A push button switch

Abstract

The present invention discloses a push button switch, including a base, a mounting base, and a button. A moving contact piece, a normally closed static contact piece, and a normally open static contact piece are arranged on the base. A push rod is arranged between the moving contact piece and the button. A connecting column is fixedly arranged on the mounting base. A baffle plate that blocks the top of the push rod is movably sleeved on the connecting column. The baffle plate is elastically connected to the button and moves vertically with the button. After the button is pressed, the baffle plate is driven to move downward, and the moving contact piece is driven to switch to contact with the normally open static contact piece to conduct the circuit. After the button is pressed continuously, the baffle plate is driven by the connecting column to rotate, and the pressure on the push rod is released. After the moving contact piece loses the pressure of the push rod, it is switched to be separated from the normally open static contact piece and the circuit is disconnected. The beneficial effect of the present invention is that after the circuit has been conducted, whether the button is released or pressed continuously, the circuit can be quickly disconnected, which is safer and more reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of electric switches, and in particular relates to a push button switch. Background Art

[0002] Push button switches are also called key switches. They are mainly used to control the on and off of circuits, thereby starting or shutting down load devices. Due to their simple structure and easy operation, they have been widely used in industrial automation production or household electrical equipment control.

[0003] A push button switch generally includes a button and a moving contact piece, wherein the moving contact piece is elastically installed in the switch. In the initial state, the moving contact piece is in contact with the normally closed static contact piece, and the circuit is in the disconnected state. After the button is pressed down, the moving contact piece is driven by the button to convert, and finally contacts with the normally open static contact piece, and the circuit enters the on state.

[0004] When the push button switch does not have a self-locking function, you only need to release the button and the moving contact piece will be driven by the elastic force to automatically reset to contact the normally closed static contact piece to switch the circuit to the disconnected state. However, if the load device exhibits unexpected movements after the circuit is turned on, the operator may press the button tightly out of panic, causing the load device to fail to shut down in time, which may easily cause a safety accident. Summary of the invention

[0005] In the existing push button switch, after the circuit is turned on by pressing it, if the load device controlled by the circuit behaves unexpectedly, the operator may press the button more tightly due to panic, so that the load device cannot be turned off in time. To solve this problem, the present invention aims to provide a push button switch which can quickly disconnect the circuit after being pressed, whether the button is pressed or released. The contents are as follows:

[0006] A push button switch comprises a shell, in which a base and a button are arranged, the base is provided with a moving contact piece, a normally closed static contact piece, and a normally open static contact piece, the moving contact piece is in contact with the normally closed static contact piece, the moving contact piece is also transmission-connected with a push rod, the base is also fixed with a mounting seat located below the button, the moving contact piece is elastically connected to the mounting seat, a connecting column is fixedly provided on the mounting seat, a first guide plate is provided at the bottom of the connecting column, a baffle plate that blocks the top of the push rod is movably sleeved on the connecting column, the baffle plate is elastically connected to the button and moves vertically with the button, and a second guide plate that contacts the first guide plate is provided at the bottom of the baffle plate.

[0007] When the button is pressed, the baffle moves downward, and when the baffle moves downward, it pushes the push rod downward and drives the moving contact piece to switch to contact with the normally open static contact piece. After the button is pressed continuously, the second guide plate continues to move downward with the button, and rotates to one side due to the resistance of the first guide plate. The baffle rotates accordingly and releases the pressure on the push rod. The moving contact piece is driven by the elastic force and switches to separate from the normally open static contact piece.

[0008] Furthermore, the button is provided with a mounting groove, a rod socket is provided at the bottom of the mounting groove, a rod head is provided at the top of the push rod and is inserted into the rod socket, the connecting column passes through the mounting groove, the baffle is elastically connected to the mounting groove, and a baffle head is provided at the end of the baffle to block the top of the rod socket. After the baffle rotates to disengage from blocking the rod socket, the push rod loses its pressure.

[0009] Furthermore, a protruding plate and a first limiting plate are provided in the mounting groove, one side of the baffle is elastically connected to the protruding plate by a first spring, and the other side is blocked by the first limiting plate. After the button is pressed and moved downward, the baffle rotates toward the protruding plate, and the first spring contracts. After the button is released and moved upward, the baffle is driven by the first spring to rotate toward the first limiting plate.

