CN213635756U - Circuit board mounting structure of circuit breaker - Google Patents

Abstract

The utility model discloses a circuit board mounting structure of circuit breaker, according to support piece and spacing groove all along holding chamber length direction extension setting, make support piece keep reliable support connection with spacing groove in holding chamber length direction like this, the connection distance is long, the installation atress is stable, has strengthened the anti extrusion ability of sliding cover plate, thereby makes the reliable cover of sliding cover plate in the holding chamber top, avoids the circuit board in the holding chamber to expose outside, and the benefit of this design lies in, the support piece with the whole width of sliding cover plate is greater than the width of circuit board, and the torsion that produces when the user installs the wire on the wiring casing with the help of the screwdriver can extrude the wiring casing, the wiring casing will extrude the support piece of sliding cover plate both sides with priority with the extrusion force, thereby eliminate the stress of wiring casing inside, avoided the circuit board to receive the extrusion and damage, the safety of the product in use is improved.

Description

Circuit board mounting structure of circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to circuit board mounting structure of circuit breaker.

Background

The breaker is a current switch device used for distributing electric energy and protecting power supply lines, motors and the like in real time, and can bear, close and open current in a normal loop in due time according to the states of the circuit, such as normal, overload, short circuit, undervoltage and the like, so that the safe production is ensured.

Chinese patent document CN111128621A discloses a circuit breaker, including circuit breaker casing and total accuse casing, can dismantle on the circuit breaker casing and be connected with the annex casing, be equipped with the main line board in the total accuse casing, still include middle cover, middle cover one end with the connection can be dismantled to the annex casing, the other end with the connection can be dismantled to the circuit breaker casing, be equipped with in the circuit breaker casing with the inferior circuit board that the main line board electricity is connected, middle cover with annex casing lateral wall, circuit breaker casing outer wall form and be used for the holding tank that inferior circuit board was placed, be equipped with the groove of hanging on the annex casing, middle cover and locate hang groove joint complex couple, be equipped with the recess on the circuit breaker casing, middle cover be equipped with recess grafting cooperation or joint complex lug.

However, the following problems may occur in the actual use of such a circuit breaker:

1. when the screwdriver is used for installing the lead on the accessory shell, the accessory shell can be extruded, so that the accessory shell extrudes the circuit board, the circuit board is extruded and deformed, the circuit board cannot normally work, and potential safety hazards exist.

2. Middle cover is direct from last lock joint down between circuit breaker casing and annex casing, and the joint reliability is poor, also can drag the annex casing when installing the wire with the help of the screwdriver on the annex casing, makes the annex casing drag middle cover, easily makes middle cover with the annex casing or installation gap appears between the circuit breaker casing, and outside foreign matter or liquid drop the circuit board in from the installation gap, lead to the circuit board short circuit to burn out, and middle cover atress drag when serious, can make the lug drop from the groove or couple from hanging the groove, thereby make middle cover fall into in the holding tank with the circuit board bumps, leads to the circuit board impaired, and the earth leakage protection function of circuit breaker is inefficacy, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the circuit board of the annex casing among the prior art in the installation wire can extrude the holding tank, leads to the problem that the circuit board extrusion warp, damages even to provide an installation sliding cover board simple and convenient, stability is good, can avoid the circuit board to receive the extrusion, circuit board mounting structure of circuit breaker that the protecting effect is good.

The utility model discloses the second technical problem that solve lies in overcoming the middle cover among the prior art and receiving to drop easily when the annex casing is dragged and fall into the holding tank in and bump with the circuit board, lead to the problem that the circuit board damaged.

In order to solve the technical problem, the utility model provides a circuit board mounting structure of circuit breaker, be in including circuit breaker casing, connection the wiring casing of circuit breaker casing one end is in with the shaping circuit breaker casing with just be fit for the holding chamber of installation circuit board between the wiring casing, and cover the slip apron at holding chamber top, the slip apron is followed through bearing structure holding chamber length direction slides and pegs graft between circuit breaker casing and the wiring casing, bearing structure includes:

the limiting grooves extend along the length direction of the accommodating cavity and are formed in the side walls of the two sides of the top of the accommodating cavity respectively;

the supporting pieces extend along the length direction of the accommodating cavity and are arranged on the side edges of the two sides of the sliding cover plate respectively, the distance between the two supporting pieces is larger than the width of the circuit board, and the supporting pieces can be slidably inserted into the limiting grooves and are mutually abutted to the circuit breaker shell and the wiring shell.

