Microswitch with lever type button structure

Abstract

The utility model discloses a microswitch with a lever type button structure, which comprises a shell, a button, a first conductive piece and at least one second conductive piece, the shell comprises an inner cavity, one end of the first conductive piece and one end of the second conductive piece are arranged in the inner cavity of the shell in a penetrating manner, one end of the first conductive piece is connected with a contact bridge in a swinging manner, and the other end of the second conductive piece is connected with the button. The other ends of the first conductive part and the second conductive part penetrate through the outer side of the shell and are used for wiring, the button is movably arranged on the shell, a swing rod is arranged in an inner cavity of the shell, one end of the swing rod is rotationally connected with the shell, the button is arranged at the other end of the swing rod, and a through hole is formed in the upper end of the shell. And the middle part of the swing rod is provided with a bulge which is in contact fit with the contact bridge. The microswitch with the lever type button structure is simple and compact in structure, the button has a long motion stroke, impact on the contact bridge can be reduced, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to a microswitch with a lever - type button structure. Background Art

[0002] A microswitch is a small electrical switch, which is widely used in various electronic devices and mechanical systems. Due to its small size, sensitive response, high reliability and other characteristics, the microswitch has a wide range of applications in the electronic and electrical fields.

[0003] Existing microswitches generally include a housing, a button, a first conductive member and at least one second conductive member. The housing includes an inner cavity. One ends of the first conductive member and the second conductive member are inserted into the inner cavity of the housing. One end of the first conductive member is swing - connected with a contact bridge (reed). A moving contact is arranged at the end of the contact bridge. A static contact that cooperates with the moving contact for conduction and interruption is arranged at one end of the second conductive member. The other ends of the first conductive member and the second conductive member are inserted outside the housing and are used for wiring. The button is movably inserted between the inside and outside of the housing. By pressing the button, the contact bridge can be driven to swing, so as to realize the conduction and interruption cooperation of the static and moving contacts. The microswitch usually also includes an elastic member, which is used to drive the swing reset of the contact bridge and the press reset of the button. On some types of microswitches, a contact bridge that can self - reset after deformation is adopted, and the reset functions of the contact bridge and the button can also be realized.

[0004] The buttons of traditional microswitches all move in a straight - up - and - down linear manner. The pressing end at the upper end and the triggering end at the lower end of the button are in the same straight - line direction. The thrust when the button is pressed down will directly act on the contact bridge, which will cause a certain impact on the contact bridge, easily causing excessive deformation and damage of the contact bridge, and thus affecting the overall service life of the product. Summary of the Invention

[0005] The utility model provides a microswitch with a lever - type button structure. Its button has a longer movement stroke, which can reduce the impact on the contact bridge and improve the service life of the product.

[0006] The microswitch with a lever - type button structure of the utility model includes a housing, a button, a first conductive member, and at least one second conductive member. The housing includes an inner cavity. One ends of the first conductive member and the second conductive member are inserted into the inner cavity of the housing. One end of the first conductive member is swing - connected with a contact bridge. A moving contact is arranged at the end of the contact bridge. One end of the second conductive member is provided with a static contact that cooperates with the moving contact for making and breaking. The other ends of the first conductive member and the second conductive member are inserted outside the housing and are used for wiring. The button is movably arranged on the housing. A swing rod is arranged in the inner cavity of the housing. One end of the swing rod is rotatably connected with the housing. The button is arranged at the other end of the swing rod. A through - hole for the button to extend outside the housing is arranged at the upper end of the housing. A protrusion that is in contact - fit with the contact bridge is arranged in the middle of the swing rod.

[0007] Since the button is arranged at the other end of the swing rod and the protrusion is arranged in the middle of the swing rod, a power arm is formed between the button and the rotation axis of the swing rod, and a resistance arm is formed between the protrusion and the rotation axis of the swing rod. The length of the power arm is greater than that of the resistance arm. Therefore, a labor - saving lever structure can be formed. Only a relatively small acting force is required to trigger the microswitch, and the movement stroke of the button can be increased, making the contact bridge not easily subjected to a large impact. Thus, the service life of the product can be improved.

