Anti-hand-hitting test button device in circuit breaker

Abstract

The utility model relates to an anti-hand-beating test button device in a circuit breaker, which comprises a shell, a test button, a switch handle and a circuit board, a driving lever shaft and a driving lever are arranged in the shell, the driving lever shaft and the shell are relatively fixed, the driving lever comprises an inserting part, a limiting part and a pressing part, the limiting part and the pressing part respectively extend out of the two sides of the inserting part, and the limiting part and the pressing part are arranged in the shell. The limiting part and the pressing part rotate around the shifting rod shaft, after the test button is pressed down, the switch handle is reset, the test button extrudes the pressing part, the shifting rod rotates around the shifting rod shaft, and the limiting part rotates into the open groove and makes contact with and extrudes the limiting wall. By adopting the above technical scheme, the deflector rod which can be pressed to rotate is arranged below the test button, after the test button is pressed, the deflector rod is extruded by the test button to rotate around the deflector rod shaft, the limiting part rotates into the open slot, when the leakage protection function of the circuit breaker is normal, the switch handle rebounds and resets, the limiting wall contacts with the limiting part, and the leakage protection function of the circuit breaker is normal. And the switch handle cannot directly rebound to the bottom.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, especially relates to a prevent hitting hand test button device in circuit breaker. BACKGROUND

[0002] Circuit breaker is indispensable safety device in power system, and is very important to maintain people's daily life, and test button device plays a key role in existing residual current circuit breaker, and is used for regularly detecting whether residual current protection function of circuit breaker is normal.

[0003] However, in some compact circuit breakers, the layout of the test button device has certain limitations, the test button is close to the handle position, which may cause the handle to rebound and hit the hand when pressing the test button to detect the residual current protection function, thereby causing the operator to be injured, disgusted, or causing equipment failure; if the size of the handle is changed, the test button is dislocated on the original assembly position, which will cause product appearance defects, so a test button device is needed, which prevents the handle from hitting the hand when performing normal functions, does not change the size of the handle to affect the appearance of the product, and does not change the original assembly area. SUMMARY

[0004] The utility model discloses a prevent hitting hand test button device in circuit breaker, which solves the problem of handle rebounding and hitting the hand when pressing the test button to detect the residual current protection function.

[0005] The utility model discloses a prevent hitting hand test button device in circuit breaker, which solves the problem of handle rebounding and hitting the hand when pressing the test button to detect the residual current protection function.

[0006] The technical scheme is adopted, the pressing rotating lever is arranged below the test button, after the test button is pressed, the lever rotates around the lever shaft under the extrusion of the test button, the limiting part rotates into the open slot, when the leakage protection function of the circuit breaker is normal, the switch handle is reset, at this time, the limiting wall contacts the limiting part, the switch handle cannot directly reset to the bottom, after the test button is slowly released, the limiting wall extrudes the limiting part to rotate, and the pressing part is pressed against the test button, the switch handle is slowly reset, until the limiting part rotates to be unable to contact the limiting wall, the switch handle is completely reset, at this time, the test button is also completely reset, and the reset speed of the switch handle in the whole process depends on the speed of the hand releasing the test button, so that the situation that the switch handle is immediately reset to knock the finger after the test button is pressed is avoided.

[0007] Further settings of the utility model are as follows: the shell further comprises a partition plate and a spring fixing piece arranged on the left shell and the right shell respectively, the partition plate is used for arranging a second torsional spring and a lever on both sides respectively, a gap is formed between the partition plate and the spring fixing piece, the lever shaft passes through the gap and is fixed on the left shell and the spring fixing piece at both ends, and the lever is in the gap.

[0008] The lever is supported by the partition plate and the spring fixing piece and can move flexibly in the gap, the movement range of the lever is limited, the width of the lever and the open slot can be ensured to be in the same plane interval, and the lever does not need to be pressed on the surface of the partition plate or the spring fixing piece, so that the frictional resistance of the lever during rotation is reduced.

[0009] Further settings of the utility model are as follows: the left shell is provided with a fixed boss, a fixed groove is arranged in the fixed boss, an avoiding through hole is arranged on the partition plate, a positioning hole groove is arranged on the spring fixing piece, and one end of the lever shaft is inserted into the fixed groove and the other end is inserted into the positioning hole groove through the avoiding through hole.

