A push button switch

Abstract

The present application relates to a push button switch, which relates to the technical field of switches. It comprises a sleeve, a switch member fixed in the sleeve, and a pressing cover arranged at one end of the sleeve, wherein a pressing rod is fixedly arranged on the pressing cover; a locking member is arranged on the inner wall of the sleeve, and a resetting member is arranged in the sleeve for pressing down and rotating the pressing cover to reset; an accommodating slot is provided on the outer end surface of the pressing rod, a placement notch is provided on the outer periphery of the pressing rod, a locking plate is slidably provided in the placement notch, a first spring is installed, a locking protrusion is fixedly provided on the locking plate, and a limit block is fixedly provided on the inner wall of the sleeve; a lock key is provided on the outside of the sleeve, a guiding inclined surface is provided on the edge of the end of the lock key, and a locking through hole is provided on the locking plate; in the present application, when it is necessary to unlock the push button switch, the staff needs to release the lock key to perform emergency stop control on the push button switch, so as to reduce the occurrence of emergency stop caused by misoperation or accidental touching of the push button switch by the staff.

Description

Technical Field

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

[0002] In the field of lifting machinery, electric hoists are an important lifting equipment and are widely used in various industrial occasions for lifting and moving heavy objects. In order to ensure safety and reliability during operation, electric hoists are usually equipped with emergency stop knob switches to deal with emergencies. The original intention of the design of this emergency stop knob switch is to quickly cut off the power supply in case of emergencies, prevent accidents, and protect the safety of personnel and equipment. In daily operation, the operator can use this switch to control the start and stop of the electric hoist to ensure that the lifting operation can proceed smoothly.

[0003] At present, the design of the emergency stop knob switch used on the electric hoist of the crane is relatively simple and practical. The main part of the switch is usually made of strong and durable materials, which can withstand certain external impacts. The operating part of the switch is designed as a knob that can be pressed down. When the operator needs to start the electric hoist, he only needs to press the knob lightly. When an emergency requires an emergency stop, the operator needs to rotate the knob to a specific side edge. At this time, under the action of the internal compression spring, the knob will automatically reset upwards, thereby cutting off the power supply and realizing the emergency stop function. This design allows the operator to respond quickly in a short time and effectively avoid accidents.

[0004] However, there are some potential problems with the existing emergency stop knob switch. Since the operating part of the switch is designed to be relatively simple and does not have any form of protection or locking mechanism, anyone can easily operate it. This may lead to the emergency stop knob being accidentally triggered due to improper operation or accidental touch in some non-emergency situations, causing the electric hoist to suddenly stop working. This situation will not only affect the normal progress of the hoisting operation, but may also cause unnecessary damage to equipment and personnel, and there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a push button switch to solve the problem that the above-mentioned knob switch is prone to misoperation and poses a safety hazard.

[0006] The present application provides a push button switch adopting the following technical solution:

[0007] A push button switch comprises a sleeve, a switch member fixed in the sleeve, and a pressing cover arranged at one end of the sleeve, wherein the pressing cover can slide along the axis of the sleeve and rotate around the axis of the sleeve, and a pressing rod for triggering the switch member is fixed on the pressing cover; a locking member for locking the pressing cover when pressed is arranged on the inner wall of the sleeve, and the pressing cover can be unlocked after rotation; a resetting member for resetting the pressing cover when pressed down and rotated is arranged in the sleeve; an accommodating slot is arranged on the outer end surface of the pressing rod, and a locking member connected to the accommodating slot is arranged on the outer periphery of the pressing rod A placement notch is provided, in which a locking plate is slidably arranged, and a first spring is installed; a locking protrusion is fixedly provided on the locking plate and protrudes out of the placement notch under the pressure of the first spring; a limiting block is fixedly provided on the inner wall of the sleeve and locks the protruding locking protrusion; a lock key is provided on the outside of the sleeve, and a guiding inclined surface is provided on the edge of the end of the lock key, and a locking through hole is provided on the locking plate; the lock key can be inserted into the accommodating slot in turn, and pass through the locking through hole along the guiding inclined surface, so that the protruding locking protrusion slides into the placement notch.

