Push button switch with adjustable pressing stroke

Abstract

The present invention discloses a push button switch with adjustable pressing stroke, comprising a housing, the housing is provided with a base and a button, a moving contact piece, a first static contact piece, and a second static contact piece are provided on the base, the moving contact piece contacts the first static contact piece, the button is provided with a connecting hole and a first limit block threadedly connected in the connecting hole, a first limit plate is provided at the bottom of the first limit block, a movable push block is transmission-connected above the moving contact piece, the push block abuts against the bottom of the first limit plate, after the button is pressed and moved downward, the first limit plate will be driven to press the push block and move downward together, and after the push block moves, the moving contact piece is driven to switch to contact with the second static contact piece. The beneficial effect of the present invention is that after the first limit plate is screwed downward, the push block moves downward in advance, thereby shortening the required pressing distance for the subsequent button to be pressed until the moving contact piece contacts the second static contact piece, thereby achieving the purpose of adjusting the pressing stroke of the push button switch.

Description

Technical Field

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

[0002] Push button switch is a common manual control appliance, mainly used for on-off control in circuits. Push button switches are widely used in various devices and systems, such as household appliances, industrial control systems, electronic equipment, etc.

[0003] A push button switch usually includes a button, a moving contact piece, and a stationary contact piece, wherein the moving contact piece is elastically installed in the switch. When the button is pressed, the moving contact piece will be pushed to switch position until it contacts the stationary contact piece. After the moving contact piece and the stationary contact piece contact, the circuit will be switched from the disconnected state to the connected state. After the button is released, the moving contact piece will be driven by the elastic force to reset and finally separate from the stationary contact piece. At this time, the circuit will switch back from the connected state to the connected state. In this process, the distance required to press the button until the moving contact piece contacts the stationary contact piece is called the pressing stroke of the push button switch.

[0004] In actual use, the suitable pressing stroke of the button switch may change according to different use occasions and people. For example, a shorter pressing stroke can increase the activation speed of the button switch and is more suitable for the elderly, while a longer pressing stroke can reduce the possibility of the button switch being activated by accidental touch, thereby improving safety. However, the existing button switch, that is, the length of the pressing stroke is only related to the specific internal structure of the button switch and cannot be adjusted. The operator can only change the pressing stroke by replacing the button switch, which is inconvenient. Summary of the invention

[0005] In the existing push button switch, the operator cannot adjust the pressing stroke of the push button switch according to the use occasion and the different personnel to meet the actual needs. To solve this problem, the following invention is proposed:

[0006] A push button switch with adjustable pressing stroke comprises a shell, the shell is provided with a base and a button elastically connected to the base, a moving contact piece, a first static contact piece and a second static contact piece are provided on the base, the moving contact piece is in contact with the first static contact piece, a connecting hole is provided on the button, a first limit block is threadedly connected in the connecting hole, a first annular limit plate is provided at the bottom of the first limit block, a movable push block is transmission-connected above the moving contact piece, the push block is also elastically connected to the base, and the first limit plate is pressed against the top of the push block.

[0007] After the button is pressed and moves downward, the first limit plate will be driven to press the push block and move downward together. After the push block moves, it will drive the movable contact piece to switch to contact with the second stationary contact piece. After the first limit plate is rotated downward, it will press the push block to move downward for a distance in advance, thereby shortening the required pressing distance for the movable contact piece to move to contact with the second stationary contact piece when the button is pressed subsequently, and finally achieving the purpose of changing the pressing stroke of the button switch.

[0008] Furthermore, a pushed plate is provided on one side of the push block for abutting against the bottom of the first limit block; the movable contact piece is elastically connected to a movable piece through a hook spring, and the movable piece abuts against the bottom of the push block. After the push block moves downward, it pushes the movable piece to move downward and drives the movable contact piece to switch to contact with the second static contact piece.

[0009] Furthermore, it also includes a mounting seat arranged between the button and the base, the mounting seat is provided with a connecting column, the threaded sleeve on the connecting column is provided with a second limit block, and the bottom of the second limit block is provided with a second limit plate located below the pushed plate. After the button is pressed until the pushed plate contacts the second limit plate, the push block can no longer move downward to avoid the button switch being accidentally activated.