[0010] The two ends of the lever shaft are inserted into the left shell and the spring fixing piece and fixed, and the two ends are not directly pressed on the left shell and the right shell, so that the lever shaft is easy to install and will not shake with the loosening of the right shell.

[0011] The utility model discloses further provide: the test button includes one body formula connection's extrusion end and hand press end, the extrusion end and hand press end are respectively at the both sides of baffle, the extrusion end is above the pressing portion, the hand press end is through the opening of left shell and stretches out the shell, be provided with the conducting ring and test piece on the left shell, the test piece is below the hand press end, the conducting ring and test piece are connected through the wire and circuit board respectively, the bottom of the shell is provided with the pressing recess in the hand press end, the second torsional spring includes the spring ring of setting on the mounting convex post of left shell, second extension arm and the first extension arm in the pressing recess, after the test button is pressed, the first extension arm contacts test piece, the second extension arm contacts the conducting ring, and the test loop in the circuit board is conducted.

[0012] Adopt the further setting, the extrusion end and hand press end are respectively at the both sides of baffle, can make full use of the space in the shell, make the structure more compact, through the second torsional spring as a part of conducting circuit, reset test button while, after pressing, can connect test loop to detect the leakage protection function, simple and compact structure, small space occupation, cost is lower, and the conducting circuit including the second torsional spring under the hand press end is limited by baffle and left shell, avoid short circuit caused by contacting the rest components.

[0013] The utility model discloses further provide: the test piece is fixed by left shell and baffle, the left shell and baffle are respectively protruded by left positioning platform and right positioning platform, the test piece includes the wiring end and the bending end of setting of bending with wiring end, the bending end end face sets up towards the upper, the both sides of wiring end are opened with rectangular notch, two rectangular notches are respectively with left positioning platform, right positioning platform interlock.

[0014] Adopt the further setting, the test piece as a part of conducting circuit, can be heated and expanded when the current is too big to come circuit, prevent electric equipment from being damaged, the rectangular notch of wiring end can be clamped on left shell and baffle, and the connection is stable, and the bending end end face sets up towards the upper, can provide the second torsional spring with larger contact surface, avoid the situation that the extension arm of second torsional spring is inclined and cannot contact the bending end.

[0015] The utility model discloses further provide: the conducting ring is fixed by left shell and baffle, the positioning column for conducting ring setting is protruded on the left shell, the outer end surface of positioning column is on baffle.

[0016] Adopt the further setting, after the conducting ring is set on the positioning column, the baffle of outside loading can press on the outer end surface of positioning column, and the conducting ring is limited, prevents the conducting ring from falling off.

[0017] The utility model discloses further provide: the lever, baffle and spring fixing piece are all made of insulating material.

[0018] Further arranged as above, the internal circuit of the isolation circuit breaker is isolated, and the leakage and short circuit caused by the internal structure is prevented.

[0019] Further arranged as above, the switch handle comprises a control part and a body, a spring fixing groove for placing the first torsional spring is formed on the body, a positioning groove is formed on the side of the spring fixing groove, an installation through hole is arranged through the spring fixing groove, a handle mounting column is arranged on the left shell and can pass through the installation through hole, and the two extension arms of the first torsional spring are respectively arranged in the positioning groove and extend out of the switch handle to the spring fixing part.

[0020] Further arranged as above, the control part is convenient for people to control and drive the body to rotate, the installation through hole on the body is used for the handle mounting column to pass through, thereby realizing the relative rotation between the body and the shell, and the first torsional spring arranged on the body has one end of the extension arm extending into the spring fixing part, when the body drives the first torsional spring to rotate, the extension arm extending into the spring fixing part is relatively fixed at this time, and the first torsional spring stores energy at this time, and can provide power for the switch handle to reset after being disconnected.

[0021] Further arranged as above, the body is in a circular structure, the open groove is in a circular arc structure, the open groove is arranged on the outer side wall of the body, and the limiting wall comprises the end face of the open groove close to the rod and the outer side edge thereof.