[0008] By adopting the above technical solution, when the push button switch needs to be unlocked, the push cover cannot be directly rotated to unlock it. The staff needs to release the lock key to control the emergency stop of the push button switch. First, the lock key is inserted into the accommodating slot and the locking through hole in sequence, and finally the locking plate is squeezed along the guiding inclined surface to make the protruding locking protrusion slide to the placement notch. At this time, the lock between the locking protrusion and the limit block is released; then the push rod is rotated to a certain angle, and then the push rod can be reset upward or rotated in the opposite direction under the action of the reset member to reset; thereby reducing the occurrence of emergency stops caused by misoperation or accidental touching of the push button switch by the unmanned person, and improving the safety performance of the push button switch during use.

[0009] Optionally, a first clamping block is fixedly provided on the outer periphery of the locking plate away from the locking protrusion, and a first clamping groove for the first clamping block to be clamped and slid is provided on the inner wall of the placement notch.

[0010] By adopting the above technical solution, during the sliding adjustment of the locking plate, the sliding stroke of the locking plate is limited due to the combination of the first clamping block and the first clamping slot, thereby improving the stability of the locking plate during the sliding process.

[0011] Optionally, a second blocking block is fixedly provided on the outer periphery of the locking plate facing the locking protrusion, and the second blocking block is located on the side edge of the locking plate away from the first blocking block; a second blocking groove for inserting a first spring is opened on the inner wall of the placement notch, and the two ends of the first spring are respectively fixedly connected to the second blocking block and the inner wall of the second blocking groove, and the first spring is used to squeeze the second blocking block so that the locking protrusion protrudes into the placement notch.

[0012] By adopting the above technical solution, the installation limit of the first spring is achieved, and the stability of the locking plate during the sliding process is further enhanced.

[0013] Optionally, a third notch connected to the accommodating slot is provided on the outer periphery of the pressing rod, a limit plate is slidably provided in the third notch, and a second spring for squeezing the limit plate is fixedly provided; a limit through hole for the lock key to pass through is provided on the limit plate, and a limit groove for the inner edge of the limit through hole to be inserted into is provided on the outer periphery of the lock key.

[0014] By adopting the above technical solution, when the lock key passes through the limiting through hole and the locking through hole unlocks the pressing rod, the inner edge of the limiting through hole is inserted into the limiting groove on the lock key, thereby improving the installation stability of the lock key in the accommodating slot.

[0015] Optionally, a first annular groove and a second annular groove are respectively provided on the sides of the sleeve and the pressing cover that are close to each other, and the reset member is a reset compression spring with both ends respectively inserted into the first annular groove and the second annular groove; a first hook and a second hook are respectively fixed on both ends of the reset compression spring, a first notch for the first hook to be engaged is provided on the inner wall of the first annular groove, and a second notch for the second hook to be engaged is provided on the inner wall of the second annular groove.

[0016] By adopting the above technical solution, during the installation process of the reset compression spring, the two ends of the reset compression spring are respectively inserted into the first annular groove and the second annular groove, the first hook is inserted into the first notch, and the second hook is inserted into the second notch, thereby achieving the installation and fixation of the reset compression spring and enhancing the installation stability of the reset compression spring.

[0017] Optionally, a rotating block is fixedly provided on the outer periphery of the pressing rod, and a rotating limit groove is opened on the inner wall of the sleeve for the rotating block to be inserted and rotated; a limit ring is fixedly provided on the inner wall of the sleeve and is located below the rotating block, and the lower side surface of the rotating block can abut against the upper side of the limit ring when the pressing cover is pressed.

[0018] By adopting the above technical solution, the rotation angle of the pressing rod can be limited by rotating the limiting groove, and the downward pressing stroke of the pressing rod can be limited by using the limiting retaining ring, thereby improving the performance of the push button switch.

[0019] Optionally, a limiting convex ring is fixed on the outer periphery of the pressing rod, an unlocking surface is relatively arranged on the outer periphery of the limiting convex ring, and a guide inclined surface is provided on the side edge of the limiting convex ring away from the pressing cover; the locking piece is two elastic rods relatively fixed below the limiting ring, wherein the two elastic rods are simultaneously located outside the limiting convex ring; when the pressing rod is reset upward, it needs to rotate itself to a state where the unlocking surface is parallel to the elastic rod; the elastic rod is perpendicular to the unlocking surface during the process of pressing the pressing rod downward, and can undergo elastic deformation along the guide inclined surface until the elastic rod moves to above the limiting convex ring and then restores its deformation and abuts against the upper side of the limiting convex ring.

