Microswitch with simple structure

Abstract

The utility model discloses a microswitch with a simple structure, which comprises a base, three conductive pieces are fixedly arranged on the base, one end of each of two conductive pieces is provided with a static contact piece, one end of the other conductive piece is provided with a support frame, the support frame is connected with a movable contact piece in a swinging manner, an operation block is movably arranged on the base, the operation block is connected with a swinging frame, and the swinging frame is connected with a movable contact piece. A tension spring is connected between the swing frame and the movable contact piece, the base is of an L-shaped structure and comprises a transverse section and a vertical section, one end of the transverse section of the base is connected with the upper end of the vertical section of the base, the swing frame is of an L-shaped structure and comprises a transverse section and a vertical section, one end of the transverse section of the swing frame is connected with the lower end of the vertical section, and the other end of the transverse section of the swing frame is connected with the lower end of the vertical section. A containing space is formed between the base and the swing frame in a surrounding mode, the movable contact piece, the static contact piece, the supporting frame and the tension spring are all arranged in the containing space, and the other end of the transverse section of the swing frame is connected with the lower end of the vertical section of the base in a swinging mode. The microswitch with the simple structure is few in parts, simple in structure and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to a micro switch with a simple structure. Background Art

[0002] A micro switch is a commonly used electronic component, also known as a "micro switch", "limit switch" or "contact switch".

[0003] The Chinese utility model patent discloses a large-pitch micro switch (CN202221950671.0), which includes a shell, on which an operating block, a first pin, a second pin and a third pin are arranged, the first pin is swingably provided with a support frame and a moving contact piece swingably provided on the support frame, the second pin and the third pin are provided with a static contact piece, the moving contact piece is arranged at one side of the support frame corresponding to the static contact piece, the moving contact piece is provided with a tension spring, including a swing frame, the swing frame is arranged at the other side of the support frame, the tension spring is connected to the swing frame and the moving contact piece to form a linkage between the two, the swing frame is bent to form an upper extension part, a lower extension part and a connecting part, the lower extension part is inserted into the support frame to form a swinging cooperation between the swing frame and the support frame, and the upper extension part extends obliquely toward the operating block.

[0004] The working principle of the micro switch in the above patent is: under normal conditions, the moving contact piece fits one of the stationary contact pieces under the pull of the tension spring, and when the user presses the operating block, the moving contact piece will overcome the elastic force of the tension spring and move to fit the other stationary contact piece, forming a state switch.

[0005] The micro switches in the prior art represented by the above-mentioned patent have the following defects: the micro switches need to be wired to the pins when in use, and generally the wires need to be welded to the pins, which makes installation inconvenient; the shell of the micro switch is usually closed, and is composed of two half shells spliced ​​together. The moving and static contacts, tension springs, swinging parts and other components need to be assembled on one of the half shells first, and then the two half shells are spliced ​​together. The structure is complex, there are many parts, and the assembly process is complicated. Summary of the invention

[0006] The utility model provides a micro switch with simple structure and convenient assembly.

[0007] The utility model provides a micro switch with a simple structure, comprising a base, wherein three conductive members are fixedly arranged on the base, wherein one end of two of the conductive members is provided with a static contact piece, and one end of the other conductive member is provided with a support frame, and a moving contact piece is swingably connected to the support frame, and the moving contact piece can selectively make conductive contact with one of the static contact pieces by swinging, and an operating block is movably arranged on the base, and the operating block is transmission-connected with a swing frame, and a tension spring is connected between the swing frame and the moving contact piece, and when the operating block is pressed, the swing frame is driven to swing, and then the tension spring is moved, thereby changing the tension direction of the tension spring, and when the tension spring moves, it can drive the moving contact piece to swing, and the other ends of the three conductive members are all provided with a conductive connecting part, which is used for the conductive connection of the micro switch, and the base is an L-shaped structure, and the base includes The cam is an L-shaped structure, and the cam comprises a transverse section and a vertical section, one end of the transverse section of the base is connected to the upper end of the vertical section of the base, and the operating block is slidably arranged at the other end of the transverse section. The cam is an L-shaped structure, and the cam comprises a transverse section and a vertical section, one end of the transverse section of the cam is connected to the lower end of the vertical section, and an accommodating space is formed around the base and the cam, and the moving contact piece, the static contact piece, the supporting frame, and the tension spring are all arranged in the accommodating space. The accommodating space is formed by the base and the cam, and the front and back sides of the corresponding base are both arranged to be open, which is convenient for the installation of internal components and can also intuitively see the working state of the micro switch. The other end of the transverse section of the cam is swung and connected to the lower end of the vertical section of the base, and the upper end of the vertical section of the cam is cooperatively connected with the tension spring and the operating block.