In the circuit board mounting structure of the circuit breaker, one side of the limiting groove, which is communicated with the opening of the accommodating cavity, is provided with a limiting bulge; the supporting piece is a limiting claw which forms a clamping hook fit with the limiting bulge, and the limiting claw is connected in the limiting groove in a sliding mode when the sliding cover plate is inserted into one end of the accommodating cavity and forms a clamping hook fit with the limiting bulge; the side edges of the two sides of the sliding cover plate are attached to and abutted against the limiting bulges on the two sides of the accommodating cavity.

In the circuit board mounting structure of the circuit breaker, a U-shaped groove is formed between the limiting hook and the side edge of the sliding cover plate, and the limiting bulge is inserted in the U-shaped groove in a matched mode, so that the side walls of the two sides of the limiting bulge are respectively in contact with the sliding cover plate and the limiting hook in a fitting mode.

In the circuit board mounting structure of the circuit breaker, the limiting hook is formed by integrally turning and folding the bottom of the side edge of the sliding cover plate outwards, the cross section of the limiting groove is of an L-shaped structure, and the limiting hook is correspondingly provided with an L-shaped hook end.

In the circuit board mounting structure of the circuit breaker, the circuit breaker shell and the wiring shell are detachably connected through the mounting structure, the mounting structure comprises a positioning chute arranged on the bottom edge of one end of the circuit breaker shell along the length direction of the accommodating cavity and a positioning insert block correspondingly arranged on the bottom edge of one end of the wiring shell, and the positioning insert block is slidably inserted into the positioning chute.

In the circuit board mounting structure of foretell circuit breaker, mounting structure is still including setting up the latch hook spare of circuit breaker casing one end is in with corresponding the setting the locking piece of wiring casing one end, the location inserted block slides and inserts drive during the location spout the locking piece forms spacing cooperation with latch hook spare joint, and, the location inserted block slides and breaks away from drive during the location spout the locking piece separates and removes spacing cooperation with latch hook spare.

In the circuit board mounting structure of the circuit breaker, the locking block is a strip-shaped convex block arranged in parallel to the positioning chute; and one side of the locking hook piece is provided with a locking groove suitable for the locking block to be clamped in a sliding manner.

In the circuit board mounting structure of the circuit breaker, the two ends of the length of the accommodating cavity are respectively provided with an open end and a closed end, and the sliding cover plate and the circuit board are inserted into the accommodating cavity from the open end and are mutually abutted against the closed end.

In the circuit board mounting structure of the circuit breaker, the opening end is provided with a supporting platform parallel and opposite to the sliding cover plate, two lower convex blocks are arranged on two sides of the supporting platform, two upper convex blocks opposite to the two lower convex blocks are arranged at the bottom of one end of the sliding cover plate, and the sliding cover plate is inserted into the accommodating cavity, the upper convex blocks and the lower convex blocks are respectively opposite to each other and abutted against the upper side and the lower side of the circuit board.

In the circuit board mounting structure of the circuit breaker, the closed end is respectively provided with a first mounting groove and a second mounting groove which are suitable for the sliding cover plate and one end of the circuit board to be inserted.

In the circuit board mounting structure of the circuit breaker, a plurality of supporting blocks are arranged on the side walls of the two sides of the accommodating cavity at intervals along the length direction of the accommodating cavity, and the circuit board is pressed on the supporting blocks when being inserted into the accommodating cavity.

Compared with the prior art, the technical scheme of the utility model have the following advantage:

1. the utility model provides a circuit board mounting structure of circuit breaker, according to support piece and spacing groove all along holding chamber length direction extension setting, make support piece keep reliable support connection with spacing groove in holding chamber length direction like this, the connection distance is long, the installation atress is stable, has strengthened the anti extrusion ability of sliding cover plate, thereby make the reliable cover of sliding cover plate be in holding chamber top, avoid the circuit board in the holding chamber exposes outside, the benefit of this design lies in, support piece and the whole width of sliding cover plate is greater than the width of circuit board, the torsion that user produced with the help of the screwdriver installation wire on the wiring casing can extrude the wiring casing, the wiring casing can extrude the support piece of sliding cover plate both sides with the extrusion force preferentially, thereby eliminate the stress of wiring casing inside, avoided receiving the extrusion and damaging, the safety of the product in use is improved.