[0020] By adopting the above technical solution, when the pressing rod is pressed down to start, the length direction of the elastic rod is perpendicular to the unlocking surface. At this time, pressing down can cause the pressing rod to elastically deform outward along the guide inclined surface. Finally, the elastic rod moves to the top of the limiting convex ring and then restores its deformation and abuts against the upper side of the limiting convex ring; when the pressing rod is reset upward, the staff needs to rotate the pressing rod to a state where the unlocking surface is parallel to the elastic rod, and then the pressing rod can be reset and moved upward under the action of the reset member.

[0021] Optionally, a support plate located below the pressing cover is fixedly provided on the outer periphery of the sleeve, and two protective covers located outside the pressing cover are detachably mounted on the support plate, and side edges of the two protective covers close to each other are provided with notches for making way for the lock key; an adjusting rod is provided on the outside of the protective cover along the axial direction of the sleeve, and an adjusting through hole is provided on the protective cover for the adjusting rod to be inserted and slide, and the inner end of the adjusting rod abuts against the upper side of the pressing cover, and the adjusting rod can press the pressing cover when the outer end is squeezed.

[0022] By adopting the above technical solution, due to the combined arrangement of the support plate, the protective cover and the adjusting rod, it is possible to use two relative protective covers to protect the outside of the push button switch, and also to indirectly press the pressing cover downward with the help of the adjusting rod, thereby reducing the possibility of external dust or other impurities adhering to the outside of the push button switch and improving the corresponding protective performance.

[0023] Optionally, the adjustment holes on the two protective covers are symmetrically arranged around the axis of the sleeve, and the edges of the lower parts of the two protective covers that are away from each other are hinged to the support plate; the adjusting rod extends to the outer periphery of the corresponding protective cover and an extension rod is fixedly provided, and the end of the extension rod extends into the other protective cover, and a positioning protrusion is fixedly provided on the outer periphery of the end of the extension rod; a support block located below the positioning protrusion is fixedly provided on the inner wall of the other protective cover, and a positioning slot is provided on the support block, and an elastic extrusion piece is provided on the inner wall of the protective cover to drive the positioning protrusion to slide toward the positioning slot; the positioning protrusion can be inserted into the corresponding positioning slot when the adjusting rod presses the pressing rod.

[0024] By adopting the above technical solution, when the user presses the adjustment rod down to start the push button switch, the positioning protrusion can move down with the adjustment rod and be inserted into the corresponding positioning slot, so that the two protective covers are locked with each other, reducing the possibility of the two protective covers opening when the push button switch is started; when the push button switch needs to be repaired, only by adjusting the push button switch to the stop state can the positioning protrusion be removed from the positioning slot, and then the two protective covers can be opened, thereby improving the corresponding safety performance.

[0025] Optionally, the elastic extrusion member includes a third spring, a guide block and a baffle located on the inner side of the protective cover, the baffle being fixed on the outer periphery of the adjusting rod extending into the protective cover, and a guide block being fixed on the inner wall of the protective cover; the guide block is located on the side of the baffle away from the pressing rod, and a guide through hole for the adjusting rod to pass through is provided on the guide block; the third spring is in a compressed state, and the two ends of the third spring are respectively fixedly connected to the sides of the baffle and the guide block that are close to each other.

[0026] By adopting the above technical solution, when the button switch is in a downward pressed state, the third spring squeezes the baffle, causing the positioning protrusion to move toward the pressing cover and insert into the corresponding positioning slot, thereby reducing the possibility of the two protective covers opening when the button switch is started.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] When the push button switch needs to be unlocked, the push cover cannot be directly turned to unlock it. The staff needs to release the lock key to control the push button switch to emergency stop, so as to reduce the occurrence of emergency stops caused by misoperation or accidental touching of the push button switch by others, and improve the safety performance during the use of the push button switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0031] Figure 2 It is a schematic diagram of the explosion structure of Example 1 of the present application;

[0032] Figure 3 It is a partial cross-sectional structural schematic diagram of the installation and cooperation of the reset member and the locking member embodied in the first embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the structure of the installation distribution of the reset member in Example 1 of the present application;

[0034] Figure 5 It is a cross-sectional structural schematic diagram of the installation and cooperation of the rotating block and the rotating limit groove in Example 1 of the present application;