[0010] Furthermore, the baffle is also provided with an annular plate, the annular plate is provided with a notch, a second limiting plate adapted to the annular plate portion is provided in the mounting groove, and the second limiting plate is provided with a limiting block blocking above the annular plate to prevent the baffle from moving upward relative to the button during the movement of the button.

[0011] Furthermore, a connecting hole is provided on the mounting seat, and a connecting head is provided at the bottom of the connecting column, and the connecting head is threadedly connected to the connecting hole so that the connecting column can be detachably fixed on the mounting seat. After the connecting column is rotated, the baffle is driven to rotate in advance through the first guide plate, which can shorten the button pressing distance required to make the baffle disengage from blocking the rod socket.

[0012] Furthermore, a sealing plate is threadedly connected to the opening of the installation groove, a sleeve is provided at the bottom of the sealing plate and is sleeved on the outside of the connecting column, a first slot is provided at the top of the connecting column, and a second slot is provided at the top of the sealing plate.

[0013] Furthermore, an outer sealing groove is provided above the sealing plate, a cover plate is fixedly provided on the top of the button, and a first plug block inserted into the outer sealing groove and a second plug block inserted into the second slot are provided at the bottom of the cover plate to separate the installation groove from the outside.

[0014] Furthermore, the first guide plate is provided with a first guide surface extending obliquely, the second guide plate is provided with a second guide surface extending obliquely, the first guide surface is in contact with the second guide surface, and after the button moves downward, the first guide surface contacts the second guide surface and rotates to one side.

[0015] Furthermore, a second spring is provided between the base and the push rod to elastically connect the two, so that the push rod can quickly move upward and reset after losing the pressure.

[0016] Furthermore, a fixed sheet is installed in the mounting seat, a hook spring is provided between the movable contact sheet and the fixed sheet to elastically connect the two, and a conversion sheet is provided between the fixed and movable contact sheets to movably connect the two.

[0017] The present invention proposes a push button switch, which is characterized in that after pressing the button, the baffle presses the push rod to move downward and pushes the moving contact piece to switch it to a state of contact with the normally open static contact piece. After that, whether the operator releases the button or continues to press the button, the baffle will release the pressure on the push rod, and at the same time, the push rod will no longer press the moving contact piece. The moving contact piece is driven to reset by elastic force and separate from the normally open static contact piece to disconnect the circuit. Compared with the existing push button switch, the present invention avoids the situation that the operator accidentally presses the button due to panic in an emergency, causing the circuit to fail to disconnect in time, and is safer and more reliable as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the push button switch in the present invention;

[0019] Figure 2 The internal structure of the push button switch in the present invention is shown in FIG. Figure 1 ;

[0020] Figure 3 The internal structure of the push button switch in the present invention is shown in FIG. Figure 2 ;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the base and the mounting seat in the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the base and related components in the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the baffle and the connecting column in the present invention;

[0024] Figure 7 The internal top view of the mounting groove in the present invention Figure 1 ;

[0025] Figure 8The internal top view of the mounting groove in the present invention Figure 2 ;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the cover plate in the present invention.

[0027] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0028] 1. Shell; 2. Mounting seat; 3. Button; 4. Baffle; 5. Sealing plate; 6. Cover plate; 11. Base; 12. Normally closed static contact; 13. Normally open static contact; 14. Moving contact; 15. Hook spring; 16. Fixed plate; 17. Converter plate; 21. Push rod; 22. Rod head; 23. Second spring; 24. Connecting column; 25. First guide plate; 26. First slot; 27. Connecting hole; 28. Connecting head; 29. ​​First guide surface; 31. Rod plug hole; 32. First spring; 33. First limit plate; 34. Second limit plate; 35. Limit block; 36. Mounting groove; 37. Protruding plate; 41. Stop head; 42. Second guide plate; 43. Annular plate; 44. Notch; 45. Second guide surface; 51. Second slot; 52. Sleeve; 53. External sealing groove; 61. First plug block; 62. Second plug block. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0030] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0032] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] like Figure 1 and Figure 5 As shown, it is a preferred embodiment of the present invention, a button 3 switch, including a shell 1, a base 11, a mounting seat 2, and a button 3 are arranged in the shell 1, a moving contact piece 14, a normally closed static contact piece 12, and a normally open static contact piece 13 are arranged on the base 11, the normally open static contact piece 13 is located above the normally closed static contact piece 12, and the moving contact piece 14 is located between the normally open static contact piece 13 and the normally closed static contact piece 12, the mounting seat 2 is fixedly installed on the base 11 and located below the button 3, a fixing piece 16 is installed in the mounting seat 2, a conversion piece 17 is movably provided at the bottom of the fixing piece 16, one end of the conversion piece 17 is movably engaged with the moving contact piece 14, a hook spring 15 elastically connecting the moving contact piece 14 and the fixing piece 16 is also provided between the moving contact piece 14 and the fixing piece 16, and a push rod 21 is also provided at the other end of the moving contact piece 14 to press on it, and the top of the push rod 21 passes through the mounting seat 2 upward. In the initial state, the contact point on the movable contact piece 14 is in contact with the normally closed static contact piece 12. After the push rod 21 moves downward, it will press one end of the movable contact piece 14 and move downward. The other end of the movable contact piece 14 will tilt upward and switch to contact with the normally open static contact piece 13. At the same time, the hook spring 15 is pulled downward and deformed, and the end of the movable piece close to the movable contact piece 14 also tilts upward.