[0008] When one second conductive member is adopted, the working state of the microswitch depends on the on - off state corresponding to that of the first conductive member and the second conductive member. When two second conductive members are adopted, the static contacts of the two second conductive members can be respectively located on both sides of the movement path of the moving contact. In the normal state, the moving contact is in contact connection with the static contact of one of the second conductive members. By pressing the button, the moving contact can be separated from this static contact and come into contact connection with the other static contact, so as to realize the switching connection between the first conductive member and the two second conductive members.

[0009] The microswitch can be configured with an elastic member connected between the housing and the component to be driven for resetting, which is used to drive the reset of the contact bridge and the swing rod. In addition, a contact bridge with a snap - action function can also be adopted. When pressed by the protrusion of the swing rod, it deforms to drive the movement of the moving contact. When the protrusion moves away from the contact bridge, the contact bridge deforms and resets under its own elastic action to drive the reset movement of the moving contact.

[0010] Furthermore, the housing includes a main body part and a protruding part extending from one end of the main body part. The longitudinal height and lateral width of the protruding part are both smaller than those of the main body part. The inner cavity of the housing is composed of a main inner cavity located in the main body part and a secondary inner cavity located in the protruding part. The through - hole is arranged on the protruding part. The other end of the swing rod is movably arranged in the secondary inner cavity of the protruding part, making the overall structure of the microswitch more compact and reducing the space occupation.

[0011] Further, the housing includes a base and a cover plate. A groove is formed in the base, and the cover plate cooperates with the notch of the groove to be closed to form the inner cavity. The housing includes a boss, which is arranged in the groove and protrudes relative to the bottom of the groove. A narrow slot is formed at an interval between the boss and the cover plate. One end of the swing rod is rotatably connected in the narrow slot, and the side walls on both sides of the narrow slot have a limiting effect on one end of the swing rod, which can reduce the sway of the swing rod.

[0012] Further, a first connection hole is formed in the boss. One side of one end of the swing rod includes a first convex shaft that is rotatably inserted in cooperation with the first connection hole. The inner side of the cover plate includes a second convex shaft, and a second connection hole that is rotatably inserted in cooperation with the second convex shaft is correspondingly arranged on the other side of one end of the swing rod. This connection method between one end of the swing rod and the housing ensures that there is sufficient and reliable connection strength between one end of the swing rod and the housing, will not affect the thickness of the cover plate, and the connection structure is simple and convenient for assembly.

[0013] Further, the swing rod includes a first straight section, a second straight section that are parallel to each other, and an inclined section connected between the first straight section and the second straight section. One end of the first straight section is rotatably connected in the narrow slot, the other end of the first straight section and one end of the second straight section are respectively connected to both ends of the inclined section. The button is arranged at the other end of the second straight section, and the other end of the second straight section is movably arranged in the secondary inner cavity. The longitudinal height and lateral width of the secondary inner cavity are both smaller than those of the main inner cavity. In fact, the secondary inner cavity only needs to have enough space for the other end of the second straight section to move, which helps to reduce the overall volume of the micro switch. The secondary inner cavity is longitudinally connected to a position above one end of the main inner cavity and laterally connected to the middle position of one end of the main inner cavity. Through the connection of the inclined section, the first straight section and the second straight section of the swing rod are in a misaligned position, so that the second straight section of the swing rod can be arranged at a position corresponding to the middle of the main inner cavity, which helps to improve the force effect between the swing rod and the contact bridge.

