Electromagnetic relay and locking mechanism

Abstract

The invention provides a locking mechanism which comprises a rotating shaft and a commutator segment which are arranged in a shell of an electromagnetic relay, the rotating shaft is rotatably installed in the shell through a rotating shaft rod, the rotating shaft is provided with a pushing part and a driving part, the commutator segment is provided with an operation part and a pressing part, and the operation part can drive the commutator segment to move back and forth between a non-locking position and a locking position. When the commutator segment is located at the non-locking position, the movable contact and the normally closed contact group are closed; and when the commutator segment is switched from the non-locking position to the locking position, the pressing part drives the pushing part of the rotating shaft, so that the driving part of the rotating shaft drives the movable contact spring row to drive the movable contact and the normally open contact group to be closed. An electromagnetic relay comprises a shell, a relay mechanism and a locking mechanism, wherein the relay mechanism and the locking mechanism are arranged in the shell. According to the electromagnetic relay and the locking mechanism, the commutator segment is operated to drive the rotating shaft, then the movable contact spring row is driven to achieve contact locking, the matching mode is simple, operation is easy, the commutator segment replaces an operating handle of the rotating shaft, and the problem that the operating handle of the rotating shaft is broken when the force is too large due to the fact that the operating handle is long is solved.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to an electromagnetic relay and a locking mechanism. Background Art

[0002] The locking mechanism of the electromagnetic relay in the prior art mostly uses a cam to press the moving spring row to lock the contacts after the shaft rotates, but this type of locking mechanism has the following defects: 1. The operating handle on the shaft is long and can easily break if too much force is applied; 2. It is easy to contact in the non-locked state, causing the product to lock incorrectly.

[0003] In addition, the prior art also discloses a flip-type locking mechanism, which generates a stroke by rotating a flip-up cover arranged on a top plate to press another structural member downward to force the movable spring to move and lock the contact. However, due to its relatively complex movement mechanism, the assembly process is slightly complicated, and the direction of pressing the movable spring row (vertical) and the locking movement direction (horizontal) are at an angle of nearly 90 degrees, so there is a risk of the movable spring row being forced out. Summary of the invention

[0004] The object of the present invention is to overcome at least one defect of the prior art and provide an electromagnetic relay and a locking mechanism.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The locking mechanism includes a rotating shaft and a commutator segment in a housing of an electromagnetic relay. The moving spring segment row of the electromagnetic relay is linked with the moving contact. The moving contact corresponds to the normally closed contact group and the normally open contact group. The rotating shaft is rotatably installed in the housing through a rotating shaft rod. The rotating shaft has a pushing part and a driving part. The commutator segment has an operating part and a pressing part. The operating part can drive the commutator segment to move back and forth between a non-locking position and a locking position. When the commutator segment is in the non-locking position, the moving contact and the normally closed contact group are closed. When the commutator segment is switched from the non-locking position to the locking position, the pressing part drives the pushing part of the rotating shaft, so that the driving part of the rotating shaft drives the moving spring segment row to drive the moving contact and the normally open contact group to close.

[0007] Preferably, the movement of the commutator segment is translational, the commutator segment and the row of movable spring leaves are located on the same side of the rotating shaft, the commutator segment moves horizontally to press the pushing portion of the rotating shaft, and after the rotating shaft rotates, the driving portion of the rotating shaft horizontally presses the row of movable spring leaves to lock the contacts.

[0008] Preferably, the operating part and the pressing part of the commutator segment are block structures, the pressing part is arranged on one side of the operating part close to one end of the rotating shaft and directly opposite to the pushing part of the rotating shaft, and an upwardly protruding handle is provided on the top surface of the operating part.

[0009] Preferably, the movement of the commutator segment is rotation, and the operating part and the pressing part of the commutator segment are rod-shaped structures, one end of which is connected at an angle α, and a commutator shaft rod installed on the shell for rotating the commutator segment is provided at the intersection of the operating part and the pressing part, and a handle protruding along the axis of the commutator segment is provided at the other end of the operating part.

[0010] Preferably, an elastic clamp is provided in the housing, and a limiting portion cooperating with the elastic clamp is provided on the operating portion of the commutator segment, and the elastic clamp is engaged with the limiting portion when the commutator segment is in the non-locking position or the locking position.