[0035] Furthermore, if Figure 2-Figure 4 As shown, a connecting column 24 is fixedly provided on the mounting seat 2, a first guide plate 25 is provided at the bottom of the connecting column 24, a first guide surface 29 extending obliquely is provided on the first guide plate 25, a baffle 4 is movably sleeved on the connecting column 24 to block the top of the push rod 21, the baffle 4 is elastically connected to the button 3 in the horizontal direction and fixedly connected in the vertical direction, that is, the baffle 4 can move vertically with the button 3, as shown in FIG. Figure 6 As shown, a second guide plate 42 is provided at the bottom of the baffle 4 , and a second guide surface 45 extending obliquely is provided on the second guide plate 42 , and the second guide surface 45 is in contact with the first guide surface 29 in a matching manner.

[0036] After the operator presses the button 3 downward for the first time, the button 3 drives the baffle 4 to move downward. After the baffle 4 moves downward, it presses the push rod 21, causing it to move downward as well, thereby allowing the moving contact piece 14 to switch from contact with the normally closed static contact piece 12 to contact with the normally open static contact piece 13, thereby switching the circuit from disconnection to conduction; after the operator releases the button 3, the baffle 4 moves upward, the push rod 21 loses the pressure from the baffle 4, and no longer presses the moving contact piece 14. The moving contact piece 14 that loses the pressure is reset by the elastic force of the hook spring 15, and switches to a state of contact with the normally closed static contact piece 12, and the circuit is disconnected again.

[0037] When an unexpected situation occurs, the operator presses the button 3 more tightly, so that when the button 3 is pressed for the second time, the push rod 21 will continue to move downward, and the end of the movable contact piece 14 pressed by the push rod 21 will move further downward and maintain contact with the normally open static contact piece 13. The deformation of the hook spring 15 will further increase. In this process, the second guide plate 42 moves downward with the baffle 4 and the button 3. After that, the first guide plate 25 will contact the second guide surface 45 through the first guide surface 29, so that the second guide plate 42 moves downward. When one side rotates, the baffle 4 also rotates; the rotation amplitude of the baffle 4 is positively correlated with the distance the button 3 is pressed downward and moved. When the button 3 moves downward more than a certain distance, the baffle 4 will eventually rotate to break away from the obstruction of the push rod 21. After the push rod 21 loses the obstruction, it can no longer press the moving contact piece 14. The moving contact piece 14 that loses the pressure is driven by the elastic force of the hook spring 15 to reset, and at the same time, it pushes the push rod 21 to move upward, and then the moving contact piece 14 is converted to a state of being separated from the normally open static contact piece 13.

[0038] In this embodiment, if Figure 7-Figure 8 As shown, the button 3 is also provided with a mounting groove 36, wherein the bottom of the mounting groove 36 is provided with a rod socket 31 and a through hole passing therethrough, a rod head 22 is provided at the top of the push rod 21 and is inserted into the rod socket 31, the second guide plate 42 passes through the through hole downward, the connecting column 24 passes through the through hole upward and enters the mounting groove 36, and a stopper 41 is provided at the end of the baffle 4 to block the top of the rod socket 31. After the button 3 moves downward, the stopper 41 presses the rod head 22 to move downward, and after the baffle 4 rotates to drive the stopper 41 to disengage from the blocking rod socket 31, the push rod 21 loses the pressure from the baffle 4.