[0022] Further arranged as above, when the rod is arranged in the open groove, the end face of the open groove close to the rod and the side edge thereof can contact the rod to block the rotation of the body, until the contact position of the rod and the body is moved to the outside of the open groove to contact the outer wall of the body, at this time, the switch handle is reset to the position, the body is in a circular structure, the distance between the outer surface of the body and the rod is the same except the open groove after resetting, and there is no blocking at this time, and the closing is not blocked by the rod. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model;

[0024] Figure 2 It is a partial sectional view of the embodiment of the utility model;

[0025] Figure 3 It is an assembly diagram of the first torsional spring in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the overall structure of the test button in the embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of the overall structure of the rod in the embodiment of the utility model;

[0028] Figure 6 It is the whole structure schematic view of the switch handle in the embodiment of the utility model;

[0029] Figure 7 It is the partial schematic view of the circuit breaker open state in the embodiment of the utility model;

[0030] Figure 8 It is the partial schematic view of the circuit breaker closed state in the embodiment of the utility model;

[0031] Figure 9 It is the partial schematic view of the circuit breaker switch handle return in the embodiment of the utility model;

[0032] Figure 10 It is the schematic view of the left shell and the second torsional spring cooperation in the embodiment of the utility model;

[0033] Figure 11 It is the whole structure schematic view of the test piece in the embodiment of the utility model;

[0034] Figure 12 It is the whole structure schematic view of the partition plate in the embodiment of the utility model;

[0035] Figure 13 It is the whole structure schematic view of the spring fixing piece in the embodiment of the utility model.

[0036] In the drawing: 1, shell; 11, handle mounting column; 12, left shell; 121, mounting convex column; 122, fixed boss; 1221, fixed groove; 123, left positioning table; 124, positioning column; 13, right shell; 2, test button; 21, extrusion end; 22, hand pressing end; 221, pressing groove; 23, conductive ring; 24, test piece; 241, wiring end; 2411, rectangular notch; 242, bent end; 25, lever shaft; 26, partition plate; 261, avoiding through hole; 262, right positioning table; 263, limiting column; 27, lever; 271, plug-in part; 272, limiting part; 273, pressing part; 28, spring fixing piece; 281, positioning hole groove; 29, gap; 3, switch handle; 31, open slot; 311, limiting wall; 32, body; 321, spring fixing groove; 322, mounting through hole; 323, positioning groove; 33, control part; 4, first torsional spring; 5, second torsional spring; 51, spring ring; 52, first extension arm; 53, second extension arm. DETAILED DESCRIPTION

[0037] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] like Figures 1-13 As shown, a circuit breaker anti-hand-striking test button device includes a housing 1, a test button 2, a switch handle 3, and a circuit board for controlling leakage protection. The housing 1 includes a left shell 12 and a right shell 13 that can be snapped together.

[0042] The switch handle 3 includes a control part 33 and a body 32. The control part 33 extends out of the housing 1 for operation. The body 32 has a circular structure. A mounting through hole 322 is provided at the center of the body 32. A handle mounting post 11 that can pass through the mounting through hole 322 is provided on the left housing 12. The mounting through hole 322 on the body 32 allows the handle mounting post 11 to pass through, thereby realizing relative rotation between the handle and the housing 1. A first torsion spring 4 for reset is provided on the switch handle 3. A second torsion spring 5 for reset is provided between the test button 2 and the housing 1.

[0043] The shell 1 is provided with a partition plate 26 and a spring fixing part 28, the partition plate 26 and the spring fixing part 28 are fixed on the left shell 12 and the right shell 13 respectively, a gap is left between the partition plate 26 and the left shell 12 for assembling an electrical conduction structure; a space is left between the partition plate 26 and the spring fixing part 28 for arranging a lever 27; the test button 2 comprises a press end 21 and a hand pressing end 22 which are integrally connected, the press end 21 and the hand pressing end 22 are respectively located on two sides of the partition plate 26, the press end 21 is above the lever 27, and the hand pressing end 22 extends out of the shell 1 through an opening of the left shell 12 and is above the electrical conduction structure;

[0044] The lever 27 comprises a plug-in part 271, limiting parts 272 and pressing parts 273 which extend from two sides of the plug-in part 271 respectively, the plug-in part 271, the limiting parts 272 and the pressing parts 273 are of an integral structure, the lever shaft 25 is arranged in the plug-in part 271, the lever 27 rotates around the lever shaft 25, the left shell 12 is provided with a fixed boss 122, the fixed boss 122 is provided with a fixed groove 1221, the partition plate 26 is provided with an avoiding through hole 261, the spring fixing part 28 is provided with a positioning hole groove 281, one end of the lever shaft 25 is inserted into the fixed groove 1221, the other end of the lever shaft 25 is inserted into the positioning hole groove 281 through the avoiding through hole 261, the lever shaft 25 is not directly abutted on the left shell 12 and the right shell 13, which is easy to install and will not shake with the loosening of the right shell 13, and the connection is more stable.

