A micro switch

Abstract

The present invention discloses a micro switch, including a base and a shell installed on the base, the base is provided with a moving contact piece and a normally closed static contact piece and a normally open static contact piece located at the upper and lower sides of the moving contact piece, the moving contact piece is elastically connected with a hook spring, a trigger rod is movably provided on the shell, a driving head located above the hook spring is provided at the bottom of the trigger rod, a clamping member and a driving rod are provided in the shell, a clamping groove is provided at the connection between the driving head and the trigger rod, one end of the clamping member is transmission-connected to the clamping groove, and the other end is transmission-connected to the driving rod, the driving rod can rotate relative to the clamping member, and the driving rod is also threadedly connected to a connecting hole penetrating the shell. The beneficial effect of the present invention is that after the driving rod rotates in the connecting hole, it drives the clamping member and the trigger rod to move horizontally together, thereby changing the position of the trigger rod, so that the user can make adaptive adjustments according to the usage scenario.

Description

Technical Field

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

[0002] A micro switch, also known as a precision limit switch or a sensitive switch, is an electrical switch that can perform fast switching actions. It is widely used in various devices, such as home appliances, electronic products, mechanical equipment, and automobiles to achieve functions such as position detection, safety protection, and operation control.

[0003] A moving contact piece, a normally open static contact piece, and a normally closed static contact piece are arranged in the shell of the micro switch, and a movable trigger rod is arranged on the top of the shell. An elastic mechanism connected to the moving contact piece is generally arranged under the trigger rod. After the user presses the trigger rod, the elastic mechanism is driven by the trigger rod to deform, thereby driving the moving contact piece to switch from contact with the normally open static contact piece to contact with the normally closed static contact piece to complete the switching action. The time required for the switching action is positively correlated with the trigger rod and the distance between the trigger rod and the elastic mechanism.

[0004] However, in actual use, it is found that the existing micro switches have the following defects: (1) The position of the trigger rod cannot be adjusted in advance, which makes it inconvenient to select a suitable position to press the trigger rod according to the needs of the actual product; (2) The distance between the trigger rod and the elastic mechanism cannot be adjusted by any means other than pressing, and the time required to drive the elastic mechanism to deform when the trigger rod is pressed cannot be changed according to the product usage scenario. In summary, the existing micro switches cannot adaptively adjust the position of the trigger rod and the time required to press according to the actual usage scenario, which is quite inconvenient. Summary of the invention

[0005] The existing micro switch cannot pre-adjust the position of the trigger rod or the distance between the trigger rod and the elastic mechanism, which is not convenient for adaptive adjustment to different usage scenarios. To solve this problem, the following invention is proposed:.

[0006] A micro switch includes a base and a shell mounted on the base, wherein a moving contact piece and a normally closed static contact piece and a normally open static contact piece located at the upper and lower sides of the moving contact piece are provided on the base, the moving contact piece is elastically connected with a hook spring, a trigger rod is movably provided on the shell, a driving head located above the hook spring is provided at the bottom of the trigger rod, a clamping member and a driving rod are provided in the shell, a clamping groove is provided at the connection between the driving head and the trigger rod, one end of the clamping member is transmission-connected with the clamping groove, and the other end is transmission-connected with the driving rod, the driving rod can rotate relative to the clamping member, and the driving rod is also threadedly connected with a connecting hole penetrating the shell. After pressing the trigger rod, the trigger rod drives the driving head to move downward to press the hook spring to deform it, and then the hook spring drives the moving contact piece to switch from the normally closed static contact piece to the normally open static contact piece, and after the driving rod rotates in the connecting hole, it drives the clamping member and the trigger rod to move horizontally together to change the position of the trigger rod, and the user can adjust it according to needs.

[0007] Furthermore, the clamping member includes a first clamping block and a second clamping block, the first clamping block is provided with a first clamping claw, the second clamping block is provided with a second clamping claw, and the first clamping claw and the second clamping claw are both engaged in the clamping groove to transmission connect the clamping member and the clamping groove.

[0008] Furthermore, the driving rod is provided with a cross groove on the end face of one end of the connecting hole, and a ring-shaped transmission groove is provided on the other end. The first clamping block and the second clamping block are both provided with transmission blocks that are movably engaged in the transmission groove, so as to realize the transmission connection between the clamping member and the driving rod in the horizontal direction, and the driving rod can rotate relative to the clamping member.

[0009] Furthermore, the first clamping block is provided with a fixing column, the second clamping block is provided with a fixing hole, and the fixing column is inserted into the fixing hole to fix the first clamping block and the second clamping block.