[0010] Furthermore, a sealing groove connected to the connecting hole is provided on the top of the button, and a first slot inserted into the sealing groove is provided on the top of the first limiting block, and the first limiting block can be rotated using a tool matching the first slot.

[0011] Furthermore, the first limit block is provided with a socket and a through hole, the second limit block is movably inserted into the socket, and a second slot located in the through hole is provided at the top of the second limit block, and the through hole extends from the top of the first limit block to the socket to connect the second slot with the sealing groove. Similarly, the second limit block can be rotated using a tool that matches the second slot.

[0012] Furthermore, a driving plate is fixedly connected to the bottom of the button, a driving arm is provided on one side of the driving plate, and the driving arm and the push block are elastically connected to the base through a spring. After releasing the button, the spring elastically pushes the driving arm and the push block to reset upward.

[0013] Furthermore, a guide groove is provided on the mounting seat, and guide plates matching the guide groove are provided on both sides of the push block. After the push block is pressed down by the first limiting plate, it moves vertically downward along the guide groove.

[0014] Furthermore, a cover plate is provided on the top of the button, a sealing block is provided on the cover plate and is inserted into the sealing groove, an insert block is provided at the bottom of the sealing block and is inserted into the through hole, and the cover plate separates the sealing groove and the through hole from the outside to prevent dust from entering.

[0015] Furthermore, a pull cover is provided on the top of the cover plate, and a curved surface spaced apart from the button is provided on the periphery of the pull cover, and the cover plate can be pulled out of the sealing groove by pulling the curved surface.

[0016] The present invention proposes a push button switch with adjustable pressing stroke. By rotating the first limit block and the second limit block, the position of the first limit plate or the second limit plate on the upper and lower sides of the push block can be adjusted. After adjusting the position of the first limit plate, the push block can be pushed downward for a certain distance in advance to shorten the pressing distance required for the moving contact piece to switch to contact with the second static contact piece when the button is pressed subsequently, thereby achieving the purpose of changing the pressing stroke of the button switch. After adjusting the position of the second limit plate, the push block can be restricted from moving downward to avoid activating the switch due to accidentally touching the button. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the push button switch in the present invention;

[0018] Figure 2 The internal structure of the push button switch in the present invention is shown in FIG. Figure 1 ;

[0019] Figure 3 The internal structure of the push button switch in the present invention is shown in FIG. Figure 2 ;

[0020] Figure 4 The schematic diagram of the partial structure of the button switch in the present invention is as follows Figure 1 ;

[0021] Figure 5 The schematic diagram of the partial structure of the button switch in the present invention is as follows Figure 2 ;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the first limiting block in the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the cover plate in the present invention.

[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0025] 1. Base; 2. Mounting seat; 3. Button; 4. Drive plate; 5. First limit block; 6. Second limit block; 7. Cover plate; 8. Shell; 11. Moving contact piece; 12. First static contact piece; 13. Second static contact piece; 14. Hook spring; 15. Movable piece; 21. Push block; 22. Push plate; 23. Push foot; 24. Connecting column; 25. Guide plate; 26. Guide groove; 31. Connecting hole; 32. Sealing groove; 41. Drive arm; 42. Spring; 51. First limit plate; 52. First slot; 53. Plug hole; 54. Through hole; 61. Second limit plate; 62. Second slot; 71. Sealing block; 72. Plug block; 73. Pull cover; 74. Arc surface. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1-Figure 5As shown, it is a preferred embodiment of the present invention, a push button switch with adjustable pressing stroke, comprising a shell 8, a base 1 and a button 3 are arranged in the shell 8, a driving plate 4 is fixedly connected to the bottom of the button 3, a driving arm 41 is arranged on one side of the driving plate 4, the driving arm 41 is elastically connected to the base 1 through a spring 42, a moving contact piece 11, a first static contact piece 12, and a second static contact piece 13 are arranged on the base 1, one end of the moving contact piece 11 is in contact with the first static contact piece 12, the second static contact piece 13 is located below the moving contact piece 11, and a movable push block 21 is transmission-connected to the top of the other end, the push block 21 is also elastically connected to the base 1 through a spring 42, a connecting hole 31 is also arranged on the button 3, a first limit block 5 is threadedly connected in the connecting hole 31, a first ring-shaped limit plate 51 is arranged at the bottom of the first limit block 5, and the first limit plate 51 is pressed against the top of the push block 21.