[0045] The outer circumference of the body 32 is provided with an open groove 31, the open groove 31 is of a circular arc structure, the open groove 31 comprises a limiting wall 311, the limiting wall 311 comprises an end face of the open groove 31 close to the lever 27 and an outer side thereof.

[0046] After the test button 2 is pressed, the switch handle 3 is reset, at the same time, the test button 2 presses the pressing part 273, the lever 27 rotates around the lever shaft 25, the limiting part 272 rotates into the open groove 31 and contacts and presses the limiting wall 311, so as to block the rotating action of the switch handle 3, the test button 2 is slowly released, the switch handle 3 can push the lever to gradually reset, so as to avoid the knocking of the fingers pressing the test button 2 caused by the sudden reset of the switch handle 3; and since the body 32 is of a circular structure, the distance between the outer surface thereof and the lever 27 is the same except the open groove 31, so there is no blocking, and the closing will not be blocked by the lever 27.

[0047] The body 32 is provided with a spring fixing groove 321 for placing the first torsion spring 4, the spring fixing groove 321 is provided with a positioning groove 323 at the side, and the spring fixing groove 321 is provided with a mounting through hole 322 penetrating therethrough, the left shell 12 is provided with a handle mounting column 11 which can pass through the mounting through hole 322, the two extension arms of the first torsion spring 4 are respectively placed in the positioning grooves 323 and extend out of the switch handle 3 to the spring fixing member 28, the control part 33 is convenient for people to control and drive the body 32 to rotate, the mounting through hole 322 of the body 32 is for the handle mounting column 11 to pass through, so that the relative rotation between the body 32 and the shell 1 is realized, and the first torsion spring 4 provided on the body 32 has one end of the extension arm extending into the spring fixing member 28, when the body 32 drives the first torsion spring 4 to rotate, the extension arm extending into the spring fixing member 28 is relatively fixed at this time, at this time, the first torsion spring 4 stores energy, and after being disconnected, the first torsion spring 4 can provide power for the switch handle 3 to reset.

[0048] Further, the gap 29 is formed between the partition plate 26 and the spring fixing member 28, the push rod shaft 25 passes through the gap 29 and is fixed at both ends on the left shell 12 and the spring fixing member 28, the push rod 27 is flexibly movable in the gap 29, the gap 29 limits the movement range of the push rod 27, ensures that the width of the push rod 27 and the opening groove 31 can be in the same plane interval, and the push rod 27 does not need to be pressed on the surface of the partition plate 26 or the spring fixing member 28, thereby reducing the frictional resistance of the push rod 27 when rotating, and the partition plate 26 further includes a limiting column 263 extending above the pressing part 273, the limiting column 263 is attached to the extrusion end 21 and limits the left and right positions of the test button 2 together with the shell 1.

[0049] The electrical conduction structure includes the second torsion spring 5, the conductive ring 23 and the test piece 24, the test piece 24 includes a wiring end 241 and a bent end 242 bent from the wiring end 241, the bent end 242 is provided with an upward end face, and the two sides of the wiring end 241 are provided with rectangular notches 2411, the test piece 24 is fixed and limited by the left shell 12 and the partition plate 26, the left shell 12 and the partition plate 26 are respectively provided with a left positioning table 123 and a right positioning table 262, and the two rectangular notches 2411 are respectively buckled with the left positioning table 123 and the right positioning table 262.

[0050] The conductive ring 23 is also fixed and limited by the left shell 12 and the partition plate 26, the left shell 12 is provided with a positioning column 124 for sleeving the conductive ring 23, and the partition plate 26 is attached to the outer end face of the positioning column 124 to limit the conductive ring 23 and prevent the conductive ring 23 from falling off.

[0051] The second torsion spring 5 is fixed by the left shell 12 and the switch handle 3, the left shell 12 has a mounting protrusion 121, the second spring 5 includes a spring ring 51 sleeved on the mounting protrusion 121, the switch handle 3 is close to the outer end surface of the mounting protrusion 121, the spring ring 51 is prevented from being separated from the mounting protrusion 121, and no abutment is required therebetween, friction resistance is prevented, and the switch handle 3 is prevented from being damaged by friction after being rotated.

