Time relay

Abstract

The utility model discloses a time relay, which comprises a shell, and a plurality of circuit boards and wire holders arranged in the shell, and is characterized in that the shell is formed by enclosing a bottom shell, a cover plate and a surface cover, the bottom shell, the cover plate and the surface cover are detachably connected, the bottom shell is provided with an opening aligned with a wiring hole of the wire holder, the opening is detachably provided with a sealing plate, and the sealing plate is provided with a sealing groove. The plurality of circuit boards and the wire holder are arranged in the bottom shell. According to the time relay, the shell is designed into a three-section structure formed by sequentially combining the bottom shell, the cover plate and the surface cover, so that the assembly process can be carried out according to a clear sequence, the assembly and debugging of an internal structure are facilitated, the production efficiency and the assembly precision are improved, an idle opening is sealed by the sealing plate, the flexibility of product configuration is improved, and the production cost is reduced. Diversified requirements of customers are met, dust and moisture are prevented from entering from idle hole sites, and environmental adaptability and reliability of the time relay are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay technology field, concretely relates to a time relay. BACKGROUND

[0002] Time relay is a kind of commonly used electrical control element, is used to realize the function of time delay connection or disconnection in circuit.The existing time relay usually adopts split housing structure, i.e.the housing is divided into left and right or upper and lower two halves and is closed together.This structure is relatively inconvenient when assembling internal circuit board, terminal block and other components, often needs to align multiple components and is fixed simultaneously, is easy to cause misplacement or assembly not firm, affects the reliability and production efficiency of product.In addition, different application occasions can need different number of terminal blocks, and the terminal window of traditional relay is usually fixed, cannot be flexibly adjusted according to actual demand, lacks effective sealing protection for terminal hole position not needing to use, is easy to cause dust, moisture or even foreign matter to invade the inside of housing, causes short circuit, corrosion and other faults, simultaneously affects the integrity of product appearance. SUMMARY

[0003] In view of the deficiencies of the background art, the technical problem to be solved by the utility model is to provide a time relay with reasonable structure, convenient assembly and flexible adaptation to different wiring requirements.

[0004] To this end, the utility model is implemented by adopting the following technical scheme:

[0005] A time relay, comprising a housing and a plurality of circuit boards and terminal blocks arranged in the housing, characterized in that: the housing is formed by a bottom shell, a cover plate and a face cover, the bottom shell, the cover plate and the face cover are detachably connected, the bottom shell is provided with an opening aligned with a terminal hole of the terminal block, the opening is detachably provided with a sealing plate, and the plurality of circuit boards and terminal blocks are arranged in the bottom shell.

[0006] Further, the circuit board comprises a first circuit board, a second circuit board and a third circuit board, the first circuit board is provided with alignment openings on the left and right sides, the bottom shell is provided with guide rails for sliding the alignment openings, the first circuit board is laid flat in the bottom shell when the alignment openings slide into the bottom of the guide rails, the first circuit board is provided with a plurality of clamping holes in the middle and lower parts, the second circuit board is provided with a first positioning block inserted into the clamping hole in the middle of the first circuit board, the third circuit board is provided with a second positioning block inserted into the clamping hole in the lower part of the first circuit board, and the second circuit board and the third circuit board are both provided with terminal blocks.

[0007] Further, the inner bottom of the bottom shell and the guide rails are both provided with sliding grooves penetrating through the bottom shell, the sliding grooves are provided with first clamping parts, the cover plate is provided with inner buckles inserted into the sliding grooves and buckled with the first clamping parts, and the cover plate is provided with debuckling holes aligned with the buckling parts of the inner buckles.

[0008] Further, the outer edge of the face cover is provided with a plurality of alignment grooves, and the bottom shell is provided with alignment blocks inserted into the alignment grooves.

[0009] Further, the face cover is internally provided with a downwardly extending vertical lug, the vertical lug is provided with a clamping hole, the upper inner wall of the bottom shell is provided with a second clamping portion buckling with the clamping hole, and when the clamping hole buckles with the second clamping portion, the lower end of the face cover abuts against the upper end face of the bottom shell.

[0010] Further, the left and right inner walls of the opening are each provided with a slot, and the sealing plate is provided with a protruding strip inserted into the slot, and when the protruding strip of the sealing plate is completely inserted into the slot, the outer end face of the sealing plate is flush with the outer end face of the bottom shell.

[0011] Further, the face cover is provided with a plurality of grooves, the first circuit board is connected with an indicator lamp upwardly and inserted into the groove, and the face cover at the bottom of the groove forms a light-transmitting indication window.