[0008] Further, a first boss is provided at the lower end side of the vertical section of the base, and first convex shafts are symmetrically provided on both sides of the first boss, and two support arms are provided at the other end of the horizontal section of the swing frame, and a first recess for the first boss to be placed is formed between the two support arms, and the ends of the two support arms are provided with recesses for the two first convex shafts to be placed respectively and form a rotational connection match, and the first convex shaft is kept inserted into the recesses of the two support arms by the tension of the tension spring to form a rotational connection match, which has a simple structure and is relatively convenient to install. When the first boss is placed in the first recess, a limited fit can be formed to reduce shaking and improve the stability of the connection.

[0009] Furthermore, the upper end of the vertical section of the swing frame is provided with a second boss and a first abutment portion located on both sides of the second boss, a hook portion that cooperates with the tension spring is provided on the second boss, and the lower end of the operating block is provided with a second recess and a second abutment portion located on both sides of the second recess, the second boss is inserted into the second recess, and the first abutment portion and the second abutment portion form an abutment fit. When the second boss is inserted into the second recess, a position limiting fit can be formed to reduce shaking and improve the stability of the connection. Through the cooperation of the first abutment portion and the second abutment portion, the swing frame can be driven to swing when the operating block moves downward.

[0010] Furthermore, a swing arm is swingably connected to the upper part of the transverse section of the base, a rotating connection seat is provided at the upper part of one end of the transverse section of the base, one end of the swing arm is rotationally connected to the rotating connection seat, and the other end of the swing arm is abutted against the upper end of the operating block. When the swing arm is pressed and swings, it can drive the operating block to press, thereby improving the triggering effect of the micro switch.

[0011] Furthermore, the rotating connecting seat includes a connecting groove, a side of the connecting groove is provided with an opening for the swing arm to movably pass through, one end of the swing arm includes a rotating shaft rotatably connected to the connecting groove, an axial side of the connecting groove is provided with an opening for the axial insertion of the rotating shaft, which is convenient for the installation of the rotating shaft and the connecting groove, a limiting baffle is provided on the other axial side of the connecting groove to prevent the rotating shaft from escaping from the other axial side of the connecting groove, thereby improving the connection effect, a through hole is provided on the limiting baffle, and a corresponding side of the rotating shaft is provided with a second convex shaft that cooperates with the through hole of the limiting baffle for rotatable insertion, which can further improve the connection effect.

[0012] Furthermore, the conductive connection parts at the other ends of the three conductive members are all arranged on the back side of the base, so as to facilitate the welding and matching between the micro switch and the circuit board.

[0013] Furthermore, it includes a circuit board fixedly mounted on the back side of the base, a welding hole for inserting and conductively connecting with the conductive connecting part at the other end of the conductive member is arranged on the circuit board, and a terminal block connected with the welding hole is arranged on the circuit board, so as to facilitate the conductive connection of the three conductive members of the micro switch.

[0014] The beneficial effects of the utility model are as follows: the internal components such as the moving contact piece, the stationary contact piece, the support frame, the tension spring, etc. of the utility model are all arranged in the accommodating space formed by the base of the L-shaped structure and the swing frame. The overall structure is simple and compact, the number of parts is reduced, and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the overall embodiment of the utility model;

[0016] Figure 2 It is a partial structural diagram of an embodiment of the utility model;

[0017] Figure 3 The explosion of the utility model embodiment as a whole Figure 1 ;

[0018] Figure 4 The explosion of the local embodiment of the utility model Figure 2 ;

[0019] Figure 5 This is a diagram of the connection structure between the moving contact piece and the support frame of the embodiment of the utility model;