[0011] Preferably, the movement of the commutator segment is translational, the elastic clamp is a straight spring piece, a limiting rib is provided on the straight spring piece, and the limiting portion includes a first limiting groove and a second limiting groove which are sequentially arranged along the non-locking direction.

[0012] Preferably, the movement of the commutator segment is rotation, and the elastic clamp includes a first spring sheet and a second spring sheet arranged in sequence along the locking direction, the fixed ends of the first spring sheet and the second spring sheet are close to each other, and the movable ends are arranged far apart, a first limiting protrusion is provided on the movable end of the first spring sheet, and a second limiting protrusion is provided on the movable end of the second spring sheet, the limiting portion is an end of the operating portion with a handle, and the end of the operating portion with a handle presses the first spring sheet and the second spring sheet downward to deform through the first limiting protrusion and the second limiting protrusion respectively, and limits the commutator segment in the non-locking position and the locking position respectively through the first limiting protrusion and the second limiting protrusion.

[0013] Preferably, the pushing portion of the rotating shaft extends axially along the rotating shaft rod to form a reset spring piece, and a reset protrusion is provided in the shell. In the non-locking position, the reset spring piece is tangent to the reset protrusion, and in the locking process, the reset spring piece is blocked by the reset protrusion.

[0014] Preferably, the reset spring sheet extends upward to form a limiting protrusion, and the limiting protrusion abuts against the top cover of the shell.

[0015] Preferably, the rotating shaft is a sheet structure with a rotating shaft rod in the middle, the upper part of the rotating shaft is a pushing part, and the lower part is a driving part, and the end of the driving part protrudes toward the dynamic spring leaf row to form a protrusion that cooperates with the dynamic spring leaf row.

[0016] Preferably, the shell includes a coverable bottom shell and a top cover, and a first cavity for accommodating a rotating shaft and a second cavity for accommodating a commutator segment are arranged side by side in the bottom shell. A mounting groove for limiting a rotating shaft rod and rotating the rotating shaft is provided in the first cavity, and the first cavity and the second cavity are connected. The pressing portion of the commutator segment can enter the first cavity from the second cavity and abut against the pushing portion of the rotating shaft; the top cover is provided with a through operating hole at the position corresponding to the commutator segment, which is used to highlight the handle for manual operation of the commutator segment.

[0017] Preferably, a raised indication window and a light window are provided on the top of the bottom shell; the top cover is provided with a test hole corresponding to the pushing portion of the rotating shaft, an indication hole corresponding to the indication window, a lamp hole corresponding to the light window, and a strip-shaped groove; an annular groove surrounding the lamp hole and an oblique groove surrounding the indication hole are provided on the bottom surface of the top cover, and the oblique groove gradually inclines in a direction approaching the indication hole; a bayonet that is buckled with the top cover is provided on the outer side of the top end of the bottom shell, and a buckle corresponding to the bayonet is provided on the inner side of the side edge of the top cover.

[0018] An electromagnetic relay comprises a housing, a relay mechanism in the housing and a locking mechanism as described in any one of the above technical solutions, wherein the relay mechanism comprises a moving spring row, a moving contact, a normally closed contact group and a normally open contact group.

[0019] The electromagnetic relay and locking mechanism of the present invention drive the rotating shaft by operating the commutator segment, and then drive the moving spring leaf row to realize the locking contact. The coordination method is simple and easy to operate. The commutator segment replaces the operating handle of the rotating shaft, which solves the problem that the rotating shaft operating handle is too long and breaks when too much force is applied. The rotating shaft and the commutator segment are arranged in the housing, which solves the problem that they are easily touched in the non-locked state, causing the product to be locked incorrectly.

[0020] In addition, the movement direction of the rotating shaft is consistent with the locking movement direction of the moving spring row, which also avoids the risk of the moving spring row coming out. The simple movement mechanism, the movement mode of the commutator and the simple coordination with the rotating shaft, the assembly process has no requirements for the coordination accuracy of the components, and the assembly process is extremely simplified.

