A push-button switch

Abstract

The present invention discloses a push-button switch, comprising an outer shell and a button, wherein the outer shell is provided with a first contact piece group, a second contact piece group, and a driving block, wherein a pressing plate located above the driving block is elastically connected to the button, wherein a pressing rod, a first moving contact piece, and a first stationary contact piece are provided in the first contact piece group, wherein one end of the pressing rod is transmission-connected with the first moving contact piece, and the other end is located below the pressing plate, wherein the second contact piece group comprises a pressing block, a second moving contact piece, and a second stationary contact piece, wherein the pressing block is located below the button and is fixedly connected with the second moving contact piece. After pressing the button, the pressing plate moves downward with the button, and presses the pressing rod and the pressing block downward, so that the first moving contact piece and the first stationary contact piece are in contact, and the second moving contact piece and the second stationary contact piece are separated, and after continuing to press the button, the driving block drives the pressing plate to move and disengage from the pressing of the pressing rod, and the pressing rod moves and resets, and the first moving contact piece and the first stationary contact piece are separated.

Description

Technical Field

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

[0002] A push button switch is a switch device widely used in electrical automatic control circuits to manually send control signals to control contactors, relays, electromagnetic starters, etc. Its characteristic is that after pressing the button, the moving contact piece is driven to contact the static contact piece to realize the conduction of the circuit. If the button is kept pressed, the circuit conduction state is maintained. After the button is released, the moving contact piece is reset and separated from the static contact piece to realize the disconnection of the circuit.

[0003] However, when an accident or emergency occurs, after the operator presses the button to turn on the circuit, the operator may encounter unexpected mechanical movement of the load device connected to the circuit. In this case, the operator usually reflexively presses the switch more tightly, so that the circuit continues to remain in the on state, which may easily cause safety accidents or personal injury. Therefore, it is necessary to specifically design a push button switch that can disconnect the circuit after the button has been pressed, whether the button is released or pressed more tightly. Summary of the invention

[0004] The existing push-button switch turns on the circuit when the button is pressed and turns off the circuit when the button is released. When the operator encounters unexpected mechanical action, he or she may reflexively press the button tightly and fail to turn off the circuit, which may easily cause safety accidents or personal injuries. To solve this problem, the following invention is proposed:

[0005] A push button switch comprises an outer shell and a button, wherein at least one first contact piece group and at least one second contact piece group are arranged in the outer shell, the button is arranged above the first contact piece group and the second contact piece group, a driving block is also arranged in the outer shell, and a pressure plate located above the driving block is elastically connected to the button; a pressure rod, a first moving contact piece and a first stationary contact piece are arranged in the first contact piece group, one end of the pressure rod is transmission-connected with the first moving contact piece, and the other end is located below the pressure plate; the second contact piece group comprises a pressure block, a second moving contact piece and a second stationary contact piece, the pressure block is located below the button and is limit-connected with the second moving contact piece.

[0006] After the button is pressed downward, the pressure plate is driven to press the pressure rod downward, and after the pressure rod moves downward, it drives the first moving contact piece to move and contact the first static contact piece. The pressure block is also moved downward by the pressure of the button, and after the pressure block moves downward, it drives the second moving contact piece and the second static contact piece to separate. After the button is pressed downward, the pressure plate moves downward, and during the downward movement of the pressure plate, it is also pushed by the driving block to move horizontally, and the pressure on the pressure rod is released, the pressure rod moves and resets, and at the same time, the first moving contact piece and the first static contact piece are separated again.

[0007] Furthermore, a receiving groove is provided on the button, and the pressure plate is laterally elastically installed in the receiving groove. A block socket and a rod socket are provided at the bottom of the receiving groove. The block socket is located above the driving block and is partially blocked by the pressure plate. A pressure arm is also provided on the pressure plate and is located above the rod socket. The pressure rod is inserted into the rod socket and is located below the pressure arm.

[0008] After the button is pressed downward, the pressure arm presses the pressure rod to move downward, and the drive block is inserted into the block socket. After the button is pressed downward, the top of the drive block passes through the block socket and pushes the pressure plate to move horizontally. The pressure arm moves with the pressure plate to disengage from the pressure on the pressure rod, and the pressure rod resets upward.