[0052] The test piece 24 is below the hand pressing end 22, the conductive ring 23 and the test piece 24 are connected with the circuit board through wires, the circuit board is arranged in the shell 1, and the specific position is electrically isolated from the remaining devices, which is a prior art means, and the embodiment will not be described. The hand pressing end 22 is provided with a pressing groove 221 at the bottom in the shell 1, the second torsion spring 5 further includes a first extension arm 52 arranged in the pressing groove 221 and a second extension arm 53, and it should be noted that the second extension arm 53 can be in contact with the conductive ring 23 or not in contact, and only when the test button 2 is pressed, the first extension arm 52 contacts the test piece 24, and the second extension arm 53 contacts the conductive ring 23, so that the test circuit in the circuit board is conducted.

[0053] Further, the lever 27, the partition plate 26 and the spring fixing piece 28 are made of insulating materials to isolate the internal circuit of the circuit breaker and prevent the internal structure from causing leakage and short circuit.

[0054] Specifically, when the circuit breaker is in a closed state, the second extension arm 53 of the second torsion spring 5 is in contact with the conductive ring 23, when the leakage protection function is detected, the circuit breaker is powered on, and then a certain force is applied to the hand pressing end 22 of the test button 2 in the vertical direction, the pressing part 273 of the lever pressing end 21 is pressed, the lever 27 is rotated around the lever shaft 25, and with the rotation of the test button 2, the first extension arm 52 arranged in the pressing groove 221 abuts against the top surface of the bent end 242 of the test piece 24, the test circuit is connected at the moment of contact, the leakage protection function is triggered, and the circuit breaker trips. At this time, the switch handle 3 is reset, the limiting wall 311 of the switch handle 3 abuts against the limiting part 272 of the lever 27, the other end of the lever 27 is abutted by the lever pressing end 21 of the test button 2, the switch handle 3 stops resetting due to the force applied to the test button 2, and will not quickly reset to hit the hand. After the force on the test button 2 is removed, the test button 2 returns to the original position under the action of the second torsion spring 5, the switch handle 3 continues to reset under the action of the first torsion spring 4, the lever 27 also rotates around the lever shaft 25 under the push of the switch handle 3, and the reset is realized. When the circuit breaker is closed by pulling the operating part 33 next time, the switch handle 3 and the lever 27 will not be misaligned and stuck, the leakage protection function detection is successfully completed, and the handle does not hit the hand obviously.

[0055] In the detection of the leakage protection function, the test button 2 is pressed quickly and with great force until it is flush with or below the housing 1, reaching the maximum stroke. During the pressing process, the pressing end 21 of the test button 2 abuts against the pressing portion 273 of the lever 27, the lever 27 rotates around the lever shaft 25, the pressing portion 273 abuts against the limiting column 263 of the partition plate 26 extending to the same plane of the lever 27, reaching the maximum range of movement of the lever 27. At this time, the lever 27 has not yet abutted against the limiting wall 311, so in this extreme case, the test button 2 will not appear to be stuck and can smoothly realize the leakage protection function.

[0056] In summary, the test button device can not only change the size of the handle to cause appearance defects, but also can exercise normal functions and the handle return does not appear obvious beating when exercising functions.

Claims

1. A device for preventing a hand from being hit by a test button in a circuit breaker, comprising a shell (1), a test button (2), a switch handle (3) and a circuit board, the shell (1) comprising a left shell (12) and a right shell (13) which can be buckled and assembled, the switch handle (3) being inserted on the shell (1), and a first torsional spring (4) for resetting being arranged on the switch handle (3), a second torsional spring (5) for resetting being arranged between the test button (2) and the shell (1), characterized in that, The shell (1) is provided with a lever shaft (25) and a lever (27), the lever shaft (25) is relatively fixed in the shell (1), the lever (27) comprises a plug-in part (271), limiting parts (272) and pressing parts (273) respectively extending on both sides of the plug-in part (271), the plug-in part (271), the limiting parts (272) and the pressing parts (273) are integrated, the plug-in part (271) is rotatably connected with the lever shaft (25), the limiting parts (272) and the pressing parts (273) are rotatable around the lever shaft (25), the switch handle (3) comprises an open slot (31), the open slot (31) comprises a limiting wall (311), after the test button (2) is pressed, the switch handle (3) is reset, the test button (2) presses the pressing part (273), the lever (27) rotates around the lever shaft (25), the limiting part (272) rotates into the open slot (31), presses and prevents the limiting wall (311) from moving.