[0039] Furthermore, a protruding plate 37 and a first limiting plate 33 extending vertically upward are provided in the mounting groove 36. One side of the baffle 4 is elastically connected to the protruding plate 37 by a first spring 32, and the other side is blocked by the first limiting plate 33. After the button 3 is pressed and moved downward, the baffle 4 rotates toward the protruding plate 37, and the first spring 32 contracts. After the button 3 is released and moved upward, the baffle 4 is driven by the first spring 32 to rotate toward the first limiting plate 33. In particular, a second spring 23 elastically connecting the base 11 and the push rod 21 is provided between the base 11 and the push rod 21, so as to drive the push rod 21 to move upward more quickly after the push rod 21 loses the pressure of the baffle 4.

[0040] Furthermore, the baffle 4 is also provided with an annular plate 43, the annular plate 43 is provided with a notch 44, a second limiting plate 34 partially matched with the annular plate 43 is provided in the mounting groove 36, a limiting block 35 is provided on the second limiting plate 34, the annular plate 43 is installed below the limiting block 35 through the notch 44, when the button 3 is pressed downward, the limiting block 35 blocks above the annular plate 43 to prevent the baffle 4 from moving upward relative to the button 3, in this embodiment, the blocking block has been pre-set so that no matter how the button 3 is pressed downward, it will not rotate until the limiting block 35 is just above the notch 44.

[0041] In this embodiment, if Figure 4 As shown, the mounting base 2 is also provided with a connecting hole 27, and the bottom of the connecting column 24 is provided with a connecting head 28, and the connecting head 28 is threadedly connected to the connecting hole 27, so that the connecting column 24 can be detachably fixed on the mounting base 2. After the connecting column 24 is rotated upward, the first guide plate 25 will contact the second guide surface 45 through the first guide surface 29, so that the second guide plate 42 rotates to one side, and the rotated second guide plate 42 drives the baffle 4 to rotate toward the protruding plate 37 in advance by a certain angle. When the button 3 is pressed, since the first guide plate 25 on the connecting column 24 only moves slightly upward, the baffle 4 will still move the same angle as the button 3 moves downward, and because the baffle 4 has been rotated in advance by a certain angle, the required rotation angle for the baffle head 41 of the baffle 4 to disengage from the blocking of the rod insertion hole 31 is reduced, thereby reducing the required pressing distance for the moving contact piece 14 to separate from the normally open static contact piece 13 when the button 3 is pressed for the second time.

[0042] Similarly, after the connecting column 24 is screwed in reverse, the required pressing distance for the moving contact piece 14 to separate from the normally open static contact piece 13 can be increased when the button 3 is pressed for the second time, and the operator can adjust the required pressing distance for disconnecting the circuit when the button is pressed for the second time as needed. It should be particularly noted that although the second guide plate 42 also presses the first guide plate 25, the elastic force of the second spring 23 on the first guide plate 25 is much smaller than the friction force of the threaded connection of the first guide plate 25, so the connecting column 24 will not rotate directly during the pressing of the button 3.

[0043] Furthermore, if Figure 2 and Figure 3 As shown, a sealing plate 5 is also threadedly connected at the opening of the mounting groove 36, and a sleeve 52 movably sleeved on the outside of the connecting column 24 is provided at the bottom of the sealing plate 5. After the button 3 is moved downward, the connecting column 24 moves upward in the sleeve 52, and a first slot 26 located in the sleeve 52 is provided at the top of the connecting column 24, and a second slot 51 is provided at the top of the sealing plate 5. A practical tool compatible with the first slot 26 and the second slot 51 can be used to rotate the connecting column 24 and the sealing plate 5 respectively.