[0010] Furthermore, the driving head is provided with a socket, a pressure rod is connected to the inner thread of the socket, an operation port is provided on the trigger rod, a pressure head is provided at one end of the pressure rod, the pressure head is provided between the hook spring and the driving head, and a rotating head is provided at the other end, which contacts the outside through the operation port. After the rotating head rotates, the pressure rod moves vertically in the socket to change the distance between the pressure head and the hook spring. After pressing, the trigger rod drives the pressure head to press the hook spring and deform it. When the distance between the pressure head and the hook spring changes and the hook spring is deformed, the required pressing distance and pressing time of the trigger rod change, and the user can select the moving distance of the pressure rod according to the needs.

[0011] Furthermore, a rod cover is fixedly provided on the top of the trigger rod, a vertically extending positioning column is provided on the rod cover, a positioning hole is provided on the pressure rod for the positioning column to be movably inserted, a matching ring is provided on the pressure head, and a matching groove matching the matching ring is provided around the socket.

[0012] Furthermore, the housing also includes a main shell and a cover plate, the main shell is provided with a plug-in slot, and the cover plate is provided with a plug-in plate that fits into the plug-in slot to fix the main shell and the cover plate.

[0013] Furthermore, sliding bars are provided on the inner side walls of the main shell and the cover plate, and sliding grooves movably engaged with the sliding bars are provided on both sides of the driving head. After the driving head rotates in the connecting hole, the driving head moves horizontally along the sliding bar through the sliding grooves.

[0014] Furthermore, a stopper is provided on the inner side wall of the main shell and the cover plate to block the bottom of the driving head, and the stopper prevents the driving head from moving downward and disengaging from the sliding bar.

[0015] Furthermore, the rotating head is provided with a plurality of groove structures extending vertically and arranged in a ring shape, so that when the operator rotates the rotating head, the contact friction between the operator and the rotating head is increased.

[0016] The present invention proposes a micro switch, which has the following beneficial effects: (1) By rotating the driving rod, the position of the trigger rod can be moved horizontally, and the user can adjust the position of the pressed trigger rod according to actual needs; (2) By rotating the pressing rod, the distance between the pressure head and the hook spring can be adjusted, thereby changing the moving distance and moving time when the trigger rod is pressed, and the user can also adjust the time required to press the trigger rod according to actual needs. In summary, the present invention provides a micro switch that can adaptively adjust its trigger rod according to the usage scenario, thereby overcoming the shortcomings of existing micro switches. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 Schematic diagram of the internal structure of the micro switch in the present invention;

[0019] Figure 3 It is a partial structural schematic diagram of the micro switch in the present invention;

[0020] Figure 4 It is a schematic diagram of the combined structure of the trigger rod and the clamping member in the present invention;

[0021] Figure 5 It is a schematic diagram of the split structure of the clamping member and the driving rod in the present invention;

[0022] Figure 6 It is a schematic diagram of the split structure of the trigger rod and the pressure rod in the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the trigger rod in the present invention;

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the main shell in the present invention.

[0025] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0026] 1. Shell; 2. Trigger rod; 3. Clamping piece; 4. Driving rod; 5. Pressure rod; 6. Main shell; 7. Cover plate; 8. Connecting hole; 11. Base; 12. Moving contact piece; 13. Hook spring; 14. Normally open static contact piece; 15. Normally closed static contact piece; 16. Pin; 17. Sliding bar; 18. Stopper; 19. Moving hole; 21. Driving head; 22. Sliding groove; 23. Clamping groove; 24. Rod cover; 25 , positioning column; 26, socket; 27, operating port; 28, matching groove; 31, first clamping block; 32, second clamping block; 33, first clamping claw; 34, second clamping claw; 35, transmission block; 36, fixing column; 37, fixing hole; 41, transmission groove; 42, cross groove; 51, pressure head; 52, rotating head; 53, positioning hole; 54, matching ring; 61, plug-in slot; 71, plug-in board. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1-Figure 3 As shown, it is a preferred embodiment of the present invention, a micro switch, including a base 11 and a housing 1, a moving contact piece 12, a normally closed static contact piece 15, and a normally open static contact piece 14 are provided on the base 11, and the three contacts are connected to a pin 16 that penetrates the base 11, the normally closed static contact piece 15 and the normally open static contact piece 14 are respectively located on the upper and lower sides of the moving contact piece 12, and the moving contact piece 12 is also elastically connected to the pin 16 through a hook spring 13, and the housing 1 is fixedly mounted on the base 11, All the contacts are covered therein, and an oblong moving hole 19 is provided on the top of the shell 1. A trigger rod 2 is movably provided in the moving hole 19 and penetrates to the outside of the shell 1. A driving head 21 is provided at the bottom of the trigger rod 2 and is located above the hook spring 13. After the trigger rod 2 is pressed, it is driven to move vertically downward and contact the hook spring 13 to deform it. The moving contact piece 12 is driven by the hook spring 13 and switches from contacting the normally closed static contact piece 15 to contacting the normally open static contact piece 14.