[0021] In addition, when the commutator segment is in the non-locked position or the locked position, the elastic clip engages with the limit portion to limit the position of the commutator segment to ensure that there will be no malfunction in the non-locked state and no resetting in the locked state, so that the commutator segment remains in the non-locked or locked position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the electromagnetic relay and the rotating shaft structure in the non-locking state of the present invention;

[0023] Figure 2 is a cross-sectional view of the electromagnetic relay and the rotating shaft structure in a locked state of the present invention;

[0024] Figure 3 It is a cross-sectional view of the structure of the relay and the commutator segment in the non-locking state of the present invention;

[0025] Figure 4 It is a cross-sectional view of the relay and commutator structure in a locked state of the present invention;

[0026] Figure 5 is a top view of the housing in the unlocked state of embodiment 1 of the present invention;

[0027] Figure 6 is a top view of the housing in a locked state of embodiment 1 of the present invention;

[0028] Figure 7 1 is a top view of the inner structure of the bottom shell of the electromagnetic relay in the non-locking state of the first embodiment of the present invention;

[0029] Figure 8 1 is a top view of the structure inside the bottom shell of the electromagnetic relay in the locked state according to the first embodiment of the present invention;

[0030] Fig. 9 is a three-dimensional diagram of the bottom shell of embodiment 1 of the present invention;

[0031] Fig.10 is a top view of the bottom shell of Embodiment 1 of the present invention;

[0032] Fig.11 is a side view of the bottom shell of embodiment 1 of the present invention;

[0033] Fig.12 is a three-dimensional diagram of the rotating shaft of embodiment 1 of the present invention;

[0034] Fig.13 This is a front view of the rotating shaft of Embodiment 1 of the present invention;

[0035] Fig.14 is a side view of the rotating shaft of Embodiment 1 of the present invention;

[0036] Fig.15 is a three-dimensional diagram of a commutator segment according to embodiment 1 of the present invention;

[0037] Fig.16 is a front view of a commutator segment according to embodiment 1 of the present invention;

[0038] Fig.17 is a side view of a commutator segment of Embodiment 1 of the present invention;

[0039] Fig.18 is a three-dimensional diagram of the top cover of embodiment 1 of the present invention;

[0040] Fig.19 is a front view of the top cover of embodiment 1 of the present invention;

[0041] Fig. 20 is a top view of the housing in the non-locked state of embodiment 2 of the present invention;

[0042] Fig.21 is a top view of the housing in a locked state of embodiment 2 of the present invention;

[0043] Fig. 22 1. It is a top view of the structure inside the bottom shell of the electromagnetic relay in the non-locking state of the second embodiment of the present invention;

[0044] Fig.23is a top view of the inner structure of the bottom shell of the electromagnetic relay in the locked state according to the second embodiment of the present invention;

[0045] Fig.24 is a three-dimensional diagram of the bottom shell of embodiment 2 of the present invention;

[0046] Relay mechanism 1; insulating sheet 101; moving spring sheet row 102; moving contact 103; normally closed contact group 104; normally open contact group 105; indicator 2; mounting shaft 201, hinge shaft 202, indicator sheet 203; bottom shell 3; first cavity 301; mounting groove 302; U-shaped side wall 3021; ​​second cavity 303; straight spring sheet 3031; limiting rib 3032; reset convex point 3033; first spring sheet 3034; first limiting convex point 3035; second spring sheet 3036; second limiting convex point 3037; indicator window 3 04; lamp window 305; bayonet 306; shaft hole 307; shaft 4; reset spring 401; limiting convex point 402; pushing part 403; shaft shaft rod 404; driving part 405; protruding part 406; commutator 5; operating part 501; handle 5011; first limiting groove 502; second limiting groove 503; pressing part 504; commutator shaft rod 505; top cover 6; operating hole 601; test hole 602; indication hole 603; lamp hole 604; strip groove 605; annular groove 606; buckle 607; oblique groove 608. DETAILED DESCRIPTION

[0047] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the electromagnetic relay and the locking mechanism of the present invention. The electromagnetic relay and the locking mechanism of the present invention are not limited to the description of the following embodiments.

