Cross drive travel switch

Abstract

The utility model relates to circuit switch technical field, concretely is a kind of cross drive travel switch, comprising: base, button, conducting rod combination and contact spring mechanism are set to the top surface of the base;The contact spring mechanism two ends are connected with external circuit respectively;Under the drive of the button, the conducting rod combination is connected or separated with the contact spring mechanism by cross shearing joint movement, realizes the on-off control of external circuit.The cross drive travel switch of the utility model is outstanding in lightweight, high reliability, long life, impact resistance and vibration and fast response etc., especially applicable to the weapon system and other high-precision equipment with extremely high performance requirements.

Description

Technical Field

[0001] This utility model relates to the field of circuit switch technology, specifically a cross-drive limit switch. Background Technology

[0002] Limit switches are core electromechanical interface components in weapon control links. Their working principle involves using the collision of external mechanical parts to actuate a drive mechanism, thereby causing the conductive component and the contact spring component to make instantaneous contact or separation, thus connecting, disconnecting, or switching the control circuit. Traditional structures typically consist of four main parts: a drive component, a conductive component, a contact spring component, and an output component, which is sufficient to meet the signal switching requirements of general military platforms.

[0003] However, the new generation of highly maneuverable weapon systems places more stringent "marginal performance" requirements on limit switches: on the one hand, to improve the range and maneuverability of the aircraft, the overall mass of the missile must be optimized with meticulous weight reduction, requiring the switch body to be flat and lightweight; on the other hand, the switch must operate reliably for a long time in extreme environments with a wide temperature range of -65℃ to 125℃, a continuous acceleration of 400g / 1min, an impact of 400g / 10ms, and a mechanical life of more than 100,000 cycles. Current conventional limit switches generally weigh more than 150g, have a body height of approximately 50mm±10mm, still use sliding friction contact, and have a mechanical life of only about 5000 cycles. These cannot meet the comprehensive requirements of the new generation of weapon systems for size, weight, lifespan, and high overload adaptability, and urgently need to be replaced by lighter, thinner, and more durable cross-drive limit switches. Utility Model Content

[0004] The purpose of this invention is to provide a cross-drive limit switch to solve at least one of the above-mentioned technical problems, so as to achieve the limit switch's lightweight, flattened design, long lifespan, and resistance to high-intensity mechanical environments.

[0005] This utility model achieves the above objectives through the following technical solutions: A cross-drive limit switch includes a base, a button, a conductive rod assembly, and a contact spring mechanism disposed on the top surface of the base; The two ends of the spring mechanism are respectively connected to an external circuit; Driven by the button, the conductive rod assembly connects or separates from the contact spring mechanism through a cross-shearing motion, thereby controlling the on / off state of the external circuit.

[0006] Furthermore, the limit switch also includes: side compression springs disposed on the upper part of the base and on both sides of the conductive rod assembly; The conductive rod assembly includes two cross-hinged conductive rod mechanisms, each of which includes a drive rod, with a roller at one end and a conductor at the other end. The lower section of the button has a conical structure. In the free state, when the button is not pressed down, the side pressure spring pushes the two conductive rod mechanisms to cross and tighten inward, so that the conductor contacts the contact spring mechanism, and the external circuit is connected. When the button is pressed down, the conical section of the button opens the two rollers, driving the two conductive rod mechanisms to rotate outward, the conductor separates from the contact spring mechanism, and the external circuit is disconnected.

[0007] Furthermore, the spring contact mechanism includes: an insulated spring seat, The spring seat is provided with a plurality of conductive springs arranged symmetrically on the left and right, and the “V”-shaped contact part of each spring is exposed on the edge of the spring seat; When the conductor comes into contact with the "V"-shaped contact portion of the reed, the external circuit is turned on.

[0008] Furthermore, the spring-touch mechanism also includes: an insulated spring seat cover; The spring seat cover is disposed on the top of the spring seat and is used to limit and press the spring sheet to prevent the spring sheet from loosening or shifting.