[0033] Furthermore, if Figure 4-Figure 6 As shown, a clamping member 3 and a driving rod 4 are further provided between the shell 1 and the base 11, and an annular clamping groove 23 is provided between the driving head 21 and the trigger rod 2. One end of the clamping member 3 is transmission-connected to the clamping groove 23, and the other end is transmission-connected to the driving rod 4. The transmission connection method here is that when the driving rod 4 moves horizontally, it will drive the clamping member 3 to move together, but when the driving rod 4 rotates, it will only rotate independently relative to the clamping member 3. A penetrating connecting hole 8 is also provided on the side of the shell 1, and the driving rod 4 is threadedly connected to the connecting hole 8.

[0034] The state of the micro switch can be switched by pressing the trigger rod 2. When the position of the trigger rod 2 needs to be changed, the driving rod 4 only needs to be screwed in or out through the connecting hole 8. During the screwing in and out process of the driving rod 4, the clamping member 3 will not be driven to rotate together, but it will be driven to move horizontally together. After the clamping member 3 moves, it drives the trigger rod 2 to move horizontally along the moving hole 19 through the clamped groove 23, so that the user can change the position of the trigger rod 2 according to actual needs.

[0035] In this embodiment, if Figure 5As shown, the clamping member 3 includes a first clamping block 31 and a second clamping block 32, the first clamping block 31 is provided with a first clamping claw 33, the second clamping block 32 is provided with a second clamping claw 34, the first clamping claw 33 and the second clamping claw 34 are semicircular as a whole, and are respectively engaged with one side of the clamped groove 23, and after both are engaged with the clamped groove 23, the clamping member 3 and the clamped groove 23 are connected by transmission; further, the drive rod 4 is provided with a cross groove 42 on the end surface of one end of the connecting hole 8, and a ring-shaped transmission groove 4 is provided on the other end. 1, a semicircular transmission block 35 is provided on the inner side of the first clamping block 31 and the second clamping block 32, and the transmission block 35 is movably engaged in the transmission groove 41 to realize the transmission connection between the driving rod 4 and the clamping member 3 in the horizontal direction, and the driving rod 4 can rotate relative to the clamping member 3; further, a plurality of fixing columns 36 are provided on the first clamping block 31, and a plurality of fixing holes 37 are provided on the second clamping block 32, and the fixing columns 36 are inserted into the fixing holes 37 to fix the first clamping block 31 and the second clamping block 32.

[0036] In this embodiment, if Figure 6 As shown, a socket 26 is also provided on the driving head 21, and a pressure rod 5 is connected to the internal thread of the socket 26. An operating port 27 located on the outside of the shell 1 is provided on the trigger rod 2. A pressure head 51 located between the hook spring 13 and the driving head 21 is provided at one end of the pressure rod 5, and a rotating head 52 in contact with the outside through the operating port 27 is provided at the other end. A plurality of groove structures extending vertically and arranged in a ring are also provided on the side of the rotating head 52. After pressing the trigger rod 2, the trigger rod 2 drives the pressure rod 5 to move downward, and the hook spring 13 is deformed by pressing down the pressure head 51.

[0037] The user can rotate the rotating head 52 through the operation port 27. The rotating head 52 is fixed at the end of the pressure rod 5. Therefore, after the rotating head 52 is rotated, the pressure rod 5 as a whole will be driven to rotate in the jack 26. After the pressure rod 5 is rotated, the distance between the pressure head 51 and the hook spring 13 is changed, but the height of the rotating head 52 will not change, thereby changing the moving distance and moving time of the pressure head 51 pressing down to deform the hook spring 13 when the trigger rod 2 is pressed. It is particularly noted that since the hook spring 13 needs to be set obliquely, after the trigger rod 2 is moved by rotating the driving rod 4, the distance between the hook spring 13 and the pressure head 51 will be directly changed. At this time, if it is necessary not to change the moving distance of the pressure head 51 to deform the hook spring 13, the pressure rod 5 needs to be rotated toward the hook spring 13.

[0038] Furthermore, if Figure 6 and Figure 7As shown, a rod cover 24 is fixedly provided on the top of the trigger rod 2, and a vertically extending positioning column 25 is provided on the rod cover 24. A positioning hole 53 is provided on the pressure rod 5 for the positioning column 25 to be movably inserted, so as to maintain the stability of the rotating head 52 and the pressure rod 5 during the rotation process. A matching ring 54 is also provided on the pressure head 51, and a matching groove 28 matching the matching ring 54 is provided on the periphery of the insertion hole 26.

