CN112652492A - Circuit board mounting structure of circuit breaker - Google Patents

Abstract

The invention discloses a circuit board mounting structure of a circuit breaker, which is characterized in that a support piece and a limiting groove are arranged along the length direction of an accommodating cavity in an extending way, so that the support piece is reliably supported and connected with the limiting groove in the length direction of the accommodating cavity, the connection distance is long, the mounting stress is stable, the anti-extrusion capacity of a sliding cover plate is enhanced, the sliding cover plate is reliably covered on the top of the accommodating cavity, the circuit board in the accommodating cavity is prevented from being exposed outside, the design has the advantages that the integral width of the support piece and the sliding cover plate is larger than the width of the circuit board, a torsion force generated by mounting a lead on a wiring shell by a user by means of a screwdriver can extrude a wiring shell, the extruding force of the wiring shell can preferentially extrude the support piece on the two sides of the sliding cover plate, the stress in the wiring shell is eliminated, and the circuit board is, the safety of the product in use is improved.

Description

Circuit board mounting structure of circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a circuit board mounting structure of a 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.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the problem that the circuit board is extruded and deformed and even damaged due to the fact that the accessory shell extrudes the circuit board in the accommodating groove when a lead is installed in the circuit board in the prior art, so that the circuit board installation structure of the circuit breaker is simple and convenient to install, good in stability, capable of preventing the circuit board from being extruded and good in protection effect.

The second technical problem to be solved by the invention is to overcome the problem that the intermediate cover in the prior art is easy to fall off and fall into the accommodating groove to collide with the circuit board when being pulled by the accessory shell, so that the circuit board is damaged.

In order to solve the technical problem, the invention provides a circuit board mounting structure of a circuit breaker, which comprises a circuit breaker shell, a wiring shell connected to one end of the circuit breaker shell, an accommodating cavity formed between the circuit breaker shell and the wiring shell and suitable for mounting a circuit board, and a sliding cover plate covering the top of the accommodating cavity, wherein the sliding cover plate is inserted between the circuit breaker shell and the wiring shell in a sliding manner along the length direction of the accommodating cavity through a supporting structure, and the supporting structure comprises:

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 invention has the following advantages:

1. the circuit board mounting structure of the circuit breaker provided by the invention has the advantages that the whole width of the supporting piece and the sliding cover plate is larger than the width of the circuit board, the torsion generated by mounting a lead on the wiring shell by a user by means of a screwdriver can extrude the wiring shell, the extruding force of the wiring shell can preferentially extrude the supporting piece on the two sides of the sliding cover plate, so that the stress in the wiring shell is eliminated, and the circuit board is prevented from being damaged by extrusion, the safety of the product in use is improved.

2. According to the circuit board mounting structure of the circuit breaker, the sliding cover plate is connected in the limiting groove in a sliding mode through the limiting hook claw and forms a hook fit with the limiting bulge on one side of the opening of the limiting groove, even if the sliding cover plate is pulled by the wiring shell and the circuit breaker shell, the limiting hook claw can be prevented from being unhooked from the limiting groove, so that the sliding cover plate is prevented from falling into the accommodating cavity to collide with the circuit board, the phenomenon of dislocation and deformation of the sliding cover plate between the wiring shell and the circuit breaker shell is effectively prevented, the safety and stability of the circuit board in the accommodating cavity are guaranteed, safer protection is provided for the circuit board, and the safety performance of the circuit breaker is improved.

3. In the circuit board mounting structure of the circuit breaker provided by the invention, 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. According to the circuit board mounting structure of the circuit breaker, the cross section of the limiting groove is of an L-shaped structure, the limiting claw is correspondingly provided with the L-shaped hook end, the L-shaped hook end can be inserted into the limiting groove in a matched mode, the tightness and the stability of connection of the L-shaped hook end and the limiting groove are guaranteed, the limiting claw is inserted into the limiting groove along the length direction of the accommodating cavity, a long gap between the sliding cover plate and the circuit breaker shell and between the sliding cover plate and the wiring shell is made up, the creepage distance from the circuit board to the outer surface of the circuit breaker shell or the wiring shell is increased, and the problem of discharge between the circuit board and an external conductive piece is avoided.

5. According to the circuit board mounting structure of the circuit breaker, the wiring shell is firstly partially inserted into the positioning sliding groove, then the positioning inserting block is driven to slide in the positioning sliding groove along the length direction of the accommodating cavity, so that the positioning inserting block is completely inserted into the positioning sliding groove, the rapid positioning mounting function of the circuit breaker shell and the wiring shell is realized, and in the process that the positioning inserting block is slidably inserted into the positioning sliding groove, the locking hook piece is driven to be inserted into the locking block, so that the locking hook piece and the locking block form limiting fit, the wiring shell is clamped and fixed on the circuit breaker shell, and the accommodating cavity is formed between the wiring shell and the circuit breaker shell.

6. According to the circuit board mounting structure of the circuit breaker, the supporting platform is arranged to support the plug-in terminal of the circuit board, the upper convex block and the lower convex block are used for clamping the PCB surface of the circuit board, the circuit board is prevented from shaking up and down, elements on the circuit board are prevented from colliding with the sliding cover plate, and the safety of the circuit breaker in use is improved.

7. According to the circuit board mounting structure of the circuit breaker, when the sliding cover plate and the circuit board are inserted into the first mounting groove and the second mounting groove along the length direction of the accommodating cavity, the sliding cover plate and the circuit board can be abutted against the closed end to remind a user that the sliding cover plate and the circuit board are inserted in place, and meanwhile the second mounting groove also provides a supporting effect for one end of the circuit board.

8. According to the circuit board mounting structure of the circuit breaker, the 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, so that the circuit board is prevented from being arranged in the accommodating cavity in a suspended mode, and the mounting stability of the circuit board is improved.

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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art 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 solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may 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 invention provides a circuit board 21 mounting structure of a circuit breaker as shown in fig. 1-7, which comprises a circuit breaker shell 1, a wiring shell 11 connected with one end of the circuit breaker shell 1, an accommodating cavity 2 which is formed between the circuit breaker shell 1 and the wiring shell 11 and is suitable for mounting a circuit board 21, and a sliding cover plate 3 covering the top of the accommodating cavity 2, wherein the sliding cover plate 3 is inserted between the circuit breaker shell 1 and the wiring shell 11 in a sliding way along the length direction of the accommodating cavity 2 through a supporting structure, and the supporting structure comprises:

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 therefrom are within 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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