[0012] After the above technical scheme is adopted, the shell is designed as a three-section structure combined by the bottom shell, the cover plate and the face cover in sequence, so that the assembly process can be performed in a clear order: first, all internal components are installed on the bottom shell, then the cover plate is covered, and finally, the face cover is installed, which facilitates the assembly and debugging of the internal structure, improves the production efficiency and assembly precision, meanwhile, by arranging the detachable sealing plate at the opening of the bottom shell, the corresponding opening can be flexibly opened for installation according to the actual required number of terminal blocks, and the idle opening is sealed by the sealing plate, which improves the flexibility of product configuration, meets the diversified needs of customers, avoids dust and moisture from entering from the idle hole, and enhances the environmental adaptability and reliability of the time relay. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model discloses the following drawings:

[0014] Fig. 1 It is the three-dimensional structure schematic diagram of the utility model;

[0015] Fig. 2 It is the three-dimensional structure schematic diagram of the utility model of removing cover plate and opening face cover;

[0016] Fig. 3 It is the split structure schematic diagram of the bottom shell, cover plate and multiple circuit boards in the utility model.

[0017] Reference signs: 1, terminal block; 2, bottom shell; 3, cover plate; 4, face cover; 5, opening; 6, sealing plate; 7, first circuit board; 8, second circuit board; 9, third circuit board; 10, alignment opening; 11, guide rail; 12, bayonet; 13, first positioning block; 14, second positioning block; 15, sliding slot; 16, first clamping part; 17, inner clasp; 18, release hole; 19, alignment slot; 20, alignment plug; 21, vertical lug; 22, clamping hole; 23, second clamping part; 24, insertion slot; 25, protruding strip; 26, recess; 27, indicator light. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects taken by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0019] Referring to the above-mentioned drawings Figs. 1-3The utility model provides a time relay, including shell and multiple circuit boards, wiring seat 1 set in the shell, the shell is enclosed by bottom shell 2, cover plate 3 and face cover 4, and bottom shell 2, cover plate 3 and face cover 4 are detachably connected, bottom shell 2 is equipped with the opening 5 of the wiring hole alignment wiring seat 1, and the opening 5 is detachably equipped with the closing plate 6, and multiple circuit boards, wiring seat 1 are all set in bottom shell 2, and the circuit board includes first circuit board 7, second circuit board 8 and third circuit board 9, and first circuit board 7 left and right sides are equipped with alignment opening 10, and bottom shell 2 is equipped with guide rail 11 that can slide to alignment opening 10, and when alignment opening 10 slides into the bottom of guide rail 11, first circuit board 7 is laid flat in bottom shell 2, and the middle and lower parts of first circuit board 7 are all equipped with multiple clamping holes 12, second circuit board 8 is equipped with first positioning block 13 inserted into the middle clamping hole 12 of first circuit board 7, and third circuit board 9 is equipped with second positioning block 14 inserted into the lower clamping hole 12 of first circuit board 7, and wiring seat 1 is all equipped on second circuit board 8 and third circuit board 9 (second circuit board 8 and third circuit board 9 are also equipped with relay, capacitor and other components, belong to prior art, here will not be repeated), and the inner bottom of bottom shell 2 and guide rail 11 are all equipped with sliding slot 15 that penetrates bottom shell 2, and first clamping part 16 is arranged in sliding slot 15, inner buckle 17 that can be inserted into sliding slot 15 and is buckled with first clamping part 16 is arranged on cover plate 3, and debuckling hole 18 that is aligned with the buckling part of inner buckle 17 is arranged on cover plate 3, the outer edge of face cover 4 is equipped with a plurality of alignment grooves 19, bottom shell 2 is equipped with alignment insertion block 20 inserted into alignment groove 19, downward extending stand lug 21 is arranged in face cover 4, and clamping hole 22 is arranged on stand lug 21, second clamping part 23 that is buckled with clamping hole 22 is arranged on the inner wall of the upper part of bottom shell 2, when clamping hole 22 is buckled with second clamping part 23, the lower end of face cover 4 is supported on the upper end surface of bottom shell 2, and the left and right inner walls of opening 5 are all equipped with insertion slot 24, and closing plate 6 is equipped with convex strip 25 inserted into insertion slot 24, when convex strip 25 of closing plate 6 is completely inserted into insertion slot 24, the outer end surface of closing plate 6 is flush with the outer end surface of bottom shell 2, a plurality of recesses 26 are arranged on face cover 4, indicating lamp 27 that is inserted into recess 26 and faces upwards is connected with first circuit board 7, and the face cover 4 of the bottom of recess 26 forms light transmission indicating window.

[0020] In this embodiment, the shell is designed as a three-section structure combined by the bottom shell 2, the cover plate 3 and the face cover 4 in turn, so that the assembly process can be carried out in a clear order: first, all internal components are installed in the bottom shell 2, then the cover plate 3 is covered, and finally the face cover 4 is installed, which facilitates the assembly and debugging of the internal structure, improves the production efficiency and assembly accuracy, and at the same time, by setting a detachable sealing plate 6 at the opening 5 of the bottom shell 2, the number of terminal blocks 1 can be flexibly opened according to actual needs, and the idle opening 5 is sealed with the sealing plate 6, which improves the flexibility of product configuration, meets the diversified needs of customers, and at the same time avoids dust and moisture from entering through the idle hole, enhances the environmental adaptability and reliability of the time relay;