[0014] Further, a first limiting convex point is arranged at the upper end of the second straight section near the button, and a second limiting convex point is arranged at the lower end of the second straight section corresponding to the lower end of the button. The settings of the first limiting convex point and the second limiting convex point can play a role in cooperating with the inner wall of the inner cavity for limiting, realizing the limitation of the up-and-down swing angle range of the swing rod. The settings of the first and second limiting convex points can reduce the requirements for the manufacturing process precision of the swing rod, and it is easier to control the swing range of the swing rod during processing and manufacturing. By restricting the swing range of the swing rod, it is possible to prevent the contact bridge from being over-pressed and damaged.

[0015] Furthermore, the side of the button includes a guiding arc surface / inclined surface, which enables the button to be better pressed and triggered when facing a lateral thrust, improving the triggering effect of the button and the applicability of the microswitch.

[0016] The beneficial effects of the present utility model are as follows: The microswitch of the present utility model has a lever-type button structure. When the button is pressed and triggered, it moves in a swinging manner, having a relatively long movement stroke, which can reduce the impact on the contact bridge and improve the service life of the product. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 is an exploded view of an embodiment of the present utility model;

[0019] Figure 3 is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the base of an embodiment of the present utility model;

[0021] Figure 5 is the structure of the swing rod of an embodiment of the present utility model Figure 1 ;

[0022] Figure 6 is the structure of the swing rod of an embodiment of the present utility model Figure 2 ;

[0023] Figure 7 is a structural diagram of the cover plate of an embodiment of the present utility model;

[0024] Figure 8 is a cross-sectional view of an embodiment of the present utility model. Detailed Embodiment

[0025] An embodiment of the microswitch with a lever-type button structure of the present utility model is as Figure 1-8As shown in the figure, it includes a housing (11, 12), a button 21, a first conductive member 31, and two second conductive members 32. The housing includes an inner cavity 10. One end of the first conductive member 31 and the second conductive members 32 penetrates into the inner cavity 10 of the housing. One end of the first conductive member 31 is swingably connected with a contact bridge 4. A moving contact 51 is arranged at the end of the contact bridge 4. A static contact 52 that cooperates with the moving contact 51 to conduct or cut off is arranged at one end of the second conductive member 32. The static contacts 52 at one end of the two second conductive members 32 are respectively located on both sides of the movement path of the moving contact 51. The other ends of the first conductive member 31 and the second conductive members 32 penetrate outside the housing and are used for wiring. The button 21 is movably arranged on the housing. A swing rod 6 is arranged in the inner cavity of the housing. One end of the swing rod 6 is rotatably connected with the housing. The button 21 is arranged at the other end of the swing rod 6. A through hole 13 for the button 21 to extend outside the housing is arranged at the upper end of the housing. The side part of the button 21 includes a guiding arc surface 211, which can also be set as an inclined surface in other embodiments. A protrusion 22 that is in contact cooperation with the contact bridge 4 is arranged in the middle of the swing rod 6.

[0026] Since the button 21 is arranged at the other end of the swing rod 6 and the protrusion 22 is arranged in the middle of the swing rod 6, a power arm is formed between the button 21 and the rotation axis of the swing rod 6, and a resistance arm is formed between the protrusion 22 and the rotation axis of the swing rod 6. The length of the power arm is greater than that of the resistance arm. Therefore, a labor-saving lever structure can be formed, and only a relatively small acting force is required to trigger the micro switch. Moreover, the movement stroke of the button 21 can be increased, so that the contact bridge 4 is not easily subjected to a large impact. Therefore, the service life of the product can be improved, and the triggering effect of the micro switch can be enhanced.

[0027] When the button 21 is horizontally pressed, the guiding arc surface 211 can be used to drive the swing rod 6 to swing. When the swing rod 6 swings, the contact bridge 4 is driven to swing through the protrusion 22, and then the moving contact 51 moves accordingly, so that the moving contact 51 switches from the initial state of contacting one of the static contacts 52 to contacting the other static contact 52.

[0028] In other embodiments, there can also be only one second conductive member 32. In the initial state, the moving contact 51 is in contact connection / disconnection with the static contact 52, and in the pressed state, it switches to disconnection / contact connection.