[0009] Furthermore, two springs are provided on each of the left and right sides of the spring seat, and the two springs on each side are electrically connected in parallel to form a double redundant path; During the shearing motion, the conductor simultaneously contacts two springs on the same side, forming a two-point parallel conductive structure.

[0010] Furthermore, the limit switch also includes: a center bushing, a stepped stop block, and a pivot pin; The central bushing is disposed between the intersection hinge point of the two conductive rod mechanisms to isolate and reduce friction between the two conductive rod mechanisms; The stepped stop block is disposed between the two side compression springs, and the shaft pin passes through the side compression spring and connects to the stepped stop block.

[0011] Furthermore, the conductive rod mechanism also includes: an upper insulator and a lower insulator; Both the upper insulator and the lower insulator are fitted onto the end of the drive rod, and a conductor mounting groove is formed between the upper insulator and the lower insulator; the conductor is disposed in the conductor mounting groove.

[0012] Furthermore, the limit switch also includes a housing; The inner cavity of the outer shell is provided with multiple positioning rods. The first positioning rod is used to fix the hinge point of the conductive rod assembly, and the second and third positioning rods are used to fix the contact spring mechanism. The upper part of the outer shell has through holes on both sides corresponding to the position of the side compression spring. The through holes are used to pass through the support structure that fixes the direction of the side compression spring.

[0013] Furthermore, the limit switch also includes: a button spring; The base has a circular sleeve at the top for guiding the button, and the outer shell has a spring guide post at the corresponding position; The upper part of the button is a cylindrical shape with a ball head, the lower part is a conical shape, and the inner cavity is provided with a blind hole that cooperates with the button compression spring; The cylindrical section with a ball head of the button matches the size of the circular sleeve of the base.

[0014] Furthermore, the outer casing has multiple mounting sleeves on its side, through which screws can be passed to fix the switch to an external device.

[0015] The cross-drive limit switch proposed in this utility model has several significant advantages: In terms of structural design, the switch body of this utility model is only 9mm high and weighs less than 40g. It adopts a redundant design with two-way switching to achieve the dual goals of flatness and lightweight. The conductor of this invention adopts a unique left-right shearing motion mode, which effectively reduces contact loss and significantly extends the service life of the switch while ensuring stable and reliable contact of the switch contacts. This utility model incorporates three spring drives, making full use of the vibration damping and impact resistance characteristics of the springs, enabling the switch to work stably even under complex mechanical environments such as impact and vibration, and possessing strong resistance to mechanical environments. This utility model uses a mounting sleeve on the side of the outer shell to easily fix the switch to an external device with screws, making operation simple and efficient; The overall switch structure of this invention exhibits excellent resistance to mechanical environments, easily adapting to harsh mechanical environments with high vibration and strong impact; the mechanical life of this invention's switch exceeds 100,000 cycles, fully meeting the stringent requirements for switch reliability and durability in frequently used weapon systems and other applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-drive limit switch according to one embodiment of the present invention; Figure 2 This is a side sectional view of the overall structure of a cross-drive limit switch according to one embodiment of the present invention; Figure 3 This is a front sectional view of the overall structure of a cross-drive limit switch according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the conductive rod mechanism according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the conductor structure according to one embodiment of the present invention; Figure 6This is a schematic diagram of the contact spring mechanism according to one embodiment of the present invention; Figure 7 This is a schematic diagram of a reed structure according to one embodiment of the present invention; Figure 8 This is a schematic diagram of the outer shell structure of one embodiment of the present invention; Figure 9 This is a schematic diagram of a button structure according to one embodiment of the present invention; Figure 10 This is a schematic diagram of the base structure according to one embodiment of the present invention.