[0035] Figure 6 It is a partial cross-sectional structural schematic diagram of the embodiment 1 of the present application embodying the installation and matching of the elastic rod;

[0036] Figure 7 This is a schematic diagram of the structure of the installation and matching of the limiting convex ring in Example 1 of the present application;

[0037] Figure 8 This is a schematic diagram of the structure of the installation distribution of the pressing rod, the first spring and the second spring according to the first embodiment of the present application;

[0038] Fig. 9 is a schematic cross-sectional structural diagram of the embodiment 1 of the present application showing the installation and cooperation between the locking plate and the first spring;

[0039] Fig.10 It is a cross-sectional structural schematic diagram of the installation and cooperation of the locking plate and the limiting block embodied in the first embodiment of the present application;

[0040] Fig.11 is a schematic cross-sectional structural diagram of the installation and cooperation of the limit plate and the second spring in Example 1 of the present application;

[0041] Fig.12 It is a schematic diagram of the overall structure of Example 2 of the present application;

[0042] Fig.13 It is a partial cross-sectional structural schematic diagram of the installation and cooperation of the protective cover and the adjustment rod in Example 2 of the present application;

[0043] Fig.14 It is a schematic diagram of the partial cross-sectional structure of the installation and cooperation of the elastic extrusion part according to Example 2 of the present application.

[0044] In the figure, 1, sleeve; 11, first annular groove; 12, first notch; 13, rotation limit groove; 14, limit retaining ring; 15, locking member; 151, elastic rod; 16, limit block; 17, support plate; 2, switch member; 3, pressing member; 31, pressing cover; 311, second annular groove; 312, second notch; 32, pressing rod; 321, rotation block; 322, limit convex ring; 3221, unlocking surface; 3222, guiding inclined surface; 323, accommodating slot; 324, placement notch; 3241, first card slot; 3242, second card slot; 325, third notch; 33, locking plate; 331, locking Through hole; 332, locking protrusion; 333, first clamping block; 334, second clamping block; 34, first spring; 35, limiting plate; 351, limiting through hole; 36, second spring; 4, reset member; 41, reset compression spring; 411, first hook; 412, second hook; 5, lock key; 51, guide slope; 52, limiting groove; 6, protective cover; 61, clearance gap; 62, elastic pad; 63, adjustment through hole; 64, support block; 641, positioning slot; 7, adjustment rod; 71, extension rod; 711, positioning protrusion; 8, elastic extrusion member; 81, third spring; 82, guide block; 83, baffle. DETAILED DESCRIPTION

[0045] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0046] Embodiment 1:

[0047] Reference Figure 1 , Figure 2 and Figure 3 A push button switch comprises a sleeve 1, a switch member 2 fixed in the sleeve 1, and a pressing member 3 arranged at one end of the sleeve 1, wherein the pressing member 3 comprises a pressing cover 31 and a pressing rod 32 fixed at one side of the pressing cover 31, the pressing cover 31 can slide along the axis of the sleeve 1 and rotate around the axis of the sleeve 1, and the pressing rod 32 can trigger the switch member 2 when the pressing cover 31 is pressed down; a locking member 15 for preventing the pressing cover 31 from automatically returning to the upper position after being pressed down and a resetting member 4 for driving the pressing cover 31 to return to the upper position are fixed on the inner wall of the sleeve 1;

[0048] When the push button switch is in the pressed state, the reset member 4 is compressed, and the locking member 15 locks the pressing rod 32, so that it cannot move upward in its natural state. At this time, the circuit connected to the switch member 2 is turned on; when the push button switch needs to be stopped urgently, the staff can rotate the pressing cover 31 to release the lock of the locking member 15 on the pressing cover 31, and then drive the pressing cover 31 to move upward and reset through the reset member 4, and rotate it in the opposite direction to reset, and finally disconnect the circuit connected to the switch member 2.

[0049] Reference Figure 3 When the pressing cover 31 is not pressed down, the internal moving contact and static contact of the switch member 2 are in a disconnected state; when the pressing cover 31 is pressed downward, the internal moving contact and static contact are in a contact state. This is a conventional structure and will not be described in detail here.