2. The utility model provides a circuit board mounting structure of circuit breaker, the slip apron passes through spacing hook slip colludes even in the spacing groove to form the pothook cooperation with the spacing arch of spacing groove opening one side, even slip apron is receiving the effect of dragging of wiring casing and circuit breaker casing, also can block spacing hook unhook is gone out from the spacing inslot, thereby avoids the slip apron falls into the holding intracavity with the circuit board bumps to effectively prevent that the slip apron from taking place dislocation deformation between wiring casing and circuit breaker casing, guarantee the safety and stability of circuit board in the holding intracavity, do the circuit board provides safer protection, improves the security performance of circuit breaker.

3. The circuit board mounting structure of the circuit breaker provided by the utility model, the limiting bulge is inserted in the U-shaped groove, when the wiring shell is subjected to a larger pulling force, the limiting lug is used for applying force to the limiting hook, so that the limit claw is slightly deformed to cause a gap between the limit bulge and the sliding cover plate to be generated, even if liquid flows into the gap, the liquid is blocked by the bottom of the U-shaped groove, so that the liquid cannot directly drip onto the circuit board, the burning accident caused by the short circuit of the circuit board is avoided, the limiting hook claw and the sliding cover plate are integrally injection molded, the limiting hook claw can elastically reset under the action of the toughness when the pulling force disappears, so that the limiting protrusion is tightly attached to the sliding cover plate, and external foreign matters and liquid are prevented from falling into the U-shaped groove.

4. The utility model provides a circuit board mounting structure of circuit breaker, the cross section of spacing groove is L type structure, spacing hook correspondence has L type hook end, can make L type hook end can the assorted insert in the spacing groove, guarantee the compactness and the stability that the two is connected, through spacing hook is pegged graft along holding chamber length direction in the spacing groove, compensatied slide cover plate and circuit breaker casing and the longer space that exists between the wiring casing has increased the circuit board arrives circuit breaker casing or the creepage distance of wiring casing surface avoids the circuit board takes place the problem of discharging with outside electrically conductive piece.

5. The utility model provides a circuit board mounting structure of circuit breaker, the wiring casing will location inserted block part is pegged graft in the location spout, the redrive location inserted block is followed holding chamber length direction is in slide in the location spout, make the location inserted block is complete pegged graft in the location spout, realize the circuit breaker casing with the quick location installation function of wiring casing, and location inserted block sliding insertion the in-process of location spout can drive latch hook spare and insert in the locking piece, makes the two form spacing cooperation, thereby makes wiring casing joint is fixed on the circuit breaker casing, and with the circuit breaker casing forms the holding chamber.

6. The utility model provides a circuit board mounting structure of circuit breaker, through setting up supporting platform, do the plug terminal of circuit board provides the support, recycles go up the lug with lower lug centre gripping the PCB face of circuit board avoids the circuit board rocks from top to bottom, prevent above that the component with sliding cover board bumps, improves the security when the product uses.

7. The utility model provides a circuit board mounting structure of circuit breaker works as the sliding cover board with the circuit board is followed holding chamber length direction inserts first mounting groove with during in the second mounting groove, can with the mutual butt of blind end reminds the user the sliding cover board with the circuit board is pegged graft and is targetting in place, simultaneously the second mounting groove also does the one end of circuit board provides the supporting role.