[0009] Furthermore, a driving port is provided on one side of the pressing block, and a driving inclined surface extending toward the driving port is provided on the driving block. After the top of the driving block passes through the block insertion hole, the driving inclined surface pushes the pressing plate to move horizontally by contacting the driving port.

[0010] Furthermore, the first contact piece group also includes a base plate and a cover shell fixedly mounted on the base plate, the first stationary contact piece is arranged on the base plate, a transmission piece is movably arranged on the base plate, the transmission piece and the first movable contact piece are elastically connected by a hook spring, and the pressure rod abuts against the top of the transmission piece.

[0011] Furthermore, the second contact piece group also includes a base, the second stationary contact piece is arranged on the base, and the second moving contact piece is elastically connected to the base.

[0012] Furthermore, a partition is provided in the outer shell below the key, the drive block extends upward from the partition, the second contact piece group and the first contact piece group are arranged below the partition, and the pressure rod and the pressure block penetrate the partition upward.

[0013] Furthermore, a movable rod is provided in the outer shell, and the movable rod includes a rod body and rod heads located on both sides of the rod body. The rod body is pressed against the bottom surface of the key, and the rod head extends obliquely downward and is movably engaged with the partition. When the key is pressed downward, the rod body always presses against the bottom of the key to make the key pressing process smoother.

[0014] Furthermore, a limit block is fixedly provided on the button, and the limit block contacts the partition after the button moves downward; a push block is provided at the bottom of the button above the pressure block, and after the button moves downward, the push block presses the pressure block to move downward.

[0015] Furthermore, the button side is also provided with a movable plate extending downward, and the movable plate is elastically installed in the outer shell.

[0016] Furthermore, a cover plate is fixedly provided on the button, and the cover plate covers the receiving groove to prevent dust from entering the receiving groove.

[0017] The present invention proposes a push button switch, which has the beneficial effect that after the button is pressed, the first moving contact piece and the first stationary contact piece inside the push button are in contact, and the switch enters the on state. When unexpected mechanical movement occurs, the operator can separate the first moving contact piece and the first stationary contact piece regardless of whether the operator releases the button or presses the button more tightly, thereby allowing the switch to enter the off state, avoiding safety accidents or personal dangers. In addition, when there are multiple first contact pieces, after pressing the button, the pressure plate can quickly turn on or off all the first contact pieces at the same time, so that the states of the multiple first contact pieces are always synchronized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the split structure of the button switch in the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the push button switch in the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the push button switch in the present invention;

[0021] Figure 4 The internal structure of the push button switch of the present invention is shown in top view Figure 1 ;

[0022] Figure 5 The internal structure of the push button switch of the present invention is shown in top view Figure 2 ;

[0023] Figure 6 is a schematic diagram of the internal structure of the first contact group in the present invention;

[0024] Figure 7 is a schematic diagram of the three-dimensional structure of the second contact sheet group in the present invention;

[0025] Figure 8 is a schematic diagram of the cross-sectional structure of the button switch of the present invention when the button is not pressed;

[0026] Fig. 9is a schematic diagram of the cross-sectional structure of the button switch of the present invention after the button is pressed;

[0027] Fig.10 The figure is a schematic diagram of the cross-sectional structure of the button switch of the present invention after the button is pressed to the bottom.

[0028] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0029] 1. Outer shell; 2. Button; 3. Press plate; 4. First contact piece group; 5. Second contact piece group; 6. Movable rod; 11. Partition; 12. Pin; 13. Drive block; 14. Drive slope; 21. Accommodating groove; 22. Cover plate; 23. Block socket; 24. Rod socket; 25. Movable plate; 26. Push block; 31. Press arm; 32. Drive port; 33. Limit block; 41. Press rod; 42. Cover shell; 43. Bottom plate; 44. First static contact piece; 45. First moving contact piece; 46. Hook spring; 47. Transmission piece; 51. Press block; 52. Second static contact piece; 53. Second moving contact piece; 54. Base; 61. Rod head; 62. Rod body. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0031] 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.

[0032] 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.

