation of the relay.

[0032] like Figures 1 to 5As shown, the first wiring drive unit 32 and the second wiring drive unit 33 are symmetrically arranged, and the first wiring drive unit 32 and the second wiring drive unit 33 each include a fixing frame 321, an electromagnet 322, a lifting contact block 323 and a driving terminal 324; the electromagnet 322 is fixed in the installation cavity by the fixing frame 321, the lifting contact block 323 is lifted and connected to the iron core 3221 in the electromagnet 322, and a vertically distributed first spring 325 is provided between the lifting contact block 323 and the electromagnet 322, and a vertically distributed second spring 326 is provided between the lifting contact block 323 and the top inner wall of the relay housing 31; the driving terminal 3 24 is fixed to the top of the relay housing 31, and the lower end of the driving terminal 324 extends into the relay housing 31 and is connected to the U-shaped contact plate 328; one end of the lifting contact block 323 is lifted and connected between the two side plates of the U-shaped contact plate 328, and the first spring 325 and the second spring 326 ensure that the lifting contact block 323 on the iron core 3221 returns to the lowest position at the beginning when power is not supplied, ensuring that the lifting contact block 323 contacts the lower side of the U-shaped contact plate 328 and the lower contact plate 344. When power is supplied, the lifting contact block 323 is lifted up to contact the upper side of the U-shaped contact plate 328 and the upper contact plate 343. The other end of the lifting contact block 323 is connected between the upper contact plate 343 and the lower contact plate 344, and the distance between the two drive terminals 324 is smaller than the distance between the two iron cores 3221. This causes the lifting contact block 323 to be tilted at a certain angle with the horizontally arranged terminal switching unit 34, causing both drive terminals 324 to retract inward, thereby shortening the radial distance between the two drive terminals 324, reducing occupied space, making the structure more compact and reasonable, and eliminating the need to increase the space of the housing, thus saving costs. By energizing the electromagnet 322, the lifting contact block 323 on the iron core 3221 is driven to move up and down, causing the lifting contact block 323 to move back and forth between the two side plates of the U-shaped contact plate 328 and between the upper contact plate 343 and the lower contact plate 344, achieving back and forth switching, thereby realizing the connection conversion of the relay.

[0033] like Figures 1 to 5As shown, the relay housing 31 includes an upper housing 301 and a lower housing 302. The upper housing 301 is horizontal, and the left and right bottom surfaces of the upper housing 301 are provided with upper avoidance spaces 303 opening downward; the middle bottom surface of the upper housing 301 is provided with an upper connecting space 304 connecting with the upper avoidance spaces 303 on both sides; the lower housing 302 is U-shaped with an opening downward; the left and right top surfaces of the lower housing 302 are provided with lower avoidance spaces 305 opening upward, and the middle top surface of the lower housing 302 is provided with a lower connecting space 306 connecting with the lower avoidance spaces 305 on both sides; the upper housing 301 and the lower housing 302 are installed together so that the upper avoidance space 303 and the lower avoidance space 305 form a first installation cavity 312 and a second installation cavity 313, and the upper connecting space 304 and the lower connecting space 306 form a connecting installation cavity 314. The relay housing 31 is assembled into two upper and lower housings, which facilitates the disassembly, assembly and maintenance of the first wiring drive unit 32, the second wiring drive unit 33 and the terminal switching unit 34 inside. At the same time, the U-shaped design also provides installation space, which can facilitate installation with other components, save installation space, further shorten the length in the front-to-back direction, and make the volume more compact and beautiful.

[0034] In summary, the advantage of the present invention is that the structure sets a clearance gap on the relay housing 31, which can facilitate the installation and matching of the motor reversing structure, so that the motor reversing structure can be hidden in the clearance gap, without adding axial space in the original device, achieving the purpose of saving axial installation space, and at the same time saving the production materials and production costs of the device. By aligning the upper contact plate 343 and the lower contact plate 344 and the structure of the terminal avoidance portion, the front-to-back distance between the two contact plates originally misaligned can be shortened, reducing the occupied space, making the structure more compact and reasonable, saving the cost of the relay housing 31, and while designing the terminal avoidance portion, the width of the upper contact plate 343 is increased by the contact plate widening portion 346, thereby ensuring the stable transmission of electrical signals, solving the problem of overload and instability in electrical signal transmission, and ensuring the normal and stable operation of the relay.