[0050] Reference Figure 3 and Figure 4 A first annular groove 11 is formed on the side of the sleeve 1 facing the pressing cover 31, wherein a second annular groove 311 is formed on the side of the pressing cover 31 facing the sleeve 1, and the reset member 4 is a reset compression spring 41 whose two ends are respectively inserted into the first annular groove 11 and the second annular groove 311;

[0051] A first hook 411 and a second hook 412 are integrally formed on both ends of the reset spring 41, a first notch 12 for the first hook 411 to be inserted into the inner wall of the first annular groove 11 is provided, and a second notch 312 for the second hook 412 to be inserted into the inner wall of the second annular groove 311 is provided; the reset spring 41 can provide a torsional force for the pressing cover 31 to rotate and reset.

[0052] Reference Figure 5Two rotating blocks 321 are relatively fixed on the outer periphery of the pressing rod 32, wherein a rotation limiting groove 13 is opened on the inner wall of the sleeve 1 for the rotating block 321 to be inserted and rotated, so as to limit the rotation angle of the pressing rod 32 through the rotation limiting groove 13; a limiting retaining ring 14 is integrally formed on the inner wall of the sleeve 1 and is located below the rotating block 321; when the pressing cover 31 is pressed down, the lower side surface of the rotating block 321 can abut against the upper side of the limiting retaining ring 14.

[0053] Reference Figure 6 and Figure 7 A limiting convex ring 322 is integrally formed on the outer periphery of the pressing rod 32, wherein unlocking surfaces 3221 are arranged opposite to each other on the outer periphery of the limiting convex ring 322, and the two unlocking surfaces 3221 are arranged in parallel; a guide inclined surface 3222 is arranged on the side edge of the limiting convex ring 322 away from the pressing cover 31, and the locking member 15 is two elastic rods 151 relatively fixedly arranged below the limiting retaining ring 14, wherein the two elastic rods 151 are simultaneously located outside the limiting convex ring 322;

[0054] When the pressing rod 32 is reset upward, the staff needs to rotate the pressing rod 32 until the unlocking surface 3221 is parallel to the elastic rod 151; when the pressing rod 32 is pressed downward, the length direction of the elastic rod 151 is perpendicular to the unlocking surface 3221. At this time, pressing downward can cause the pressing rod 32 to elastically deform outward along the guide inclined surface 3222, and finally the elastic rod 151 moves to above the limiting convex ring 322 and then restores its deformation and abuts against the upper side of the limiting convex ring 322.

[0055] Reference Figure 8 , Fig. 9 and Fig.10 The outer end of the pressing rod 32 is provided with an accommodating slot 323 along its own axial direction, wherein the outer periphery of the pressing rod 32 is provided with a placement notch 324 connected to the accommodating slot 323, and a locking plate 33 is slidably arranged in the placement notch 324, and a first spring 34 is installed for pressing the locking plate 33, and a locking protrusion 332 is fixedly arranged on the locking plate 33 and protrudes out of the placement notch 324 under the pressure of the first spring 34, and a limiting block 16 is fixedly arranged on the inner wall of the sleeve 1 for locking the protruding locking protrusion 332; a lock key 5 is provided on the outside of the sleeve 1, wherein a guiding inclined surface 51 is provided on the end edge of the lock key 5, and a locking through hole 331 that can be penetrated by the lock key 5 is provided on the locking plate 33;

[0056] When the button is in the pressed state, the locking protrusion 332 abuts against one side of the limit block 16 under the action of the reset member 4, so that the staff cannot rotate the pressing rod 32 to unlock it; when unlocking the button switch in the pressed state, the staff inserts the lock key 5 into the accommodating slot 323 and the locking through hole 331 in sequence, and finally squeezes the locking plate 33 along the guide slope 51, so that the locking protrusion 332 in the protruding state slides to the placement notch 324. At this time, the lock between the locking protrusion 332 and the limit block 16 is released, and the staff can rotate the pressing cover 31 and the pressing rod 32 to stop the button switch urgently.

[0057] Reference Fig. 9 A first clamping block 333 is integrally formed on the outer periphery of the locking plate 33 away from the locking protrusion 332, and a first clamping groove 3241 is provided on the inner wall of the placement notch 324 for the first clamping block 333 to be clamped and slid into; a second clamping block 334 is integrally formed on the outer periphery of the locking plate 33 facing the locking protrusion 332, and the second clamping block 334 is located on the side edge of the locking plate 33 away from the first clamping block 333;

[0058] A second slot 3242 for inserting the first spring 34 is provided on the inner wall of the placement notch 324 , and both ends of the first spring 34 are fixedly connected to the second block 334 and the inner wall of the second slot 3242 respectively. The first spring 34 is used to squeeze the second block 334 so that the locking protrusion 332 protrudes into the placement notch 324 .