[0033] In addition to being used to indicate a position or location relationship, some of the above terms may also be used to indicate other meanings. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figure 1-Figure 7 As shown, it is a preferred embodiment of the present invention, a push button switch, including an outer shell 1 and a button 2, wherein the outer shell 1 is provided with one or more first contact groups 4 and second contact groups 5. In this embodiment, the first contact groups 4 are provided with two, and the second contact groups 5 are provided with four. The button 2 is elastically provided in the outer shell 1 and is located above the first contact group 4 and the second contact group 5.

[0036] Furthermore, if Figure 3-Figure 5 As shown, a partition 11 is also provided in the outer shell 1, and a driving block 13 extending upward is provided on the top of the partition 11. The button 2 is arranged above the partition 11 and is elastically connected to the outer shell 1. A pressure plate 3 located above the driving block 13 is also elastically connected to the button 2. The first contact piece group 4 and the second contact piece group 5 are both arranged below the partition 11.

[0037] The first contact piece group 4 is provided with a pressure rod 41, a first moving contact piece 45, and a first stationary contact piece 44, wherein the first moving contact piece 45 is elastically connected to the first contact piece group 4, one end of the pressure rod 41 is drivingly connected to the first moving contact piece 45, and the other end is upwardly penetrated through the partition 11 and is located directly below the pressure plate 3; the second contact piece group 5 includes a pressure block 51, a second moving contact piece 53, and a second stationary contact piece 52, the bottom of the pressure block 51 is fixedly connected to the second moving contact piece 53, and the top of the pressure block 51 is upwardly penetrated through the partition 11 and is located below the key 2, wherein the second moving contact piece 53 is elastically installed in the second contact piece group 5. A plurality of pins 12 extending from the contacts are provided at the bottom of the first contact piece group 4 and the second contact piece group 5, and the pins 12 are electrically connected to the circuit system.

[0038] When button 2 is not pressed, the button switch status is as follows: Figure 8 As shown in the figure, the components of the second contact sheet group 5 and the pressure rod 41 in the first contact sheet group 4 are omitted. During use, after the operator presses the button 2 downward, the button 2 drives the pressure plate 3 to move downward together, such as Fig. 9As shown, after the pressure plate 3 moves downward, it presses the pressure rod 41 downward, thereby pushing the pressure rod 41 to move downward. The moved pressure rod 41 drives the first movable contact piece 45 to elastically move and contact the first static contact piece 44. At the same time, after the key 2 continues to move downward, it also presses the pressure block 51 downward to push it to move downward. After the pressure block 51 moves downward, it drives the second movable contact piece 53 to elastically move and separate from the second static contact piece 52. After the key 2 moves downward, the pressure block 51 also moves downward. After the key 2 is pressed downward, it presses the pressure rod 41 to move downward, and drives the first movable contact piece 45 to contact the first static contact piece 44, so as to finally realize the switching of the circuit state.

[0039] Normally, when the button 2 is released, the button 2 is driven by the elastic force to return to its original position and move upward, and the upward movement of the button 2 will also drive the pressure plate 3 to move upward together. After losing the pressure of the pressure plate 3 and the button 2, the pressure rod 41 and the pressure block 51 will also return to their original position and move upward, and finally the second moving contact piece 53 will contact the second static contact piece 52, the first moving contact piece 45 will separate from the first static contact piece 44, and the circuit state will switch to the initial disconnected state; however, after pressing the button 2, if the device connected to the circuit system takes unexpected action, the operator may reflexively press the button 2 downward more tightly, such as Fig.10 As shown, when the button 2 is further pressed downward, the pressing plate 3 will continue to move downward with the button 2. At this time, one side of the pressing plate 3 will be resisted by the driving block 13 and move horizontally. After the horizontal movement, the pressing plate 3 will be separated from the position directly above the pressure rod 41 and will no longer press it. The first moving contact piece 45 can drive the pressure rod 41 to move upward and reset, and separate from the first static contact piece 44, which will also put the circuit into the disconnected state. In addition, since the pressing plate 3 is separated from the pressure on the two pressure rods 41 at the same time, the disconnection process of the two first contact piece groups 4 is relatively synchronous and rapid.