[0035] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0036] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0037] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A relay structure, characterized in that: The invention comprises a relay housing (31), a first wiring drive unit (32), a second wiring drive unit (33) and a terminal switching unit (34); an axially penetrating avoidance gap is provided in the middle of the relay housing (31); a first mounting cavity (312) and a second mounting cavity (313) are respectively provided in the relay housing (31) and on both radial sides of the avoidance gap; a connecting mounting cavity (312) for connecting the first mounting cavity (312) and the second mounting cavity (313) is further provided in the relay housing (31) and on one side of the avoidance gap. 14); the first wiring drive unit (32) is installed at the first installation cavity (312); the second wiring drive unit (33) is installed at the second installation cavity (313); the terminal switching unit (34) is arranged at the connecting installation cavity (314); two ends of the terminal switching unit (34) are respectively connected to the first wiring drive unit (32) and the second wiring drive unit (33); and switching back and forth between the first wiring drive unit (32) and the second wiring drive unit (33) is achieved through the terminal switching unit (34).

2. The relay structure according to claim 1, characterized in that: The avoidance neutral position comprises an avoidance groove (310) and an avoidance hole (311); the avoidance groove (310) is arranged in the middle of the relay housing (31), and the avoidance groove (310) is axially recessed; the avoidance hole (311) axially penetrates the relay housing (31), and the avoidance hole (311) is in communication with the bottom of the avoidance groove (310).

3. The relay structure according to claim 1, wherein: The terminal switching unit (34) includes a first terminal (341), a second terminal (342), an upper contact plate (343) and a lower contact plate (344); the connecting mounting cavity (314) is arranged on the upper side of the avoidance neutral position; the first terminal (341) and the second terminal (342) are arranged on the top of the relay housing (31) in a left-right aligned manner, and the upper contact plate (343) and the lower contact plate (344) are vertically spaced and distributed in the connecting mounting cavity (314); the lower end of the first terminal (341) extends into the connecting mounting cavity (314) and is fixedly connected to the upper contact plate (343); the upper contact plate (343) is provided with a terminal avoidance portion for the second terminal (342) to pass through; the lower end of the second terminal (342) extends into the relay housing (31) and passes through the terminal avoidance portion to be fixedly connected to the lower contact plate (344).

4. The relay structure according to claim 3, characterized in that: The terminal avoidance portion is a terminal avoidance through hole, and the terminal avoidance through hole extends to one side of the upper contact plate (343) so that a terminal avoidance opening (347) is formed on the side wall of the upper contact plate (343).

5. The relay structure according to claim 4, characterized in that: A contact plate widening portion (346) is provided on the upper contact plate (343) at the terminal avoidance portion for ensuring transmission of electrical signals; the contact plate widening portion (346) is provided on the outer wall of the upper contact plate (343) on the opposite side of the terminal avoidance opening (347), and the contact plate widening portion (346) protrudes horizontally along the outer wall of the upper contact plate (343).

6. The relay structure according to claim 3, characterized in that: The first wiring drive unit (32) and the second wiring drive unit (33) both comprise a fixing frame (321), an electromagnet (322), a lifting contact block (323) and a driving terminal (324); the electromagnet (322) is fixed in the installation cavity via the fixing frame (321); the lifting contact block (323) is lifted and connected to the iron core (3221) in the electromagnet (322); a vertically distributed first spring (325) is provided between the lifting contact block (323) and the electromagnet (322); the lifting contact block (323) is lifted and connected to the iron core (3221) in the electromagnet (322); and the lifting contact block (323) is lifted and connected to the iron core (3221) in the electromagnet (322). A second spring (326) is vertically arranged between the upper and lower contact plates (343 and 344) and the top inner wall of the relay housing (31); the driving terminal (324) is fixed to the relay housing (31), and the lower end of the driving terminal (324) extends into the relay housing (31) and is connected to a U-shaped contact plate (328); one end of the lifting contact block (323) is lifted and connected between two side plates of the U-shaped contact plate (328), and the other end of the lifting contact block (323) is lifted and connected between the upper contact plate (343) and the lower contact plate (344).

7. The relay structure according to claim 6, characterized in that: The distance between the driving terminals (324) on both sides is smaller than the distance between the iron cores (3221) on both sides.

8. The relay structure according to claim 1, characterized in that: The relay housing (31) comprises an upper housing (301) and a lower housing (302); the upper housing (301) is horizontal; the left and right bottom surfaces of the upper housing (301) are provided with upper avoidance spaces (303) opening downwards; the middle bottom surface of the upper housing (301) is provided with an upper communication space (304) communicating with the upper avoidance spaces (303) on both sides; the lower housing (302) is U-shaped with an opening downwards; the left and right top surfaces of the lower housing (302) are provided with upper openings. The lower avoidance space (305) is provided on the top surface of the middle portion of the lower shell (302) with a lower communicating space (306) communicating with the lower avoidance spaces (305) on both sides; the upper shell (301) and the lower shell (302) are installed together so that the upper avoidance space (303) and the lower avoidance space (305) are combined to form the first installation cavity (312) and the second installation cavity (313), and the upper communicating space (304) and the lower communicating space (306) are combined to form the communicating installation cavity (314).

9. The relay structure according to claim 2, characterized in that: The bottom of the avoidance groove (310) is also provided with a mounting hole (3101) for mounting.

Images