8. The utility model provides a circuit board mounting structure of circuit breaker follow on the both sides lateral wall in holding chamber length direction interval is equipped with a plurality of supporting shoes, the circuit board inserts the crimping is in during the holding chamber on the supporting shoe, avoid the unsettled setting of circuit board is in the holding intracavity increases circuit board installation stability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit board mounting structure of a circuit breaker according to the present invention;

fig. 2 is a schematic structural view of the circuit board mounting structure of the circuit breaker shown in fig. 1 after a mounting side plate is hidden;

fig. 3 is a schematic structural view of the circuit board mounting structure of the circuit breaker shown in fig. 1 after hiding the circuit board and the sliding cover plate;

FIG. 4 is an enlarged partial schematic view of the closed end of FIG. 3;

FIG. 5 is an enlarged partial view of the spacing groove shown in FIG. 2;

fig. 6 is a schematic structural view of the circuit breaker housing and the wiring housing shown in fig. 1;

FIG. 7 is a schematic view of the sliding cover shown in FIG. 1;

description of reference numerals:

1-a circuit breaker housing; 11-a wiring housing; 12-a limiting groove; 13-a limit bump;

2-an accommodating cavity; 21-a circuit board; 22-open end; 23-closed end; 24-a first mounting groove; 25-a second mounting groove; 26-a support block; 27-a support platform; 28-lower bump;

3-sliding the cover plate; 31-limiting hook claw; a 32-U-shaped groove; 33-upper bump;

4-mounting a structure; 41-positioning sliding chute; 42-positioning the insert block; 43-a latch hook member; 44-a locking block; 45-locking groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the utility model provides a circuit board 21 mounting structure of circuit breaker as shown in fig. 1-7, be in including circuit breaker casing 1, connection the wiring casing 11 of 1 one end of circuit breaker casing, with the shaping be in circuit breaker casing 1 with just be fit for the holding chamber 2 of mounting line board 21 between the wiring casing 11, and cover the sliding cover plate 3 at 2 tops in holding chamber, sliding cover plate 3 is followed through bearing structure 2 length direction in holding chamber slides and pegs graft between circuit breaker casing 1 and the wiring casing 11, bearing structure includes:

the limiting grooves 12 extend along the length direction of the accommodating cavity 2 and are formed in the side walls of the two sides of the top of the accommodating cavity 2;

support piece, follow respectively 2 length direction extensions in holding chamber are in slide cover 3's both sides side, two distance between the support piece is greater than the width of circuit board 21, but support piece slidable inserts in the spacing groove 12, with circuit breaker casing 1 and wiring casing 11 butt each other.

The above embodiment is a core technical solution of this embodiment, and both the supporting member and the limiting groove 12 are extended along the length direction of the accommodating cavity 2, so that the supporting member is reliably supported and connected with the limiting groove 12 in the length direction of the accommodating cavity 2, the connection distance is long, the installation stress is stable, and the anti-extrusion capability of the sliding cover plate 3 is enhanced, so that the sliding cover plate 3 reliably covers the top of the accommodating cavity 2, and the circuit board 21 in the accommodating cavity 2 is prevented from being exposed outside, and thus the design has the advantages that the overall width of the supporting member and the sliding cover plate 3 is greater than the width of the circuit board 21, the torsion generated when a user installs a lead on the wiring housing 11 by means of a screwdriver can extrude the wiring housing 11, the wiring housing 11 can extrude the supporting members on both sides of the sliding cover plate 3 preferentially, and thereby eliminate the stress inside the wiring housing 11, the circuit board 21 is prevented from being damaged by extrusion, and the safety of the product in use is improved.

As shown in fig. 5 and 7, a limiting protrusion 13 is arranged on one side of the limiting groove 12, which is communicated with the opening of the accommodating cavity 2; the supporting piece is a limiting claw 31 which forms a clamping hook fit with the limiting bulge 13, and the limiting claw 31 is slidably hooked in the limiting groove 12 when the sliding cover plate 3 is inserted into one end of the accommodating cavity 2 and forms a clamping hook fit with the limiting bulge 13; the both sides side of sliding cover plate 3 with the laminating of the spacing arch 13 of 2 both sides in holding chamber offsets, and sliding cover plate 3 passes through spacing hook 31 slides and colludes even in spacing groove 12 to form the pothook cooperation with the spacing arch 13 of spacing groove 12 opening one side, even sliding cover plate 3 is receiving the pulling effect of wiring casing 11 and circuit breaker casing 1, also can block spacing hook 31 unhook from spacing groove 12 and goes out, thereby avoids sliding cover plate 3 falls into in holding chamber 2 with circuit board 21 bumps to effectively prevent sliding cover plate 3 from taking place the dislocation deformation phenomenon between wiring casing 11 and circuit breaker casing 1, guarantee circuit board 21 the safety and stability in holding chamber 2, for circuit board 21 provides safer protection, improves the security performance of circuit breaker.