[0020] Figure 6It is a cross-sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The implementation of the micro switch with simple structure of the utility model is as follows Figure 1-6 As shown: it includes a base 1, on which three conductive members are fixedly arranged, wherein one end of two conductive members 21 is provided with a static contact piece 31, and one end of another conductive member 22 is provided with a support frame 4, on which a movable contact piece 32 is swingably connected, and the movable contact piece 32 can selectively make conductive contact with one of the static contact pieces 31 by swinging, and an operating block 5 is movably arranged on the base 1, and the operating block 5 is transmission-connected with a swing frame 6, and a tension spring 7 is connected between the swing frame 6 and the movable contact piece 32, and when the operating block 5 is pressed, the swing frame 6 is driven to swing, thereby causing the tension spring 7 to move, thereby changing the tension direction of the tension spring 7, and when the tension spring 7 moves, it can drive the movable contact piece 32 to swing, and the other ends of the three conductive members are provided with a conductive connecting part 20 for conductive connection of the micro switch, and the base 1 is an L-shaped structure, and the base 1 includes a horizontal section 11 and a vertical section 12, One end of the transverse section 11 of the base 1 is connected to the upper end of the vertical section 12 of the base, and the operating block 5 is slidably arranged at the other end of the transverse section 11. The swing frame 6 is an L-shaped structure. The swing frame 6 includes a transverse section 61 and a vertical section 62. One end of the transverse section 61 of the swing frame 6 is connected to the lower end of the vertical section 62. An accommodating space is formed between the base 1 and the swing frame 6. The moving contact piece 32, the static contact piece 31, the support frame 4, and the tension spring 7 are all arranged in the accommodating space. The accommodating space is formed by the base 1 and the swing frame 6. The front and back sides of the corresponding base 1 are both set to be open, which is convenient for the installation of internal components and can also intuitively see the working state of the micro switch. The other end of the transverse section 61 of the swing frame 6 is swingably connected to the lower end of the vertical section 12 of the base 1, and the upper end of the vertical section 62 of the swing frame 6 is cooperatively connected with the tension spring 7 and the operating block 5.

[0022] The lower end side of the vertical section 12 of the base 1 is provided with a first boss 13, and the first convex shafts 14 are symmetrically provided on both sides of the first boss 13. The other end of the horizontal section 61 of the swing frame is provided with two support arms 63, and a first recess 64 for the first boss 13 to be placed is formed between the two support arms 63. The ends of the two support arms 63 are provided with recesses 65 for the two first convex shafts 14 to be placed respectively and form a rotational connection. The first convex shaft 14 is kept inserted into the recesses 65 of the two support arms by the tension of the tension spring 7 and forms a rotational connection. The structure is simple and the installation is relatively convenient. When the first boss 13 is placed in the first recess 64, a limited fit can be formed to reduce shaking and improve the stability of the connection.

[0023] The upper end of the vertical section 12 of the swing frame 6 is provided with a second boss 66 and a first abutment portion 67 located on both sides of the second boss 66. The second boss 66 is provided with a hook portion 661 that cooperates with the tension spring 7 for hooking. The lower end of the operating block 5 is provided with a second recess 51 and a second abutment portion 52 located on both sides of the second recess 51. The second boss 66 is placed in the second recess 51, and the first abutment portion 67 and the second abutment portion 52 form an abutment fit. When the second boss 66 is placed in the second recess 51, a limited fit can be formed to reduce shaking and improve the stability of the connection. Through the cooperation of the first abutment portion 67 and the second abutment portion 52, the swing frame 6 can be driven to swing when the operating block 5 moves downward. The first abutment portion 67 and the second abutment portion 52 have an arc-shaped contact surface at the cooperation point to improve the contact and fit effect.

[0024] The upper part of the transverse section 11 of the base 1 is swingably connected with a swing arm 7, and the upper part of one end of the transverse section 11 of the base 1 is provided with a rotating connection seat 15, one end of the swing arm 7 is rotationally connected and matched with the rotating connection seat 15, and the other end of the swing arm 7 is abutted and matched with the upper end of the operating block 5. When the swing arm 7 is pressed and swung, it can drive the operating block 5 to press, thereby improving the triggering effect of the micro switch.

[0025] The rotating connection seat 15 includes a connection groove 151, and the side of the connection groove 151 is provided with an opening for the swing arm 7 to be movably inserted. One end of the swing arm 7 includes a rotating shaft 71 that is rotatably connected to the connection groove 151. An opening for the axial insertion of the rotating shaft 71 is provided on one axial side of the connection groove 151, which facilitates the plug-in installation of the rotating shaft 71 and the connection groove 151. A limited stopper 152 is provided on the other axial side of the connection groove 151 to prevent the rotating shaft 71 from escaping from the other axial side of the connection groove 151, thereby improving the connection effect. A through hole 153 is provided on the limited stopper 152, and a second convex shaft that cooperates with the through hole 153 of the limited stopper 152 to be rotatably plugged in can further improve the connection effect. In order to prevent the rotating shaft 71 from escaping from one axial side of the connection groove 151, when the micro switch is installed in the device, the axial side of the connection groove 151 can be blocked by the shell or other components of the device.