[0040] In this embodiment, if Figure 1 As shown, the button 2 is provided with a receiving groove 21 and a cover plate 22 fixedly provided to cover the receiving groove 21, the pressure plate 3 is laterally elastically installed in the receiving groove 21 by a spring, a pressure arm 31 is provided at each end of the pressure plate 3, and a driving port 32 is also provided on the front side of the pressure plate 3. When the button 2 is not pressed, the front side of the pressure plate 3 is separated from the side wall of the button 2 by the driving port 32, and the driving block 13 is provided with a driving inclined surface 14 extending toward the driving port 32; a block plug hole 23 and a rod plug hole 24 are also provided through the bottom of the receiving groove 21 and are located below the pressure plate 3, wherein the block plug hole 23 is located above the driving block 13 and is partially blocked by the pressure plate 3, and the rod plug hole 24 is partially blocked by the pressure arm 31, and the pressure rod 41 is inserted into the portion of the rod plug hole 24 blocked by the pressure arm 31, that is, the top end of the pressure rod 41 is just located directly below the pressure arm 31.

[0041] When the button 2 is pressed downward, the pressure arm 31 first presses the pressure rod 41 to move downward, and the top of the driving block 13 is inserted into the block socket 23. After the button 2 is pressed downward, the top of the driving block 13 passes through the block socket 23, and the driving inclined surface 14 presses the driving port 32 to push the pressure plate 3 to move elastically laterally. The pressure arm 31 moves with the pressure plate 3 to disengage from the pressure on the pressure rod 41, and the pressure rod 41 resets upward to separate the first moving contact piece 45 and the first stationary contact piece 44.

[0042] In this embodiment, if Figure 1 and Figure 6 As shown, the first contact piece group 4 also includes a bottom plate 43 and a cover shell 42, which are fixedly connected by a slot and an insert block. The first static contact piece 44 is fixedly arranged on the bottom plate 43, and the first dynamic contact piece 45 is movably arranged on the bottom plate 43. A transmission piece 47 is also movably arranged on the bottom plate 43, and one end of the transmission piece 47 is tilted upward and abuts against the pressure rod 41 below the pressure rod 41. The transmission piece 47 and the first dynamic contact piece 45 are elastically connected through a hook spring 46. The pressure rod 41 abuts against the top of the transmission piece 47. After the pressure rod 41 moves downward, the end of the transmission piece 47 also moves downward, and drives the first dynamic contact piece 45 to turn through the hook spring 46 and contact the first static contact piece 44. Further, the side of the key 2 is also provided with a movable plate 25 extending downward, and the movable plate 25 is elastically connected to the side of the cover shell 42 through a spring, so that the key 2 is elastically connected to the outer shell 1.

[0043] In this embodiment, if Figure 7 As shown, the second contact piece group 5 also includes a base 54, the second static contact piece 52 is arranged on the base 54, the second movable contact piece 53 is elastically connected to the base 54 through a spring, and a push block 26 is provided at the bottom of the button 2 just above the pressure block 51. After the button 2 moves downward, the push block 26 presses the pressure block 51 to move downward to drive the second movable contact piece 53 and the first static contact piece 44 to separate.

[0044] like Figure 1As shown, in the present embodiment, a limit block 33 is fixedly provided on the button 2 and extends downward from the accommodating groove 21. When the button 2 is pressed until the second movable contact piece 53 is separated from the first movable contact piece 45 again, the limit block 33 contacts the partition 11 to prevent the button 2 from further moving downward and damaging the first contact piece group 4 or the second contact piece group 5; further, a movable rod 6 is provided between the button 2 and the partition 11, and the movable rod 6 includes a rod body 62 and a rod head 61 located on both sides of the rod body 62, and the rod body 62 abuts against the bottom surface of the button 2, and the rod head 61 extends obliquely downward and is movably engaged with the groove structure provided on the partition 11, and the movable rod 6 enables the button 2 to maintain a stable moving state during the pressing process.