[0048] like Figure 1-4As shown, the electromagnetic relay of this embodiment includes a housing, a relay mechanism 1 in the housing, an indicator 2 and a locking mechanism. The relay mechanism 1 includes a moving spring row 102, a moving contact 103, a normally closed contact group 104 and a normally open contact group 105. The moving spring row 102 of the electromagnetic relay is linked with the moving contact 103, and the moving contact 103 corresponds to the normally closed contact group 104 and the normally open contact group 105. The locking mechanism includes a rotating shaft 4 and a commutator segment 5 in the housing. The rotating shaft 4 is rotatably installed in the housing through a rotating shaft rod 404. The rotating shaft 4 has a pushing portion 403 and a driving portion 405. The commutator segment 5 can move between a non-locking position and a locking position. The commutator segment 5 has an operating portion 501 and a pressing portion 504. The operating portion 501 can drive the commutator segment 5 to move back and forth between the non-locking position and the locking position. When in the non-locking position, the rotating shaft 4, the commutator segment 5 The plate 5 is in the initial position, the driving part 405 of the rotating shaft 4 does not press the moving spring plate row 102 provided in the relay mechanism 1, and the moving contact 103 is closed with the normally closed contact group 104; the operating part 501 of the commutator plate 5 is pushed to switch the commutator plate 5 from the non-locking position to the locking position, and the pressing part 504 drives the pushing part 403 of the rotating shaft 4, so that the driving part 405 of the rotating shaft 4 drives the moving spring plate row 102 to drive the moving contact 103 and the normally open contact group 105 to close, and realize the locking contact. The electromagnetic relay and locking mechanism of this embodiment drive the rotating shaft 4 by operating the commutator plate 5, and then drive the moving spring plate row 102 to realize the locking contact. The matching method is simple and easy to operate. The commutator plate 5 replaces the operating handle of the rotating shaft 4, which solves the problem that the rotating shaft operating handle is too long and breaks when too much force is applied, and the rotating shaft 4 and the commutator plate 5 are arranged in the housing, which solves the problem that it is easy to contact in the non-locking state and cause the product to be locked incorrectly.

[0049] like Figure 1-4 As shown, the housing of this embodiment includes a coverable bottom shell 3 and a top cover 6, wherein the bottom shell 3 is provided with a first cavity 301 for accommodating the rotating shaft 4 and a second cavity 303 for accommodating the commutator segment 5 side by side, wherein the first cavity 301 is provided with a mounting groove 302 for limiting the rotating shaft rod 404 of the rotating shaft 4 and rotating the rotating shaft 4, wherein the mounting groove 302 is formed by two U-shaped side walls 3021 with openings facing upward and symmetrically arranged. The first cavity 301 and the second cavity 303 are connected, and the pressing portion 504 of the commutator segment 5 can enter the first cavity 301 from the second cavity 303 and abut against the pushing portion 403 of the rotating shaft 4; the top cover 6 is provided with a through operating hole 601 at the position corresponding to the commutator segment 5, which is used to highlight the handle 5011 for manually operating the commutator segment 5.

[0050] like Figure 9-11 As shown, the top of the bottom shell 3 is provided with a raised indication window 304 and a light window 305, and the top outer side of the bottom shell 3 is provided with a bayonet 306 that is buckled with the top cover 6. Figure 18-19As shown, the top cover 6 is provided with a test hole 602 corresponding to the push portion 403 of the rotating shaft 4, an indication hole 603 corresponding to the indication window 304, a lamp hole 604 corresponding to the lamp window 305, and a strip groove 605 for fixing the hook. The test hole 602 is used to use a screwdriver or a similar tool to probe into the temporary locking contact of the pull-out rotating shaft 4 in the non-locking state. The bottom surface of the top cover 6 is provided with an annular groove 606 surrounding the lamp hole 604 and an inclined groove 608 surrounding the indication hole 603. The inclined groove 608 is gradually inclined in the direction close to the indication hole 603 to accommodate the bottom shell boss, and the depth of the indication hole 603 can be reduced to facilitate observation due to angle problems. The inner side of the side edge of the top cover 6 is provided with a buckle 607 corresponding to the bayonet 306. When installing, the top cover 6 is covered on the bottom shell 3, and the buckle 607 is buckled in the bayonet 306 to achieve the buckling and fastening of the top cover 6 and the bottom shell 3.