[0029] In this embodiment, a contact bridge 4 with a snap action function is adopted. When pressed by the protrusion 22 of the swing rod 6, it deforms, thereby driving the moving contact 51 to move. When the protrusion 22 moves away from the contact bridge 4, the contact bridge 4 deforms and resets under its own elastic action, thereby driving the moving contact 51 to reset. Of course, it can also drive the swing rod 6 and the button 21 to reset at the same time. In other embodiments, elastic components such as springs and tension springs can also be configured to be connected between the housing and the components to be driven to reset, and are used to drive the reset of the contact bridge 4 and the swing rod 6.

[0030] The housing includes a main body part 121 and a protruding part 122 extending from one end of the main body part 121. The longitudinal height and lateral width of the protruding part 122 are both smaller than those of the main body part. The inner cavity 10 of the housing is composed of a main inner cavity 101 located in the main body part 121 and a secondary inner cavity 102 located in the protruding part 122. The through hole 13 is provided on the protruding part 122. The other end of the swing rod 6 is movably arranged in the secondary inner cavity 102 of the protruding part 122, making the overall structure of the micro switch more compact and reducing the space occupation.

[0031] The housing includes a base 11 and a cover plate 12. A groove is formed in the base 11. The cover plate 12 is cooperatively closed with the notch of the groove to form the inner cavity 10. The housing includes a boss 111. The boss 111 is arranged in the groove and protrudes relative to the bottom of the groove. A narrow groove 14 is formed at an interval between the boss 111 and the cover plate 12. One end of the swing rod 6 is rotatably connected in the narrow groove 14. The side walls on both sides of the narrow groove 14 have a limiting effect on one end of the swing rod 6, which can reduce the shaking of the swing rod 6.

[0032] A first connection hole 71 is provided on the boss 111. One side of one end of the swing rod 6 includes a first convex shaft 23 that is rotatably inserted in cooperation with the first connection hole 71. The inner side of the cover plate 12 includes a second convex shaft 24. The other side of one end of the swing rod 6 is correspondingly provided with a second connection hole 72 that is rotatably inserted in cooperation with the second convex shaft 24. By adopting this connection method between one end of the swing rod 6 and the housing, it is ensured that there is sufficient and reliable connection strength between one end of the swing rod 6 and the housing, which will not affect the thickness of the cover plate 12, and the connection structure is simple and convenient for assembly.

[0033] The swing rod 6 includes a first straight section 61, a second straight section 62 which are parallel to each other, and an inclined section 63 connected between the first straight section 61 and the second straight section 62. One end of the first straight section 61 is rotatably connected in the narrow groove 14. The other end of the first straight section 61 and one end of the second straight section 62 are respectively connected to both ends of the inclined section 63. The button 21 is arranged at the other end of the second straight section 62. The other end of the second straight section 62 is movably arranged in the secondary inner cavity 102. The longitudinal height and lateral width of the secondary inner cavity 102 are both smaller than those of the main inner cavity 101. In fact, the secondary inner cavity 102 only needs to have enough space for the other end of the second straight section 62 to move, which helps to reduce the overall volume of the microswitch. The secondary inner cavity 102 is longitudinally connected to a position above one end of the main inner cavity 101 and laterally connected to a middle position of one end of the main inner cavity 101. Through the connection of the inclined section 63, the first straight section and the second straight section 62 of the swing rod 6 are in a misaligned position, so that the second straight section 62 of the swing rod 6 can be arranged at a position corresponding to the middle of the main inner cavity 101, which helps to improve the force-bearing effect between the swing rod 6 and the contact bridge 4.