[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 an outer shell (1) and a button (2), wherein at least one first contact sheet group (4) and at least one second contact sheet group (5) are arranged in the outer shell (1), and the button (2) is arranged above the first contact sheet group (4) and the second contact sheet group (5), characterized in that: A driving block (13) is also provided in the outer shell (1), and a pressure plate (3) located above the driving block (13) is elastically connected to the button (2); The first contact piece group (4) is provided with a pressure rod (41), a first movable contact piece (45), and a first stationary contact piece (44); one end of the pressure rod (41) is transmission-connected to the first movable contact piece (45), and the other end is located below the pressure plate (3); when the button (2) is pressed downward, the pressure plate (3) is driven to press the pressure rod (41) to move downward; when the pressure rod (41) moves, it drives the first movable contact piece (45) to move and contact the first stationary contact piece (44); The second contact piece group (5) comprises a pressing block (51), a second movable contact piece (53), and a second stationary contact piece (52); the pressing block (51) is located below the key (2) and is limit-connected to the second movable contact piece (53); when the key (2) is pressed downward, the pressing block (51) moves downward, and the second movable contact piece (53) moves along with the pressing block (51) to separate from the second stationary contact piece (52); After the button (2) is continuously pressed downward, the pressure plate (3) moves downward and is pushed by the driving block (13) to release the pressure on the pressure rod (41), and the pressure rod (41) moves to reset, while the first moving contact piece (45) is separated from the first stationary contact piece (44).

2. The push button switch according to claim 1, characterized in that: The button (2) is provided with a receiving groove (21), the pressing plate (3) is laterally elastically installed in the receiving groove (21), a block insertion hole (23) and a rod insertion hole (24) are provided at the bottom of the receiving groove (21), the block insertion hole (23) is located above the driving block (13) and is partially blocked by the pressing plate (3), and a pressing arm (31) is also provided on the pressing plate (3) and is located above the rod insertion hole (24), and the pressing rod (41) is inserted into the rod insertion hole (24) and is located at the pressing arm (31), after the button (2) is pressed downward, the pressure arm (31) presses the pressure rod (41) downward, and the drive block (13) is inserted into the block socket (23). After the button (2) is pressed downward, the top of the drive block (13) penetrates through the block socket (23) and pushes the pressure plate (3) to move horizontally. The pressure arm (31) moves with the pressure plate (3) and is disengaged from the pressure on the pressure rod (41), and the pressure rod (41) is reset upward.

3. The push button switch according to claim 2, characterized in that: A driving opening (32) is provided on one side of the pressing block (51), and a driving inclined surface (14) extending toward the driving opening (32) is provided on the driving block (13). After the top of the driving block (13) passes through the block insertion hole (23), the driving inclined surface (14) contacts the driving opening (32) to allow the pressing plate (3) to move horizontally.

4. The push button switch according to claim 3, characterized in that: The first contact piece group (4) further comprises a bottom plate (43) and a cover shell (42) fixedly mounted on the bottom plate (43); the first stationary contact piece (44) is arranged on the bottom plate (43); a transmission piece (47) is movably arranged on the bottom plate (43); the transmission piece (47) is elastically connected to the first movable contact piece (45) via a hook spring (46); and the pressure rod (41) abuts against the top of the transmission piece (47).

5. The push button switch according to claim 4, characterized in that: The second contact piece group (5) further comprises a base (54), the second stationary contact piece (52) is arranged on the base (54), and the second movable contact piece (53) is elastically connected to the base (54).

6. The push button switch according to claim 1, characterized in that: A partition (11) is also provided in the outer shell (1) and is located below the key (2). The drive block (13) extends upward from the partition (11). The second contact sheet group (5) and the first contact sheet group (4) are provided below the partition (11), wherein the pressure rod (41) and the pressure block (51) penetrate the partition (11) upward.

7. The push button switch according to claim 6, characterized in that: A movable rod (6) is also provided in the outer shell (1), the movable rod (6) comprising a rod body (62) and rod heads (61) located on both sides of the rod body (62), the rod body (62) abuts against the bottom surface of the key (2), and the rod head (61) extends obliquely downward and is movably engaged with the partition (11).

8. The push button switch according to claim 6, characterized in that: A limit block (33) is also fixedly provided on the button (2), and the limit block (33) contacts the partition plate (11) after the button (2) moves downward. A push block (26) is provided at the bottom of the button (2) and is located above the pressing block (51). After the button (2) moves downward, the push block (26) presses the pressing block (51) to move downward.

9. The push button switch according to claim 1, characterized in that: A movable plate (25) extending downward is also provided on the side of the button (2), and the movable plate (25) is elastically mounted in the outer shell (1).

10. The push button switch according to claim 1, characterized in that: A cover plate (22) is also fixedly provided on the button (2), and the cover plate (22) covers the receiving groove (21).

Images