[0051] like Figure 1-2 As shown, the indicator 2 of this embodiment has a right-angled triangle indicator body, two acute angles are respectively provided with a mounting shaft 201 for limiting assembly with the bottom shell 3 and a hinge shaft 202 hinged with the insulating sheet 101 of the relay mechanism 1, and the other right angle extends upward to connect with the indicator sheet 203, and the indicator sheet 203 is located below the indicator window 304 of the bottom shell 3. Figure 1 As shown, in the non-locked state, the indicator sheet 203 is in the initial position; Figure 2 As shown, in the locked state, the hinge shaft 202 of the indicator 2 is hinged with the insulating sheet 101 of the relay mechanism 1 and moves synchronously, and forces the indicator sheet 203 to be directly below the indicator window 304.

[0052] like Figure 1-2 , Figure 22-23 As shown, the pusher 403 of the rotating shaft 4 extends axially along the rotating shaft rod 404 to form a reset spring 401, and a reset convex point 3033 is provided in the housing. The reset spring 401 is tangent to the reset convex point 3033 when in the non-locking position, and the reset spring 401 is blocked by the reset convex point 3033 during the locking process. The reset convex point 3033 cooperates with the reset spring 401 to generate a reset reaction force. The reset spring 401 extends upward to form a limit convex point 402, and the limit convex point 402 abuts against the top cover 6 of the housing to form an upper limit position of the rotating shaft 4.

[0053] like Figure 1-2 , Figure 12-14 As shown, the rotating shaft 4 is a sheet structure with a rotating shaft rod 404 in the middle, the upper part of the rotating shaft 4 is a pushing part 403, and the lower part is a driving part 405. The end of the driving part 405 protrudes toward the dynamic spring leaf row 102 to form a protrusion 406 that cooperates with the dynamic spring leaf row 102. The two ends of the rotating shaft rod 404 are respectively placed in the openings of the two U-shaped side walls 3021 to realize the rotating installation of the rotating shaft 4.

[0054] like Figure 3-4 , Figure 22-23 As shown, an elastic clamp is provided in the second cavity 303 of the bottom shell 3 of the housing, and a limiting portion cooperating with the elastic clamp is provided on the operating portion 501 of the commutator segment 5. The elastic clamp is engaged with the limiting portion when the commutator segment 5 is in the non-locking position or the locking position. The position of the commutator segment 5 is limited to ensure that it will not malfunction in the non-locking state and will not reset in the locking state, so that the commutator segment 5 remains in the non-locking or locking position.

[0055] In the first embodiment of the present invention, the movement of the commutator segment 5 is a translational movement. The commutator segment 5 and the moving spring strip row 102 are located on the same side of the rotating shaft 4. The commutator segment 5 is located above the moving spring strip row 102. The commutator segment 5 moves horizontally in the second cavity 303 provided at the top of the bottom shell 3 to press the push portion 403 of the rotating shaft 4. After the rotating shaft 4 rotates, the driving portion 405 of the rotating shaft 4 presses the moving spring strip row 102 to lock the contact. The movement direction of the rotating shaft 4 is consistent with the locking movement direction of the moving spring strip row 102, which also avoids the risk of the moving spring strip row 102 coming out.

[0056] The operating part 501 and the pressing part 504 of the commutator segment 5 of this embodiment are block structures, the pressing part 504 is arranged on one side of the operating part 501 close to one end of the rotating shaft 4, and is directly opposite to the pushing part 403 of the rotating shaft 4, and a handle 5011 is provided on the top surface of the operating part 501, which protrudes upward and passes through the operating hole 601 of the shell. The commutator segment 5 of this embodiment has a simple structure, and the movement mode of the commutator segment 5 and the coordination with the rotating shaft 4 are simple. The simple movement mechanism does not require the coordination accuracy of the components during the assembly process, and the assembly process is extremely simplified.