[0017] The components are as follows: 1. Base; 2. Spring mechanism; 2-1 Spring seat cover; 2-2 Spring seat; 2-3 Spring leaf; 3. Center bushing; 4. Conductive rod assembly; 4-1 Lower insulator; 4-2 Conductor; 4-3 Upper insulator; 4-4 Drive rod; 4-5 Roller rivet; 4-6 Roller; 5. Side compression spring; 6. Stepped stop block; 7. Housing; 8. Button; 9. Button compression spring; 10. Shaft pin. Detailed Implementation

[0018] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the present invention, and are not intended to imply any limitation on the scope of the present invention.

[0019] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0020] Example 1 Figure 1 This is a schematic diagram of the cross-drive limit switch according to one embodiment of the present invention; wherein, Figure 1 (A) is a front view of the exterior. Figure 1 (B) is a side view of the exterior. Figure 2 This is a side sectional view of the overall structure of a cross-drive limit switch according to one embodiment of the present invention; Figure 3 This is a front sectional view of the overall structure of a cross-drive limit switch according to one embodiment of the present invention. Figure 1-3 As shown, according to one embodiment of the present invention, a cross-drive limit switch includes a base 1, a button 8, a conductive rod assembly 4, and a contact spring mechanism 2 disposed on the top surface of the base 1. The two ends of the spring mechanism 2 are respectively connected to the external circuit; Driven by button 8, conductive rod assembly 4 connects or separates from contact spring mechanism 2 through cross-cutting motion, thereby realizing the on / off control of external circuit.

[0021] In this embodiment, a cross-drive limit switch is proposed, which is only 9mm thick, 47mm long and 31mm wide, and the weight of the whole machine is controlled within 40g, realizing the flatness and lightweight required by the weapon system. The switch includes a base 1, a button 8, a conductive rod assembly 4 and a spring contact mechanism 2. Multiple parallel springs 2-3 extend from the left and right sides of the spring contact mechanism 2 and are connected to the external circuit to form a redundant path. In the free state, button 8 is not pressed. The left and right side springs 5, through the elastic skeleton formed by the central bushing 3 and the stepped stop block 6, push the two conductive rod mechanisms to cross and shear around the first positioning round rod of the outer shell 7, so that the conductor 4-2 at the end of the drive rod 4-4 presses against the "V"-shaped exposed area of ​​the two springs 2-3 on the same side, and the two points are connected in parallel, and the two sets of circuits are reliably closed. When the external force presses down on button 8, the conical section of button 8 opens the roller 4-6 hinged to the front end of the drive rod 4-4, and the two conductive rod mechanisms overcome the elastic force of the side springs 5 ​​and open outward. The conductor 4-2 and the spring 2-3 separate instantly, and the two sets of circuits are disconnected synchronously, completing the pure rolling shearing action without slippage. The shearing motion causes the conductor 4-2 and the spring 2-3 to slip slightly at the moment of separation and engagement, which can automatically break the surface oxide film and reduce contact loss. The built-in multi-stage vibration reduction system ensures that the contact pressure of the switch remains constant under high impact conditions and mechanical life of over 100,000 cycles, meeting the requirements of high-frequency start-stop and high-reliability signal switching of weapon systems.

[0022] The cross-drive limit switch of this invention achieves flattening and lightweight design, has dual redundant paths, can reliably switch circuits on and off, completes pure rolling shearing action without sliding, can automatically break the membrane to reduce damage, and has a built-in multi-stage vibration reduction system to meet the requirements of high-frequency start-stop and high-reliability signal switching of weapon systems.