[0059] Reference Figure 8 and Fig.11 A third notch 325 communicating with the accommodating slot 323 is provided on the outer periphery of the pressing rod 32, wherein a limiting plate 35 is slidably provided in the third notch 325, and a second spring 36 for pressing the limiting plate 35 is fixedly provided; a limiting through hole 351 for the lock key 5 to pass through is provided on the limiting plate 35, and a limiting groove 52 is provided on the outer periphery of the lock key 5;

[0060] When the lock key 5 passes through the limiting through hole 351 and the locking through hole 331 to unlock the pressing rod 32, the inner edge of the limiting through hole 351 is inserted into the limiting groove 52 on the lock key 5, thereby improving the installation stability of the lock key 5 in the accommodating slot 323; in addition, the limiting plate 35 is also provided with a structure similar to the first card block 333 and the second card block 334 on the locking plate 33. This is a conventional limiting structural feature and will not be repeated here.

[0061] The implementation principle of the embodiment of the present application is:

[0062] When the button switch is pressed downward to the start state, the length direction of the elastic rod 151 is perpendicular to the unlocking surface 3221. At this time, the pressing down can cause the pressing rod 32 to elastically deform outward along the guiding inclined surface 3222. Finally, the elastic rod 151 moves to the top of the limiting convex ring 322 and then recovers its deformation and abuts against the upper side of the limiting convex ring 322. The return compression spring 41 is in a compressed state.

[0063] When the push button switch needs to be unlocked, the staff inserts the lock key 5 into the accommodating slot 323 and the locking through hole 331 in sequence, and finally squeezes the locking plate 33 along the guiding slope 51, so that the protruding locking protrusion 332 slides to the placement notch 324. At this time, the lock between the locking protrusion 332 and the limit block 16 is released; then the pressing rod 32 is rotated to a state where the unlocking surface 3221 is parallel to the elastic rod 151. At this time, under the action of the reset compression spring 41, the pressing rod 32 is reset upward and rotated in the opposite direction to reset.

[0064] Embodiment 2:

[0065] Reference Fig.12 and Fig.13 The embodiment of the present application is different from the embodiment 1 in that a support plate 17 located below the pressing cover 31 is fixedly provided on the outer periphery of the sleeve 1, wherein two protective covers 6 located on both sides of the pressing cover 31 are detachably mounted on the support plate 17, and a clearance notch 61 for the lock key 5 is provided on the side edges of the two protective covers 6 close to each other, and an elastic pad 62 made of rubber material is fixedly provided on the side edges of the two protective covers 6 close to each other;

[0066] The outside of the two protective covers 6 are both provided with adjusting rods 7 along the axial direction of the sleeve 1, wherein the protective covers 6 are provided with adjusting through holes 63 for the adjusting rods 7 to be inserted and slide, and the adjusting through holes 63 on the two protective covers 6 are symmetrically arranged around the axis of the sleeve 1; when the outer end of the adjusting rod 7 is squeezed by the staff, the inner end of the adjusting rod 7 can abut against the upper side of the pressing cover 31 and press the pressing cover 31 downward.

[0067] Reference Fig.11 , Fig.12 and Fig.13 , the edges of the lower part of the protective cover 6 that are away from each other are hinged to the support plate 17, and the adjusting rod 7 extends to the outer periphery of the corresponding protective cover 6 and is fixed with an extension rod 71, wherein the end of the extension rod 71 extends into another protective cover 6, and a positioning protrusion 711 is integrally formed on the outer periphery of the end of the extension rod 71;

[0068] A support block 64 located below the positioning protrusion 711 is fixedly provided on the inner wall of the other protective cover 6, and a positioning slot 641 is provided on the support block 64. An elastic extrusion piece 8 is provided on the inner wall of the protective cover 6 to drive the positioning protrusion 711 to slide toward the positioning slot 641; when the user presses the adjustment rod 7 to start the button switch, the positioning protrusion 711 can move down with the adjustment rod 7 and be inserted into the corresponding positioning slot 641, thereby locking the two protective covers 6 with each other.