[0057] The elastic clamp of this embodiment is a straight spring piece 3031, on which a limiting convex rib 3032 is provided. The limiting portion of this embodiment includes a first limiting groove 502 and a second limiting groove 503 arranged in sequence on the bottom surface of the operating portion 501 along the non-locking direction. The limiting convex rib 3032 is inserted into the first limiting groove 502 in the non-locking position, and the limiting convex rib 3032 is inserted into the second limiting groove 503 in the locking position. The limiting structure of the convex rib and the groove type commutator segment 5 is simple in structure and improves the limiting stability.

[0058] The non-locking state of this embodiment, such as Figure 1 As shown, the moving contact 103 is in a closed state with the normally closed contact group 104; Figure 3 As shown, the limiting rib 3032 on the straight spring piece 3031 is inserted into the first limiting groove 502 of the commutator segment 5 and is in the initial position; Figure 5 As shown, the handle 5011 passes through the square operation hole 601 provided on the top cover 6 and is held on the right side, and the corresponding display is OPEN or similar words; Figure 7As shown, the restoring spring piece 401 of the rotating shaft 4 is tangent to the restoring protrusion 3033 on the left side of the bottom shell 3 to maintain the initial state.

[0059] The locking action process of this embodiment is as follows: Figure 2 , Figure 4 , Figure 8 As shown, the handle 5011 of the commutator 5 moves to the left after being operated, the straight spring piece 3031 of the bottom shell 3 is deformed, and the limiting rib 3032 escapes from the first limiting groove 502, enters the second limiting groove 503, and is limited in the locking position with the second limiting groove 503 of the commutator 5. The pressing portion 504 of the commutator 5 pushes the pushing portion 403 of the shaft 4, forcing the restoring spring piece 401 to deform relative to the reset convex point 3033 of the bottom shell 3 to accumulate potential energy, and the shaft 4 moves around the center of the shaft rod 404, and through the driving The protrusion 406 on the part 405 presses the moving spring strip 102 of the relay mechanism 1, so that the moving contact 103 is in a closed state with the normally open contact group 105. Since the insulating sheet 101 is fixedly connected to the moving spring strip 102, the hinge shaft 202 of the indicator 2 moves synchronously with the insulating sheet 101 of the relay mechanism 1, and forces the indicator strip 203 to be in the position of the indicator window 304 of the bottom shell 3; at the same time, a screwdriver can be used to press the push part 403 of the rotating shaft 4 through the test hole 602 of the top cover 6 to achieve the same effect. Figure 6 As shown, the handle 5011 passes through the square operation hole 601 provided on the top cover 6 and is held on the left side, and the word LOCK or similar words are displayed.

[0060] When the screwdriver is removed or the handle 5011 of the commutator 5 is moved to the right, the restoring spring 401 of the shaft 4 releases potential energy, drives the shaft 4 back to the initial position, and separates the moving contact 103 from the normally open contact group 105, thereby returning to the non-locking state.

[0061] Embodiment 2 of the present invention, as Figure 22-23 As shown, the assembly relationship between the rotating shaft 4 and the bottom shell 3 is the same as that of embodiment 1, except that the structure and movement mode of the commutator segment 5, the matching structure of the elastic clamp and the limiter, and the second cavity 303 of the bottom shell 3 is a fan-shaped cavity. The movement of the commutator segment 5 of this embodiment is rotation. The operating part 501 and the pressing part 504 of the commutator segment 5 are rod-shaped structures, one end of which is connected at an angle α, and a commutator segment shaft rod 505 for rotating the commutator segment 5 installed on the shell is provided at the intersection of the operating part 501 and the pressing part 504, which cooperates with the shaft hole 307 of the bottom shell 3, and a handle 5011 protruding along the axis of the rotating shaft of the commutator segment 5 (the axial direction of the commutator segment shaft rod 505) is provided on the other end of the operating part 501. Angle α is preferably an acute angle. The rotating commutator segment 5 is more labor-saving to operate, and the movement is smoother and more coherent, which improves the sense of use.