[0044] Furthermore, if Figure 2 and Fig. 9 As shown, an outer sealing groove 53 is provided above the sealing plate 5, and a cover plate 6 is fixedly provided on the top of the button 3. A first plug-in block 61 which is inserted into the outer sealing groove 53 and a second plug-in block 62 which is inserted into the second slot 51 are provided at the bottom of the cover plate 6 to separate the installation groove 36 from the outside.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A push button switch, comprising a housing (1), a base (11) and a button (3) being arranged in the housing (1), a moving contact piece (14), a normally closed static contact piece (12), and a normally open static contact piece (13) being arranged on the base (11), the moving contact piece (14) being in contact with the normally closed static contact piece (12), and a push rod (21) being drivingly connected to the moving contact piece (14), characterized in that: The base (11) is also fixedly provided with a mounting seat (2) located below the button (3); the movable contact piece (14) is elastically connected to the mounting seat (2); a connecting column (24) is fixedly provided on the mounting seat (2); a first guide plate (25) is provided at the bottom of the connecting column (24); a baffle (4) is movably sleeved on the connecting column (24) and blocks the top of the push rod (21); the baffle (4) is elastically connected to the button (3) and moves vertically with the button (3); a second guide plate (25) is provided at the bottom of the baffle (4) and contacts the first guide plate (25). The button (3) is pressed to drive the baffle plate (4) to move downward. After the baffle plate (4) moves downward, it pushes the push rod (21) to move downward and drives the moving contact piece (14) to switch to contact with the normally open static contact piece (13). After the button (3) is pressed further, the second guide plate (42) moves downward with the button (3) and is rotated to one side due to the resistance of the first guide plate (25). The baffle plate (4) rotates accordingly and releases the resistance to the push rod (21). After the moving contact piece (14) loses the resistance of the push rod (21), it is driven by the elastic force to separate from the normally open static contact piece (13).

2. The push button switch according to claim 1, characterized in that: The button (3) is also provided with a mounting groove (36), the bottom of the mounting groove (36) is provided with a rod insertion hole (31) extending therethrough, the top of the push rod (21) is provided with a rod head (22) inserted into the rod insertion hole (31), the connecting column (24) extends through the mounting groove (36), the baffle plate (4) is elastically connected to the mounting groove (36), and a baffle head (41) is provided at the end of the baffle plate (4) to block the top of the rod insertion hole (31).

3. The push button switch according to claim 2, characterized in that: A protruding plate (37) and a first limiting plate (33) are provided in the installation groove (36); one side of the baffle plate (4) is elastically connected to the protruding plate (37) via a first spring (32), and the other side is blocked by the first limiting plate (33).

4. The push button switch according to claim 3, characterized in that: The baffle plate (4) is further provided with an annular plate (43), the annular plate (43) is provided with a notch (44), a second limiting plate (34) partially matched with the annular plate (43) is provided in the mounting groove (36), and a limiting block (35) is provided on the second limiting plate (34) to block the annular plate (43).

5. The push button switch according to claim 1, characterized in that: The mounting seat (2) is provided with a connecting hole (27), and the bottom of the connecting column (24) is provided with a connecting head (28). The connecting head (28) is threadedly connected to the connecting hole (27) so as to detachably fix the connecting column (24) on the mounting seat (2). When the connecting column (24) is rotated, the baffle (4) is driven to rotate via the first guide plate (25).

6. The push button switch according to claim 4, characterized in that: A sealing plate (5) is also threadedly connected to the opening of the installation groove (36); a sleeve (52) is provided at the bottom of the sealing plate (5) and is sleeved on the outside of the connecting column (24); a first slot (26) is provided at the top of the connecting column (24); and a second slot (51) is provided at the top of the sealing plate (5).

7. The push button switch according to claim 6, characterized in that: An outer sealing groove (53) is provided above the sealing plate (5), a cover plate (6) is fixedly provided on the top of the button (3), and a first inserting block (61) which is inserted into the outer sealing groove (53) and a second inserting block (62) which is inserted into the second inserting slot (51) are provided at the bottom of the cover plate (6).

8. The push button switch according to claim 1, characterized in that: The first guide plate (25) is provided with a first guide surface (29) extending obliquely, and the second guide plate (42) is provided with a second guide surface (45) extending obliquely, and the first guide surface (29) is in contact with the second guide surface (45).

9. The push button switch according to claim 1, characterized in that: A second spring (23) is provided between the base (11) and the push rod (21) to elastically connect the two.

10. The push button switch according to claim 1, characterized in that: A fixing plate (16) is installed in the mounting seat (2), a hook spring (15) is provided between the movable contact plate (14) and the fixing plate (16) for elastically connecting the two, and a conversion plate (17) is provided between the fixed and movable contact plates (14) for movably connecting the two.

Images