[0034] A first limiting bump 24 is arranged at the upper end of the second straight section 62 near the button 21, and a second limiting bump 25 is arranged at the lower end of the second straight section 62 corresponding to the lower end of the button 21. The settings of the first limiting bump 24 and the second limiting bump 25 can play a role in cooperating with the inner wall of the inner cavity for limiting, so as to realize the limitation of the up-and-down swing angle range of the swing rod 6. In this embodiment, the first limiting bump 24 cooperates with the top inner wall of the main inner cavity 101 for limiting, and the second limiting bump 25 cooperates with the bottom inner wall of the secondary inner cavity 102 for limiting. The setting of the limiting bumps makes it easier to control the swing range of the swing rod 6 during the processing and manufacturing of the swing rod 6. By restricting the swing range of the swing rod 6, it is possible to prevent the contact bridge 4 from being over-pressed and damaged.

[0035] The above embodiments are only one of the preferred specific embodiments of the present invention. The ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A micro switch with a lever-type button structure, comprising a housing, a button, a first conductive member, and at least a second conductive member, the housing comprising an inner cavity, one end of the first conductive member and the second conductive member being inserted into the inner cavity of the housing, one end of the first conductive member being swingably connected to a contact bridge, the end of the contact bridge being provided with a moving contact, one end of the second conductive member being provided with a stationary contact for switching on and off in cooperation with the moving contact, the other ends of the first conductive member and the second conductive member being inserted into the outer side of the housing and used for wiring, the button being movably provided on the housing, characterized in that: A rocker is arranged in the inner cavity of the shell, one end of which is rotatably connected to the shell, the button is arranged at the other end of the rocker, the upper end of the shell is provided with a through hole for the button to extend out of the shell, and the middle part of the rocker is provided with a protrusion that contacts and cooperates with the contact bridge.

2. The micro switch with a lever-type button structure according to claim 1, characterized in that: The shell includes a main body part and a protruding part extending from one end of the main body part, the longitudinal height and lateral width of the protruding part are smaller than the main body part, the inner cavity of the shell is composed of a main inner cavity located in the main body part and a secondary inner cavity located in the protruding part, the through hole is arranged on the protruding part, and the other end of the rocker arm is movably arranged in the secondary inner cavity of the protruding part.

3. The micro switch with a lever-type button structure according to claim 2, characterized in that: The shell includes a base and a cover plate. The base is provided with a groove. The cover plate cooperates with the notch of the groove to form the inner cavity. The shell includes a boss. The boss is arranged in the groove and protrudes relative to the bottom of the groove. A narrow groove is formed between the boss and the cover plate. One end of the rocker arm is rotatably connected in the narrow groove.

4. The micro switch with a lever-type button structure according to claim 3, characterized in that: A first connecting hole is provided on the boss, one side of one end of the rocker arm includes a first convex shaft that is rotatably connected to the first connecting hole, the inner side of the cover plate includes a second convex shaft, and the other side of one end of the rocker arm is correspondingly provided with a second connecting hole that is rotatably connected to the second convex shaft.

5. The micro switch with a lever-type button structure according to claim 3, characterized in that: The rocker arm includes a first straight section and a second straight section which are parallel to each other, and an inclined section connected between the first straight section and the second straight section. One end of the first straight section is rotatably connected to the narrow groove, and the other end of the first straight section and one end of the second straight section are respectively connected to the two ends of the inclined section. The button is arranged at the other end of the second straight section, and the other end of the second straight section is movably arranged in the secondary inner cavity. The longitudinal height and lateral width of the secondary inner cavity are both smaller than the main inner cavity. The secondary inner cavity is longitudinally connected to an upper position of one end of the main inner cavity and laterally connected to a middle position of one end of the main inner cavity.

6. The micro switch with a lever-type button structure according to claim 5, characterized in that: The upper end of the second straight section is provided with a first limiting convex point near the button position, and the lower end of the second straight section is provided with a second limiting convex point at a position corresponding to the lower end of the button.

7. The micro switch with a lever-type button structure according to claim 1, characterized in that: The side of the button includes a guiding curved surface / inclined surface.

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