[0062] like Figure 22-24As shown, the elastic clamp of this embodiment includes a first spring piece 3034 and a second spring piece 3036 which are arranged in sequence along the locking direction, the fixed ends of the first spring piece 3034 and the second spring piece 3036 are close to each other, and the movable ends are arranged away from each other, a first limiting protrusion 3035 is provided on the movable end of the first spring piece 3034, and a second limiting protrusion 3037 is provided on the movable end of the second spring piece 3036. The limiting part of this embodiment is that the operating part 501 is provided with one end of the handle 5011, and the operating part 501 is provided with one end of the handle 5011, which presses the first spring piece 3034 and the second spring piece 3036 downward to deform through the first limiting protrusion 3035 and the second limiting protrusion 3037 respectively, and limits the commutator piece 5 in the non-locking position and the locking position respectively through the first limiting protrusion 3035 and the second limiting protrusion 3037. Specifically, in this embodiment, two through holes are provided at the bottom of the second cavity 303, the first spring clip 3034 and the second spring clip 3036 are semi-elliptical, and the size of the first spring clip 3034 and the second spring clip 3036 is smaller than the size of the through holes, the fixed ends of the first spring clip 3034 and the second spring clip 3036 are respectively connected to the side walls of the two through holes, and there is a movable gap between the movable ends of the first spring clip 3034 and the second spring clip 3036 and the side walls of the through holes. When moving from the non-locked state to the locked state, the operating part 501 is provided with one end of the handle 5011 to press and deform the first spring piece 3034 and the first limiting protrusion 3035, the second spring piece 3036 and the second limiting protrusion 3037 downward in sequence, completing the state switching and limiting. In the locked state, the side wall of one end of the handle 5011 of the operating part 501 abuts against the outer side of the second limiting protrusion 3037; when moving from the locked state to the non-locked state, the operating part 501 is provided with one end of the handle 5011 to press and deform the second spring piece 3036 and the second limiting protrusion 3037, the first spring piece 3034 and the first limiting protrusion 3035 downward in sequence, completing the state switching and limiting. In the non-locked state, the side wall of one end of the handle 5011 of the operating part 501 abuts against the outer side of the first limiting protrusion 3035. The limiting structure of the commutator segment 5 is formed by the operating portion 501 , the spring sheet and the limiting protrusion, which will not cause excessive obstacles to the movement of the commutator segment 5 and can also ensure the limiting stability of the commutator segment 5 .

[0063] The non-locking state of this embodiment, such as Fig. 22 As shown, the moving contact 103 is in a closed state with the normally closed contact group 104, and one end of the handle 5011 provided on the operating portion 501 is limited to the outside of the first limiting protrusion 3035; Fig. 20 As shown, the handle 5011 of the commutator segment 5 passes through the arc-shaped operating hole 601 provided on the top cover 6 and is held on the right side, and OPEN or similar words are displayed accordingly.

[0064] The locking action process of this embodiment is as follows: Fig.23 As shown, the manual part 5011 of the commutator segment 5 is manually operated to force the commutator segment 5 to move counterclockwise around the commutator segment shaft rod 505. The operating part 501 is provided with a handle 5011 at one end to squeeze the first spring piece 3034, move to the left and squeeze the second spring piece 3036, and finally limit it to the outside of the second limit convex point 3037. The pressing part 504 moves and presses the pushing part 403 of the shaft 4, and forces the normally open contact group 105 to close and maintain as described in embodiment 1; similarly, using a screwdriver to pass through the top cover 6 to press the pushing part 403 of the shaft 4 can also achieve the same effect. Fig.21 As shown, the handle 5011 of the commutator segment 5 passes through the arc-shaped operating hole 601 provided on the top cover 6 and is held on the left side, and LOCK or similar words are displayed accordingly.

[0065] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0066] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A locking mechanism, comprising a rotating shaft (4) and a commutating piece (5) in a housing of an electromagnetic relay, wherein a movable spring sheet row (102) of the electromagnetic relay is linked with a movable contact (103), wherein the movable contact (103) corresponds to a normally closed contact group (104) and a normally open contact group (105), and wherein: The rotating shaft (4) is rotatably installed in the housing through a rotating shaft rod (404). The rotating shaft (4) has a pushing part (403) and a driving part (405). The commutator (5) has an operating part (501) and a pressing part (504). The operating part (501) can drive the commutator (5) to move back and forth between a non-locking position and a locking position. When the commutator (5) is in the non-locking position, the moving contact (103) and the normally closed contact group (104) are closed. When the commutator (5) is switched from the non-locking position to the locking position, the pressing part (504) drives the pushing part (403) of the rotating shaft (4), so that the driving part (405) of the rotating shaft (4) drives the moving spring leaf row (102) to drive the moving contact (103) and the normally open contact group (105) to close.