[0031] After the button 3 is pressed downward and moved for a distance, the button 3 will drive the first limit block 5 to move downward together. During the downward movement of the first limit block 5, the first limit plate 51 will press the push block 21 to make it move downward together. After the push block 21 moves downward, it drives the moving contact piece 11 to switch from contact with the first static contact piece 12 to contact with the second static contact piece 13, completing the state switching of the button switch. After releasing the button 3, the push block and the button 3 are pushed by the spring 42 to move upward and reset, the moving contact piece 11 also moves and resets and contacts with the first static contact piece 12 again, and the state of the button switch is switched again.

[0032] Under normal conditions, the first limit block 5 is completely screwed into the connecting hole 31, and the pressing distance required for pressing the button 3 until the moving contact piece 11 contacts the second stationary contact piece 13 reaches a maximum, that is, the pressing stroke of the button switch also reaches a maximum at this time. After the first limit block 5 is screwed downward, the first limit plate 51 also moves downward and presses the push block 21 to move downward. The push block 21 will move downward by the same distance as the first limit block 5 is screwed downward. At this time, since the push block 21 has been pressed by the first limit plate 51 and has moved downward for a distance in advance, the pressing distance required for pressing the button 3 until the moving contact piece 11 contacts the second stationary contact piece 13 will also be shortened, thereby shortening the pressing stroke of the button switch.

[0033] Furthermore, if Figure 4-Figure 5As shown, a push plate 22 extending laterally inward is also provided on one side of the push block 21, and the push plate 22 abuts against the bottom of the first limit block 5. A leg extending downward is provided at the bottom of the push block 21, and the movable contact piece 11 is elastically connected to the movable piece 15 through a hook spring 14. One end of the movable piece 15 is movably clamped on the base 1, and the other end abuts against the bottom of the push foot 23. After the button 3 is pressed downward, the first limit plate 51 pushes the push block 21 to move downward, and the push block 21 pushes one end of the movable piece 15 to move downward, and the hook spring 14 connected to the movable piece 15 is deformed immediately, until the deformation of the hook spring 14 exceeds a certain amplitude, and the elastic force of the hook spring 14 drives the movable contact piece 11 to switch to contact with the second static contact piece 13. After the button 3 is released, the movable contact piece 11 and the movable piece 15 are driven by the elastic force of the hook spring 14 to move and reset.

[0034] In this embodiment, a mounting seat 2 is further provided between the button 3 and the base 1, and a connecting column 24 and a guide groove 26 are provided on the mounting seat 2, and guide plates 25 matching the guide groove 26 are provided on both sides of the push block 21; Figure 4-Figure 5 As shown, the outer threaded sleeve of the connecting column 24 is provided with a second limit block 6, and the bottom of the second limit block 6 is provided with a second limit plate 61 located below the thrust plate 22. In a normal state, the second limit block 6 is not screwed upward, and at this time, the second limit plate 61 is located in the groove structure on the mounting seat 2.

[0035] After the second limit block 6 is screwed upward, the second limit plate 61 also moves upward. After that, in the process of pressing the button 3 to drive the push block 21 to move downward, the pushed plate 22 will be blocked by the second limit plate 61, causing the push block 21 to stop moving downward. When the second limit block 6 moves upward more than a certain distance, the push block 21 cannot move downward to allow the moving contact piece 11 to switch to contact with the second static contact piece 13, avoiding the switching of the button switch state due to accidental touch. It is only suitable for occasions where the device controlled by the button switch does not need to be started.

[0036] Furthermore, a sealing groove 32 connected to the connecting hole 31 is provided at the top of the button 3, and a first slot 52 inserted into the sealing groove 32 is provided at the top of the first limiting block 5. After a tool matching the first slot 52 is inserted, the first limiting block 5 can be rotated to control its movement in the connecting hole 31; Figure 6As shown, a socket 53 and a through hole 54 are provided on the first limit block 5, the end of the second limit block 6 is movably inserted into the socket 53, and a second hexagonal slot 62 is provided on the top of the second limit block 6, the second slot 62 is located in the socket 53, and the through hole 54 passes through the top of the first limit block 5 to the socket 53 to connect the second slot 62 with the sealing groove 32, and a tool that passes through the through hole 54 and is compatible with the second slot 62 can rotate the second limit block 6 to control its movement on the connecting column 24.