[0069] Reference Fig.12 and Fig.13 The elastic extrusion member 8 includes a third spring 81, a guide block 82 and a baffle 83 located inside the protective cover 6, wherein the third spring 81 has a smaller elastic force than the return compression spring 41, the baffle 83 is fixed on the outer periphery of the adjustment rod 7 extending into the protective cover 6, and the guide block 82 is fixed on the vertical inner side surface of the protective cover 6;

[0070] The guide block 82 is located on the side of the baffle 83 away from the pressing rod 32. A guide through hole is provided on the guide block 82 for the adjustment rod 7 to pass through. The third spring 81 is in a compressed state, and the two ends of the third spring 81 are respectively fixedly connected to the side surfaces of the baffle 83 and the guide block 82 that are close to each other.

[0071] When the button switch is unlocked, under the action of the return compression spring 41, the pressing cover 31 can squeeze the adjusting rod 7 in the reverse direction, and then compress the third spring 81, so that the positioning protrusion 711 is disengaged from the positioning slot 641; when the button switch is in a downward pressing state, the third spring 81 squeezes the baffle 83, so that the positioning protrusion 711 moves toward the pressing cover 31 and is inserted into the corresponding positioning slot 641.

[0072] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0073] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A push button switch, comprising a sleeve (1), a switch element (2) fixedly arranged in the sleeve (1), and a pressing cover (31) arranged at one end of the sleeve (1), wherein the pressing cover (31) can slide along the axis of the sleeve (1) and rotate around the axis of the sleeve (1), and a pressing rod (32) for triggering the switch element (2) is fixedly arranged on the pressing cover (31); a locking element (15) for locking the pressing cover (31) when pressed down is arranged on the inner wall of the sleeve (1), and the pressing cover (31) can be unlocked after being rotated; and a resetting element (4) for resetting the pressing cover (31) when pressed down and rotated is arranged in the sleeve (1); It is characterized in that The outer end surface of the pressing rod (32) is provided with an accommodating slot (323), the outer periphery of the pressing rod (32) is provided with a placement notch (324) which is in communication with the accommodating slot (323), a locking plate (33) is slidably arranged in the placement notch (324), and a first spring (34) is installed thereon, the locking plate (33) is fixedly provided with a locking protrusion (332) which protrudes out of the placement notch (324) under the pressure of the first spring (34), and a limiting block (16) is fixedly provided on the inner wall of the sleeve (1) for locking the protruding locking protrusion (332); A lock key (5) is provided on the outside of the sleeve (1), a guiding inclined surface (51) is provided on the edge of the end of the lock key (5), and a locking through hole (331) is provided on the locking plate (33); the lock key (5) can be sequentially inserted into the accommodating slot (323), pass through the locking through hole (331) along the guiding inclined surface (51), and make the locking protrusion (332) in a protruding state slide into the placement notch (324).

2. A push button switch according to claim 1, characterized in that: A first clamping block (333) is fixedly provided on the outer periphery of the locking plate (33) away from the locking protrusion (332), and a first clamping groove (3241) for the first clamping block (333) to be clamped and slid into is provided on the inner wall of the placement notch (324).

3. A push button switch according to claim 2, characterized in that: A second clamping block (334) is fixedly provided on the outer periphery of the locking plate (33) facing the locking protrusion (332), and the second clamping block (334) is located on the side edge of the locking plate (33) away from the first clamping block (333); A second clamping groove (3242) for inserting the first spring (34) is provided on the inner wall of the placement notch (324); two ends of the first spring (34) are respectively fixedly connected to the second clamping block (334) and the inner wall of the second clamping groove (3242); the first spring (34) is used to squeeze the second clamping block (334) so ​​as to make the locking protrusion (332) protrude from the placement notch (324).

4. A push button switch according to claim 1, characterized in that: A third notch (325) communicating with the accommodating slot (323) is provided on the outer periphery of the pressing rod (32); a limiting plate (35) is slidably provided inside the third notch (325) and a second spring (36) is fixedly provided for pressing the limiting plate (35); a limiting through hole (351) for the lock key (5) to pass through is provided on the limiting plate (35); a limiting groove (52) for the inner edge of the limiting through hole (351) to be inserted is provided on the outer periphery of the lock key (5).