[0026] The conductive connection parts 20 at the other ends of the three conductive parts are all arranged on the back side of the base 1, which facilitates the welding and matching between the micro switch and the circuit board 8. The base 1 can be fixed to the circuit board 8 through the conductive connection parts 20. In order to further enhance the connection effect, corresponding connection holes are arranged on the base 1 and the circuit board 8, and fixed connection can be achieved through a clamp.

[0027] This embodiment also includes a circuit board 8 fixedly mounted on the back side of the base 1, and a welding hole 80 is provided on the circuit board 8 to be inserted and conductively connected with the conductive connecting part 20 at the other end of the conductive member, and a terminal block 9 connected to the welding hole is provided on the circuit board 8, and the terminal block 9 is electrically connected to the welding hole through an integrated circuit integrated on the circuit board 8. It is convenient for the conductive connection of the three conductive members of the micro switch.

[0028] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A micro switch with a simple structure, comprising a base, on which three conductive members are fixedly arranged, wherein one end of two conductive members is provided with a stationary contact piece, one end of another conductive member is provided with a support frame, a movable contact piece is swingably connected to the support frame, an operating block is movably arranged on the base, the operating block is transmission-connected to the swing frame, a tension spring is connected between the swing frame and the movable contact piece, and the other ends of the three conductive members are all provided with a conductive connection part, characterized in that: The base is an L-shaped structure, the base includes a transverse section and a vertical section, one end of the transverse section of the base is connected to the upper end of the vertical section of the base, and the operating block is slidably arranged at the other end of the transverse section. The swing frame is an L-shaped structure, the swing frame includes a transverse section and a vertical section, one end of the transverse section of the swing frame is connected to the lower end of the vertical section, and an accommodating space is formed between the base and the swing frame. The moving contact piece, the static contact piece, the support frame, and the tension spring are all arranged in the accommodating space, the other end of the transverse section of the swing frame is swingably connected to the lower end of the vertical section of the base, and the upper end of the vertical section of the swing frame is cooperatively connected to the tension spring and the operating block.

2. The micro switch with a simple structure according to claim 1 is characterized in that: A first boss is provided on the lower end side of the vertical section of the base, and the first boss is arranged in the accommodating space. First convex shafts are symmetrically provided on both sides of the first boss. Two supporting arms are provided at the other end of the transverse section of the swing frame, and a first recess for the first boss to be placed therein is formed between the two supporting arms. The ends of the two supporting arms are provided with recesses for the two first convex shafts to be placed therein respectively and to form a rotating connection.

3. The micro switch with a simple structure according to claim 1 is characterized in that: The upper end of the vertical section of the swing frame is provided with a second boss and a first abutment portion located on both sides of the second boss, the second boss is provided with a hook portion that cooperates with the tension spring for hooking, the lower end of the operating block is provided with a second recess and a second abutment portion located on both sides of the second recess, the second boss is inserted into the second recess, and the first abutment portion and the second abutment portion constitute an abutment fit.

4. The micro switch with a simple structure according to claim 1 is characterized in that: The upper part of the transverse section of the base is swingably connected with a swing arm, and the upper part of one end of the transverse section of the base is provided with a rotating connection seat, one end of the swing arm is rotationally connected and matched with the rotating connection seat, and the other end of the swing arm is abutted and matched with the upper end of the operating block.

5. The micro switch with a simple structure according to claim 4 is characterized in that: The rotating connecting seat includes a connecting groove, a side of the connecting groove is provided with an opening for the swing arm to movably pass through, one end of the swing arm includes a rotating shaft rotatably connected in the connecting groove, an axial side of the connecting groove is provided with an opening for the axial insertion of the rotating shaft, the other axial side of the connecting groove is provided with a limit baffle, the limit baffle is provided with a through hole, and a corresponding side of the rotating shaft is provided with a second convex shaft that cooperates with the through hole of the limit baffle for rotation and insertion.

6. The micro switch with a simple structure according to claim 1 is characterized in that: The conductive connection parts at the other ends of the three conductive members are all arranged on the back side of the base.

7. The micro switch with a simple structure according to claim 6 is characterized in that: The invention comprises a circuit board fixedly mounted on the back side of the base, the circuit board is provided with a welding hole which is inserted and conductively connected with the conductive connecting part at the other end of the conductive member, and the circuit board is provided with a wiring seat connected with the welding hole.

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