[0039] In this embodiment, if Figure 2 and Figure 8 As shown, the shell 1 also includes a main shell 6 and a cover plate 7, the main shell 6 is provided with a plug-in slot 61, the cover plate 7 is provided with a plug-in plate 71 that fits into the plug-in slot 61 to fix the main shell 6 and the cover plate 7, a sliding bar 17 and a stopper 18 located below the sliding bar 17 are provided on the inner side walls of the main shell 6 and the cover plate 7, and sliding slots 22 that are movably engaged with the sliding bar 17 are provided on both sides of the drive head 21. During the horizontal movement of the drive head 21, the sliding slot 22 moves horizontally along the sliding bar 17, and the stopper 18 is blocked at the bottom of the drive head 21, thereby further improving the stability of the drive head 21 during the horizontal movement.

[0040] 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 micro switch, comprising a base (11) and a housing (1) mounted on the base (11), the base (11) being provided with a moving contact piece (12) and a normally closed static contact piece (15) and a normally open static contact piece (14) located on the upper and lower sides of the moving contact piece (12), the moving contact piece (12) being elastically connected to a hook spring (13), a trigger rod (2) being movably provided on the housing (1), a driving head (21) being located above the hook spring (13) being provided at the bottom of the trigger rod (2), characterized in that: It also includes a clamping member (3) and a driving rod (4) arranged in the housing (1), a clamping groove (23) is provided at the connection between the driving head (21) and the trigger rod (2), one end of the clamping member (3) is transmission-connected to the clamping groove (23), and the other end is transmission-connected to the driving rod (4), the driving rod (4) can rotate relative to the clamping member (3), and the driving rod (4) is also threadedly connected to a connecting hole (8) penetrating the housing (1), and after the driving rod (4) rotates in the connecting hole (8), it drives the clamping member (3) and the trigger rod (2) to move horizontally together; The clamping member (3) comprises a first clamping block (31) and a second clamping block (32); the first clamping block (31) is provided with a first clamping claw (33); the second clamping block (32) is provided with a second clamping claw (34); the first clamping claw (33) and the second clamping claw (34) are both engaged in the clamping groove (23) to drive the clamping member (3) and the clamping groove (23); The driving rod (4) is provided with a cross groove (42) on its end surface at one end of the connecting hole (8), and a ring-shaped transmission groove (41) is provided at the other end, and the first clamping block (31) and the second clamping block (32) are both provided with a transmission block (35) movably engaged in the transmission groove (41); The first clamping block (31) is provided with a fixing column (36), the second clamping block (32) is provided with a fixing hole (37), and the fixing column (36) is inserted into the fixing hole (37) to fix the first clamping block (31) and the second clamping block (32); The driving head (21) is also provided with a socket (26), the socket (26) being internally threadedly connected to a pressure rod (5), the trigger rod (2) being provided with an operating port (27) located outside the housing (1), one end of the pressure rod (5) being provided with a pressure head (51) located between the hook spring (13) and the driving head (21), and the other end being provided with a rotating head (52) in contact with the outside through the operating port (27), and the rotating head (52) being rotated to change the distance between the pressure head (51) and the hook spring (13).

2. The micro switch according to claim 1, characterized in that: A rod cover (24) is fixedly provided on the top of the trigger rod (2), a vertically extending positioning column (25) is provided on the rod cover (24), a positioning hole (53) for movably inserting the positioning column (25) is provided on the pressure rod (5), a matching ring (54) is provided on the pressure head (51), and a matching groove (28) matching the matching ring (54) is provided around the jack (26).

3. The micro switch according to claim 1, characterized in that: The housing (1) further comprises a main housing (6) and a cover plate (7); the main housing (6) is provided with a plug-in slot (61), and the cover plate (7) is provided with a plug-in plate (71) that fits into the plug-in slot (61) to fix the main housing (6) and the cover plate (7).

4. The micro switch according to claim 3, characterized in that: Sliding bars (17) are provided on the inner side walls of the main shell (6) and the cover plate (7), and sliding grooves (22) movably engaged with the sliding bars (17) are provided on both sides of the driving head (21).

5. The micro switch according to claim 4, characterized in that: A stopper (18) is also provided on the inner side wall of the main housing (6) and the cover plate (7) to abut against the bottom of the driving head (21).

6. The micro switch according to claim 1, characterized in that: The rotating head (52) is also provided with a plurality of groove-shaped structures extending vertically and arranged in a ring shape.

Images