2. The locking mechanism according to claim 1, characterized in that: The movement of the commutator segment (5) is translational. The commutator segment (5) and the row of movable springs (102) are located on the same side of the rotating shaft (4). The commutator segment (5) moves horizontally to press the pushing portion (403) of the rotating shaft (4). After the rotating shaft (4) rotates, the driving portion (405) of the rotating shaft (4) presses the row of movable springs (102) horizontally to lock the contacts.

3. The locking mechanism according to claim 2, characterized in that: The operating portion (501) and the pressing portion (504) of the commutator segment (5) are block structures. The pressing portion (504) is arranged on one side of the operating portion (501) close to one end of the rotating shaft (4) and directly faces the pushing portion (403) of the rotating shaft (4). A handle (5011) protruding upward is arranged on the top surface of the operating portion (501).

4. The locking mechanism according to claim 1, characterized in that: The movement of the commutator segment (5) is rotation. The operating portion (501) and the pressing portion (504) of the commutator segment (5) are rod-shaped structures, one end of which is connected at an angle α. A commutator segment shaft rod (505) for rotating the commutator segment (5) and mounted on a housing is provided at the intersection of the operating portion (501) and the pressing portion (504). A handle (5011) protruding along the axis of the commutator segment (5) is provided at the other end of the operating portion (501).

5. The locking mechanism according to any one of claims 1 to 4, characterized in that: An elastic clamp is provided in the housing, and a limiting portion cooperating with the elastic clamp is provided on the operating portion (501) of the commutator segment (5). The elastic clamp is engaged with the limiting portion when the commutator segment (5) is in the non-locking position or the locking position.

6. The locking mechanism according to claim 5, characterized in that: The movement of the commutator segment (5) is translational, the elastic clamp is a straight spring piece (3031), a limiting rib (3032) is provided on the straight spring piece (3031), and the limiting portion comprises a first limiting groove (502) and a second limiting groove (503) which are sequentially arranged along a non-locking direction.

7. The locking mechanism according to claim 5, characterized in that: The movement of the commutator (5) is rotation. The elastic clamp comprises a first elastic piece (3034) and a second elastic piece (3036) arranged in sequence along the locking direction. The fixed ends of the first elastic piece (3034) and the second elastic piece (3036) are close to each other and the movable ends are arranged far apart. The movable end of the first elastic piece (3034) is provided with a first limiting convex point (3035), and the movable end of the second elastic piece (3036) is provided with a second limiting convex point (3037). The limiting portion is an end of the operating portion (501) provided with a handle (5011), and the operating portion (501) is provided with an end of the handle (5011) which presses the first spring sheet (3034) and the second spring sheet (3036) downward to deform through the first limiting protrusion (3035) and the second limiting protrusion (3037), and limits the commutator segment (5) in the non-locking position and the locking position respectively through the first limiting protrusion (3035) and the second limiting protrusion (3037).

8. The locking mechanism according to any one of claims 1 to 4, characterized in that: The pushing portion (403) of the rotating shaft (4) extends axially along the rotating shaft rod (404) to form a reset spring piece (401), and a reset convex point (3033) is provided in the shell. When in the non-locking position, the reset spring piece (401) is tangent to the reset convex point (3033), and during the locking process, the reset spring piece (401) is blocked by the reset convex point (3033).

9. The locking mechanism according to claim 8, characterized in that: The reset spring sheet (401) extends upward to form a limiting protrusion (402), and the limiting protrusion (402) abuts against the top cover (6) of the shell.

10. Electromagnetic relay, characterized in that: It comprises a housing, a relay mechanism (1) in the housing and a locking mechanism as claimed in any one of claims 1 to 9, wherein the relay mechanism (1) comprises a movable spring row (102), a movable contact (103), a normally closed contact group (104) and a normally open contact group (105).

Images