2. A device for preventing the manual tripping of a circuit breaker according to claim 1, characterized in that The shell (1) further comprises a partition plate (26) and a spring fixing part (28) respectively arranged on the left shell (12) and the right shell (13), the partition plate (26) is used for arranging the second torsional spring (5) and the lever (27) on both sides respectively, a gap (29) is formed between the partition plate (26) and the spring fixing part (28), the lever shaft (25) passes through the gap (29) and is fixed on the left shell (12) and the spring fixing part (28) at both ends, and the lever (27) is in the gap (29).

3. A device for preventing the manual tripping of a circuit breaker according to claim 2, characterized in that The left shell (12) is provided with a fixed boss (122), the fixed boss (122) is provided with a fixed groove (1221), the partition plate (26) is provided with an avoiding through hole (261), the spring fixing part (28) is provided with a positioning hole groove (281), one end of the lever shaft (25) is inserted into the fixed groove (1221), and the other end is inserted into the positioning hole groove (281) through the avoiding through hole (261).

4. A device for preventing manual tripping of a circuit breaker according to claim 2, wherein The test button (2) comprises an integrated extrusion end (21) and a hand pressing end (22), the extrusion end (21) and the hand pressing end (22) are respectively located on both sides of the partition (26), the extrusion end (21) is above the pressing part (273), the hand pressing end (22) extends out of the shell (1) through the opening of the left shell (12), the left shell (12) is provided with a conductive ring (23) and a test piece (24), the test piece (24) is below the hand pressing end (22), the conductive ring (23) and the test piece (24) are respectively connected with the circuit board through wires, the hand pressing end (22) is provided with a pressing groove (221) at the bottom in the shell (1), the second torsion spring (5) comprises a spring ring (51) sleeved on the mounting protruding column (121) of the left shell (12), a first extension arm (52) placed in the pressing groove (221) and a second extension arm (53), after the test button (2) is pressed down, the first extension arm (52) contacts the test piece (24), the second extension arm (53) contacts the conductive ring (23), and the test loop in the circuit board is conducted.

5. A hand-proof test button device in a circuit breaker according to claim 4, characterized in that The test piece (24) is limited and fixed by the left shell (12) and the partition (26), the left shell (12) and the partition (26) are respectively provided with a left positioning table (123) and a right positioning table (262), the test piece (24) comprises a wiring end (241) and a bending end (242) bent with the wiring end (241), the end surface of the bending end (242) is upwardly arranged, and the two sides of the wiring end (241) are respectively provided with a rectangular notch (2411), and the two rectangular notches (2411) are respectively buckled with the left positioning table (123) and the right positioning table (262).

6. A hand-proof test button device in a circuit breaker according to claim 4, characterized in that The conductive ring (23) is limited and fixed by the left shell (12) and the partition (26), the left shell (12) is provided with a positioning column (124) for sleeving the conductive ring (23), and the partition (26) abuts against the outer end surface of the positioning column (124).

7. A device for preventing manual tripping of a circuit breaker according to claim 4, wherein The lever (27), the partition (26) and the spring fixing part (28) are all made of insulating materials.

8. A device for preventing manual tripping of a circuit breaker according to claim 4, wherein The partition (26) further comprises a limiting column (263) extending above the pressing part (273), and the limiting column (263) is arranged on the extrusion end (21).

9. A device for preventing manual tripping of a circuit breaker according to claim 1, wherein The switch handle (3) comprises a control part (33) and a body (32), the body (32) is provided with a spring fixing groove (321) capable of placing the first torsion spring (4), the spring fixing groove (321) is provided with a positioning groove (323) on the side, the spring fixing groove (321) is provided with a mounting through hole (322) penetrating through, the left shell (12) is provided with a handle mounting column (11) capable of penetrating through the mounting through hole (322), and the two extension arms of the first torsion spring (4) are respectively arranged in the positioning groove (323) and extend out of the switch handle (3) into the spring fixing part (28).

10. A hand-proof test button device in a circuit breaker according to claim 8, characterized in that The opening slot (31) is arranged on the outer side wall of the body (32), and the limiting wall (311) comprises an end face of the opening slot (31) close to the lever (27) and a side edge of the opening slot (31) close to the lever (27).

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