[0021] By setting the alignment opening 10 on both sides of the first circuit board 7 and the guide rail 11 in the bottom shell 2 to slide fit, the first circuit board 7 is quickly and accurately positioned and installed, and further by using the multiple sockets 12 on the first circuit board 7 and the positioning blocks on the second and third circuit boards 9 to insert fit, a stable three-dimensional cross support structure is formed between the three circuit boards, which not only saves internal space, but also enhances the structural rigidity and anti-vibration ability of the whole assembly, preventing the circuit boards from shifting or the connection from loosening due to vibration during transportation or use;

[0022] The cover plate 3 is directly buckled and fixed with the first clamping part 16 in the bottom shell 2 through the inner buckle 17 thereon, without the need for fasteners such as screws, realizing quick and tool-free installation and disassembly of the cover plate 3. The disengaging hole 18 of the alignment inner buckle 17 buckling part provided on the cover plate 3 can be easily unlocked by inserting a thin rod into the disengaging hole 18 to press the inner buckle 17 when disassembly and maintenance are needed, which is extremely convenient. The sliding groove 15 penetrates the bottom shell 2, so that the through hole on the bottom shell 2 also has the function of the disengaging hole 18;

[0023] The alignment slot 19 on the outer edge of the face cover 4 cooperates with the alignment plug block 20 on the bottom shell 2 to accurately pre-position the face cover 4 during installation, preventing misalignment of the face cover 4 and making the subsequent buckling operation smoother and more accurate;

[0024] The face cover 4 is buckled with the second clamping part 23 of the inner wall of the upper part of the bottom shell 2 through the inner vertical ear 21 and the clamping hole 22 on the vertical ear 21, and the lower end surface of the face cover 4 tightly abuts against the upper end surface of the bottom shell 2. This structure forms a double fixing mechanism of axial (buckling force) and radial (end surface abutting), which is firm, stable and reliable, ensuring that the face cover 4 will not loosen or fall off in a vibrating environment;

[0025] The sealing plate 6 is inserted and fixed with the slot 24 of the inner wall of the opening 5 through the protrusions 25 on both sides of the sealing plate 6, and is simple and fast to install and disassemble; when the protrusions 25 are completely inserted into the slot 24, the outer end surface of the sealing plate 6 is flush with the outer end surface of the bottom shell 2, and is finally limited by the cover plate 3, thereby ensuring the integrity and aesthetic degree of the shell;

[0026] The indicating lamp 27 extends upward into the recess 26 of the face cover 4, the recess 26 plays a good protection role on the indicating lamp 27, preventing it from being accidentally hurt, at the same time, the bottom of the recess 26 naturally forms a light transmission indicating window, so that the light of the indicating lamp 27 can be concentrated and transmitted, and the indicating effect is clearer and softer.

Claims

1. A time relay comprising a housing and a plurality of circuit boards and terminal blocks disposed within the housing, characterized in that: The shell is surrounded by a bottom shell, a cover plate and a face cover, the bottom shell, the cover plate and the face cover are detachably connected, the bottom shell is provided with an opening for aligning the wiring hole of the terminal block, the opening is detachably provided with a sealing plate, a plurality of the line boards and the terminal blocks are arranged in the bottom shell.

2. A time relay according to claim 1, characterised in that: The line board includes a first line board, a second line board and a third line board, the first line board is provided with a positioning opening on the left and right sides, the bottom shell is provided with a guide rail for sliding the positioning opening, the first line board is laid flat in the bottom shell when the positioning opening slides into the bottom of the guide rail, the first line board is provided with a plurality of clamping holes in the middle and lower parts, the second line board is provided with a first positioning block inserted into the clamping hole in the middle of the first line board, the third line board is provided with a second positioning block inserted into the clamping hole in the lower part of the first line board, and the second line board and the third line board are both provided with terminal blocks.

3. A time relay according to claim 2, characterised in that: The inner bottom of the bottom shell and the guide rail are both provided with a sliding groove penetrating the bottom shell, the sliding groove is provided with a first clamping part, the cover plate is provided with an inner clamping buckle which can be inserted into the sliding groove and buckled with the first clamping part, and the cover plate is provided with an unbuckling hole for aligning the buckling part of the inner clamping buckle.

4. A time relay according to claim 3, characterised in that: The outer edge of the face cover is provided with a plurality of positioning grooves, and the bottom shell is provided with a positioning plug inserted into the positioning groove.

5. A time relay according to claim 2 or 3 or 4, characterised in that: The face cover is provided with a vertical lug extending downward, and the vertical lug is provided with a clamping hole, the inner wall of the upper part of the bottom shell is provided with a second clamping part buckled with the clamping hole, and the lower end of the face cover abuts against the upper end surface of the bottom shell when the clamping hole is buckled with the second clamping part.

6. A time relay according to claim 5, characterised in that: The left and right inner walls of the opening are both provided with an insertion slot, and the sealing plate is provided with a protrusion inserted into the insertion slot, the outer end surface of the sealing plate is flush with the outer end surface of the bottom shell after the protrusion of the sealing plate is completely inserted into the insertion slot.

7. A time relay according to claim 5, characterised in that: The face cover is provided with a plurality of recesses, the first line board is connected with an indicator lamp inserted into the recesses and facing upward, and the face cover at the bottom of the recess forms a light transmission indicating window.

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