As a specific structure, a U-shaped groove 32 is formed between the limiting hook 31 and the side edge of the sliding cover plate 3, the limiting protrusion 13 is inserted into the U-shaped groove 32 in a matching manner, and the side walls at the two sides of the limiting protrusion are respectively attached and contacted with the sliding cover plate 3 and the limiting hook 31, when the wiring shell 11 is subjected to a large pulling force, the limiting protrusion 13 applies force to the limiting hook 31, so that the limiting hook 31 is slightly deformed, a gap is generated between the limiting protrusion 13 and the sliding cover plate 3, even if liquid flows into the gap, the liquid is blocked by the bottom of the U-shaped groove 32, the liquid cannot directly drip onto the circuit board 21, and the burning accident caused by the short circuit of the circuit board 21 is avoided, and the limiting hook 31 and the sliding cover plate 3 are integrally injection molded, and have good toughness, when the pulling force disappears, the limiting claw 31 can elastically reset under the action of the toughness thereof, so that the limiting protrusion 13 is tightly attached to the sliding cover plate 3, and external foreign matters and liquid are prevented from falling into the U-shaped groove 32.

As shown in fig. 5 and 7, the limiting hook 31 is integrally formed by folding the bottom of the side edge of the sliding cover plate 3 outwards, the limiting hook claw 31 is integrally folded and formed outwards from the bottom of the side edge of the sliding cover plate 3, the structure is simple, the manufacturing and the forming are convenient, the cross section of the limit groove 12 is of an L-shaped structure, the limit claw 31 is correspondingly provided with an L-shaped hook end, the L-shaped hook end can be inserted into the limit groove 12 in a matching way, the connection tightness and stability of the L-shaped hook end and the limit groove are ensured, through spacing hook 31 along the length direction grafting in holding chamber 2 in the spacing groove 12, compensatied the longer space that exists between slide cover plate 3 and circuit breaker casing 1 and the casing 11 of working a telephone switchboard, increased circuit board 21 to circuit breaker casing 1 or the creepage distance of the casing 11 surface of working a telephone switchboard, avoid circuit board 21 and outside electrically conductive piece take place the problem of discharging.

As a specific structure, the circuit breaker housing 1 and the wiring housing 11 are detachably connected by a mounting structure 4, the mounting structure 4 includes a positioning sliding slot 41 disposed on a bottom edge of one end of the circuit breaker housing 1 along a length direction of the accommodating cavity 2, and a positioning insertion block 42 correspondingly disposed on a bottom edge of one end of the wiring housing 11, the positioning insertion block 42 is slidably inserted into the positioning sliding slot 41, the wiring housing 11 first partially inserts the positioning insertion block 42 into the positioning sliding slot 41, and then drives the positioning insertion block 42 to slide in the positioning sliding slot 41 along the length direction of the accommodating cavity 2, so that the positioning insertion block 42 is completely inserted into the positioning sliding slot 41, thereby achieving a quick positioning and mounting function of the circuit breaker housing 1 and the wiring housing 11, and in order to prevent the positioning insertion block 42 from sliding over and separating from the positioning sliding slot 41 in the positioning sliding slot 41, mounting structure 4 is still including setting up the locking hook piece 43 of 1 one end of circuit breaker casing is in with the corresponding setting the locking piece 44 of wiring casing 11 one end, location inserted block 42 slides and inserts drive during 41 spout of location locking piece 44 forms spacing cooperation with locking hook piece 43 joint, makes wiring casing 11 with circuit breaker casing 1 keeps relative mounted position fixed, and has formed between the two holding chamber 2, and, location inserted block 42 slides and breaks away from drive during 41 spout of location locking piece 44 separates and removes spacing cooperation with locking hook piece 43, makes wiring casing 11 can follow circuit breaker casing 1 is last to be dismantled.