[0037] In this embodiment, if Figure 1 and Figure 7 As shown, a cover plate 7 is also provided on the top of the button 3, wherein a sealing block 71 and a pull cover 73 are respectively provided at the bottom and the top of the cover plate 7, and the sealing cover is snugly inserted into the sealing groove 32, and an insert block 72 is provided at the bottom of the sealing block 71 to be inserted into the through hole 54 so as to separate the insertion hole 53 and the sealing groove 32 from the outside world, and an arc surface 74 is provided on the periphery of the pull cover 73 to be separated from the top surface of the button 3. When the first limit plate 51 and the second limit plate 61 need to be screwed in and out, the cover plate 7 can be quickly removed by pulling the arc surface 74.

[0038] 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 with adjustable pressing stroke, comprising a housing (8), the housing (8) being provided with a base (1) and a button (3) elastically connected to the base (1), a moving contact piece (11), a first stationary contact piece (12), and a second stationary contact piece (13) being provided on the base (1), the moving contact piece (11) being in contact with the first stationary contact piece (12), characterized in that: The button (3) is provided with a connecting hole (31), a first limiting block (5) is threadedly connected to the connecting hole (31), a first limiting plate (51) in an annular shape is provided at the bottom of the first limiting block (5), a movable push block (21) is transmission-connected above the moving contact piece (11), the push block (21) is also elastically connected to the base (1), the first limiting plate (51) is pressed against the top of the push block (21), after the button (3) is pressed and moved downward, the first limiting plate (51) presses the push block (21) downward, after the push block (21) moves downward, the moving contact piece (11) is switched to contact with the second stationary contact piece (13), after the first limiting plate (51) is screwed downward, the first limiting plate (51) pre-presses the push block (21) downward, so as to shorten the required pressing distance for the moving contact piece (11) to contact with the second stationary contact piece (13) when the button (3) is subsequently pressed; A push plate (22) is also provided on one side of the push block (21) for abutting against the bottom of the first limit block (5); the movable contact piece (11) is elastically connected to the movable piece (15) via a hook spring (14); the movable piece (15) abuts against the bottom of the push block (21); when the push block (21) moves downward, it pushes the movable piece (15) to move downward, and drives the movable contact piece (11) to switch to contact with the second stationary contact piece (13).

2. The push button switch according to claim 1, characterized in that: The invention also comprises a mounting seat (2) arranged between the button (3) and the base (1), the mounting seat (2) being provided with a connecting column (24), the threaded sleeve on the connecting column (24) being provided with a second limit block (6), the bottom of the second limit block (6) being provided with a second limit plate (61) located below the push plate (22), and after the button (3) is pressed until the push plate (22) contacts the second limit plate (61), the push block (21) can no longer move downward.

3. The push button switch according to claim 2, characterized in that: The button (3) is provided at the top with a sealing groove (32) which is in communication with the connection hole (31), and the first limiting block (5) is provided at the top with a first slot (52) which is inserted into the sealing groove (32).

4. The push button switch according to claim 3, characterized in that: The first limiting block (5) is provided with an insertion hole (53) and a through hole (54); the second limiting block (6) is movably inserted into the insertion hole (53); a second slot (62) located in the through hole (54) is provided at the top of the second limiting block (6); the through hole (54) penetrates from the top of the first limiting block (5) to the insertion hole (53) so as to connect the second slot (62) with the sealing groove (32).

5. The push button switch according to claim 1, characterized in that: The bottom of the button (3) is fixedly connected to a driving plate (4), one side of the driving plate (4) is provided with a driving arm (41), and the driving arm (41) and the push block (21) are elastically connected to the base (1) via a spring (42).

6. The push button switch according to claim 2, characterized in that: The mounting seat (2) is also provided with a guide groove (26), and guide plates (25) matching the guide groove (26) are provided on both sides of the push block (21).

7. The push button switch according to claim 4, characterized in that: The button (3) is also provided with a cover plate (7) on the top, and a sealing block (71) is provided on the cover plate (7) and is inserted into the sealing groove (32). The bottom of the sealing block (71) is provided with an insert block (72) that is inserted into the through hole (54).

8. The push button switch according to claim 7, characterized in that: A pull cover (73) is also provided on the top of the cover plate (7), and an arc-shaped surface (74) spaced apart from the button (3) is provided on the periphery of the pull cover (73).

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