5. A push button switch according to claim 1, characterized in that: A first annular groove (11) and a second annular groove (311) are respectively formed on the sides of the sleeve (1) and the pressing cover (31) that are close to each other, and the reset member (4) is a reset compression spring (41) with two ends respectively inserted into the first annular groove (11) and the second annular groove (311); A first hook (411) and a second hook (412) are respectively fixedly provided at both ends of the return compression spring (41); a first notch (12) for the first hook (411) to be inserted into is provided on the inner wall of the first annular groove (11); and a second notch (312) for the second hook (412) to be inserted into is provided on the inner wall of the second annular groove (311).

6. A push button switch according to claim 1, characterized in that: A rotating block (321) is fixedly arranged on the outer periphery of the pressing rod (32), and a rotating limit groove (13) is provided on the inner wall of the sleeve (1) for the rotating block (321) to be inserted and rotated; a limit retaining ring (14) is fixedly arranged on the inner wall of the sleeve (1) and is located below the rotating block (321), and the lower side surface of the rotating block (321) can abut against the upper side of the limit retaining ring (14) when the pressing cover (31) is pressed.

7. A push button switch according to claim 6, characterized in that: A limiting convex ring (322) is fixedly arranged on the outer periphery of the pressing rod (32), an unlocking surface (3221) is relatively arranged on the outer periphery of the limiting convex ring (322), and a guide inclined surface (3222) is arranged on the side edge of the limiting convex ring (322) away from the pressing cover (31); the locking member (15) is two elastic rods (151) relatively fixedly arranged below the limiting retaining ring (14), wherein the two elastic rods (151) are simultaneously located outside the limiting convex ring (322); When the pressing rod (32) is reset upward, it needs to rotate itself to a state where the unlocking surface (3221) is parallel to the elastic rod (151); when the pressing rod (32) is pressed downward, the elastic rod (151) is perpendicular to the unlocking surface (3221) and can be elastically deformed along the guiding inclined surface (3222) until the elastic rod (151) moves above the limiting convex ring (322) and then restores its deformation and abuts against the upper side of the limiting convex ring (322).

8. A push button switch according to claim 1, characterized in that: A support plate (17) located below the pressing cover (31) is fixedly provided on the outer periphery of the sleeve (1), and two protective covers (6) located outside the pressing cover (31) are detachably mounted on the support plate (17), and a clearance notch (61) for the lock key (5) is provided on the side edges of the two protective covers (6) adjacent to each other; An adjusting rod (7) is arranged outside the protective cover (6) along the axial direction of the sleeve (1); an adjusting through hole (63) is provided on the protective cover (6) for the adjusting rod (7) to be inserted and slide; the inner end of the adjusting rod (7) abuts against the upper side of the pressing cover (31); and the adjusting rod (7) can press the pressing cover (31) when the outer end is squeezed.

9. A push button switch according to claim 8, characterized in that: The adjustment through holes (63) on the two protective covers (6) are symmetrically arranged around the axis of the sleeve (1); the edges of the lower parts of the two protective covers (6) that are away from each other are hinged to the support plate (17); the adjustment rod (7) is extended to the outer periphery of the corresponding protective cover (6) and is fixedly provided with an extension rod (71); the end of the extension rod (71) extends into the other protective cover (6); and a positioning protrusion (711) is fixedly provided on the outer periphery of the end of the extension rod (71); A support block (64) located below the positioning protrusion (711) is fixedly arranged on the inner wall of the other protective cover (6); a positioning slot (641) is provided on the support block (64); and an elastic extrusion member (8) is provided on the inner wall of the protective cover (6) for driving the positioning protrusion (711) to slide toward the positioning slot (641); the positioning protrusion (711) can be inserted into the corresponding positioning slot (641) when the adjusting rod (7) presses the pressing rod (32).

10. A push button switch according to claim 9, characterized in that: The elastic extrusion member (8) comprises a third spring (81) located inside the protective cover (6), a guide block (82) and a baffle (83); the baffle (83) is fixedly arranged on the outer periphery of the adjustment rod (7) extending into the protective cover (6); and the guide block (82) is fixedly arranged on the inner wall of the protective cover (6); The guide block (82) is located on the side of the baffle (83) away from the pressing rod (32), and a guide through hole is provided on the guide block (82) for the adjustment rod (7) to pass through; the third spring (81) is in a compressed state, and the two ends of the third spring (81) are respectively fixedly connected to the side surfaces of the baffle (83) and the guide block (82) that are close to each other.

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