As shown in fig. 6, the locking block 44 is a bar-shaped projection arranged parallel to the positioning chute 41; lock hook piece 43 one side is equipped with the suitability lock groove 45 that locking block 44 slip card was gone into, and the transversal L type structure of personally submitting of this side, in this embodiment, wiring casing 11 is in 2 bottoms in holding chamber are equipped with the set-square, locking block 44 sets up on the lateral wall of set-square one end, refer to fig. 6, lock groove 45 sets up lock hook piece 43 with the relative one side that sets up of locking block 44, only works as location inserted block 42 pegs graft in location spout 41, the direction of inserting of locking block 44 just can be aimed at the opening direction of lock groove 45, consequently, location inserted block 42 is followed 2 length direction complete sliding pegs graft in holding chamber is in during location spout 41, drive lock block 44 inserts in form spacing cooperation in the lock groove 45.

As a concrete structure setting, the length both ends in holding chamber 2 are equipped with open end 22 and blind end 23 respectively, slide cover plate 3 with circuit board 21 is followed open end 22 inserts in holding chamber 2, and with blind end 23 butt each other, through circuit breaker casing 1 with the both sides of wiring casing 11 set up two installation curb plates, make one of it the installation curb plate covers completely holding chamber 2 one end is in order to form blind end 23, another the installation curb plate corresponds the open design has been made in order to form to the holding chamber 2 other end open end 22.

The opening end 22 is provided with a supporting platform 27 parallel and opposite to the sliding cover plate 3, the supporting platform 27 is arranged to support the plug-in terminal of the circuit board 21, so that the circuit board 21 keeps the center of gravity stable in the accommodating cavity 2, two lower protruding blocks 28 are arranged on two sides of the supporting platform 27, two upper protruding blocks 33 opposite to the two lower protruding blocks 28 are arranged at the bottom of one end of the sliding cover plate 3, when the sliding cover plate 3 is inserted into the accommodating cavity 2, the upper protruding blocks 33 and the lower protruding blocks 28 are respectively abutted against the upper side and the lower side of the circuit board 21, and the upper protruding blocks 33 and the lower protruding blocks 28 are utilized to prevent the circuit board 21 from shaking up and down, prevent elements on the circuit board from colliding with the sliding cover plate 3, and improve the safety of the product during use.

As shown in fig. 3 to 4, the closed end 23 is respectively provided with a first mounting groove 24 and a second mounting groove 25 suitable for inserting one end of the sliding cover plate 3 and one end of the circuit board 21, and when the sliding cover plate 3 and the circuit board 21 are inserted into the first mounting groove 24 and the second mounting groove 25 along the length direction of the accommodating cavity 2, the sliding cover plate 3 and the circuit board 21 are abutted against each other to remind a user that the sliding cover plate 3 and the circuit board 21 are inserted in place, and meanwhile, the second mounting groove 25 also provides a supporting function for one end of the circuit board 21.

As a specific structure setting, be equipped with a plurality of supporting shoes 26 along holding 2 length direction intervals in the both sides lateral wall in holding chamber 2, circuit board 21 inserts the crimping is in when holding chamber 2 on the supporting shoe 26, avoids circuit board 21 unsettled setting is in holding chamber 2, increase circuit board 21 installation stability.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (11)

1. The utility model provides a circuit board mounting structure of circuit breaker, includes circuit breaker casing (1), connects wiring casing (11) of circuit breaker casing (1) one end, and the shaping is in circuit breaker casing (1) with between wiring casing (11) and be fit for holding chamber (2) of installation circuit board (21), and cover sliding cover plate (3) at holding chamber (2) top, characterized in that sliding cover plate (3) through bearing structure along holding chamber (2) length direction slip grafting between circuit breaker casing (1) and wiring casing (11), bearing structure includes:

the limiting grooves (12) extend along the length direction of the accommodating cavity (2) and are formed in the side walls of the two sides of the top of the accommodating cavity (2) respectively;

the supporting pieces extend along the length direction of the accommodating cavity (2) and are arranged on the side edges of the two sides of the sliding cover plate (3), the distance between the supporting pieces is larger than the width of the circuit board (21), and the supporting pieces can be slidably inserted into the limiting grooves (12) and are mutually abutted to the circuit breaker shell (1) and the wiring shell (11).

2. The circuit board mounting structure of the circuit breaker according to claim 1, wherein a limiting protrusion (13) is provided at one side of the opening of the limiting groove (12) communicated with the accommodating cavity (2); the supporting piece is a limiting claw (31) which forms clamping hook fit with the limiting bulge (13), and the limiting claw (31) is slidably hooked in the limiting groove (12) when the sliding cover plate (3) is inserted into one end of the accommodating cavity (2) and forms clamping hook fit with the limiting bulge (13); the side edges of the two sides of the sliding cover plate (3) are attached to and abutted against the limiting bulges (13) on the two sides of the accommodating cavity (2).

3. The circuit board mounting structure of the circuit breaker according to claim 2, wherein a U-shaped groove (32) is formed between the limiting hook (31) and the side edge of the sliding cover plate (3), and the limiting protrusion (13) is inserted into the U-shaped groove (32) in a matching manner, so that the side walls of the two sides of the limiting protrusion are respectively attached and contacted with the sliding cover plate (3) and the limiting hook (31).

4. The circuit board mounting structure of the circuit breaker according to claim 3, wherein the limiting hook (31) is integrally formed by folding the bottom of the side edge of the sliding cover plate (3) outwards, the cross section of the limiting groove (12) is L-shaped, and the limiting hook (31) is correspondingly provided with an L-shaped hook end.

5. The circuit board mounting structure of the circuit breaker according to any one of claims 2-4, wherein the circuit breaker housing (1) is detachably connected with the wiring housing (11) through a mounting structure (4), the mounting structure (4) comprises a positioning sliding groove (41) arranged on a bottom edge of one end of the circuit breaker housing (1) along the length direction of the accommodating cavity (2) and a positioning insertion block (42) correspondingly arranged on a bottom edge of one end of the wiring housing (11), and the positioning insertion block (42) can be slidably inserted into the positioning sliding groove (41).

6. The circuit board mounting structure of the circuit breaker according to claim 5, wherein the mounting structure (4) further comprises a latch hook member (43) arranged at one end of the circuit breaker housing (1) and a locking block (44) correspondingly arranged at one end of the wiring housing (11), the positioning insertion block (42) is inserted into the positioning sliding groove (41) in a sliding manner to drive the locking block (44) to be clamped with the latch hook member (43) to form a limit fit, and the positioning insertion block (42) is separated from the positioning sliding groove (41) in a sliding manner to drive the locking block (44) to be separated from the latch hook member (43) and release the limit fit.

7. The circuit board mounting structure of a circuit breaker according to claim 6, wherein said locking piece (44) is a bar-shaped projection arranged in parallel to said positioning chute (41); and a locking groove (45) which is suitable for the locking block (44) to be clamped in a sliding manner is formed in one side of the locking hook piece (43).

8. The circuit board mounting structure of the circuit breaker according to any one of claims 1-4, wherein the length of the receiving cavity (2) is provided with an open end (22) and a closed end (23) at two ends, and the sliding cover plate (3) and the circuit board (21) are inserted into the receiving cavity (2) from the open end (22) and abut against the closed end (23).

9. The circuit board mounting structure of the circuit breaker according to claim 8, wherein a supporting platform (27) parallel to and opposite to the sliding cover plate (3) is disposed at the opening end (22), two lower protrusions (28) are disposed at two sides of the supporting platform (27), two upper protrusions (33) opposite to the two lower protrusions (28) are disposed at the bottom of one end of the sliding cover plate (3), and when the sliding cover plate (3) is inserted into the accommodating cavity (2), the upper protrusions (33) and the lower protrusions (28) are respectively abutted against the upper side and the lower side of the circuit board (21) in an opposite manner.

10. The circuit board mounting structure of circuit breaker according to claim 9, wherein said closed end (23) is provided with a first mounting groove (24) and a second mounting groove (25) adapted to the insertion of said sliding cover plate (3) and one end of said circuit board (21), respectively.

11. The circuit board mounting structure of the circuit breaker according to any one of claims 1-4, wherein a plurality of supporting blocks (26) are provided on the side walls of both sides of the accommodating chamber (2) at intervals along the length direction of the accommodating chamber (2), and the circuit board (21) is pressed against the supporting blocks (26) when inserted into the accommodating chamber (2).

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