[0023] Figure 4 This is a schematic diagram of a conductive rod mechanism according to one embodiment of the present invention; wherein, Figure 4 (A) is a front view of the conductive rod mechanism. Figure 4 (B) is a side view of the conductive rod mechanism structure; Figure 5 This is a schematic diagram of a conductive body structure according to one embodiment of the present invention; wherein, Figure 5 (A) is a front view of the conductor. Figure 5 (B) is a schematic diagram of the side view of the conductor. For example... Figure 2-5 As shown, according to one embodiment of the present invention, the limit switch further includes: side compression springs 5 ​​disposed on the upper part of the base 1 and on both sides of the conductive rod assembly 4; The conductive rod assembly 4 includes two cross-hinged conductive rod mechanisms. Each conductive rod mechanism includes a drive rod 4-4. One end of the drive rod 4-4 is provided with a roller 4-6, and the other end is provided with a conductor 4-2. The lower section of button 8 has a conical structure. In the free state, when button 8 is not pressed down, the side pressure spring 5 pushes the two conductive rod mechanisms to cross and tighten inward, so that the conductor 4-2 contacts the contact spring mechanism 2, and the external circuit is connected. When button 8 is pressed down, the conical section of button 8 opens the two rollers 4-6, driving the two conductive rod mechanisms to rotate outward, the conductor 4-2 separates from the contact spring mechanism 2, and the external circuit is disconnected.

[0024] In this embodiment, a compression spring 5 is provided on each side of the upper part of the base 1 and the left and right sides of the conductive rod assembly 4 to provide continuous inward elastic force for the cross-shearing motion. The conductive rod assembly 4 is composed of two cross-hinged conductive rod mechanisms. Each mechanism includes a drive rod 4-4, the front end of which is equipped with a roller 4-6 that rolls with the conical section of the button 8, and the end is fixed with a conductor 4-2, forming a pure rolling drive chain with the shortest lever arm. In the free state, button 8 is not pressed. The two compression springs 5 ​​simultaneously push the drive rod 4-4, causing the two conductive rod mechanisms to cross and tighten inward around the common hinge point. As a result, the conductor 4-2 maintains reliable contact with the corresponding contact of the touch spring mechanism 2, and the external circuit is connected. When button 8 is pressed down, its conical section simultaneously opens the left and right rollers 4-6, driving the two conductive rod mechanisms to overcome the elastic force of the side compression springs 5 ​​and rotate outward. The conductor 4-2 is disengaged from the touch spring mechanism 2 as the tail end of the drive rod 4-4 opens, and the external circuit is instantly disconnected, completing a cross-shearing switch with no sliding wear and self-cleaning contacts.

[0025] This invention utilizes a side-pressure spring to provide elastic force and a pure rolling drive chain design to achieve cross-cutting switching with no sliding wear and self-cleaning contacts, ensuring reliable circuit continuity.

[0026] Figure 6 This is a schematic diagram of the contact spring mechanism according to one embodiment of the present invention; Figure 7 This is a schematic diagram of a reed structure according to one embodiment of the present invention. Figure 6-7 As shown, according to one embodiment of the present invention, the spring contact mechanism 2 includes: an insulated spring seat 2-2; The spring seat 2-2 is provided with a plurality of conductive springs 2-3 arranged symmetrically on the left and right, and the “V”-shaped contact part of each spring 2-3 is exposed on the edge of the spring seat 2-2; When conductor 4-2 contacts the “V”-shaped contact part of reed 2-3, the external circuit is turned on.

[0027] Preferably, the spring contact mechanism 2 further includes: an insulated spring seat cover 2-1; The spring seat cover 2-1 is located on top of the spring seat 2-2 to limit and press the spring 2-3, preventing the spring 2-3 from loosening or shifting.

[0028] Preferably, two springs 2-3 are provided on each of the left and right sides of the spring seat 2-2, and the two springs 2-3 on each side are electrically connected in parallel to form a double redundant path; During the shearing motion, conductor 4-2 simultaneously contacts two springs 2-3 on the same side, forming a two-point parallel conductive structure.

[0029] In this embodiment, the contact spring mechanism 2 is based on an insulated square prism spring seat 2-2. Two rectangular through holes are pre-made in its cavity, and through square holes are symmetrically opened on the upper and lower sides of the side walls. During assembly, four spring pieces 2-3 are inserted from the bottom of the rectangular through holes until the "V"-shaped bends are exposed from the square holes, forming cantilevered elastic contacts. Then, the two protrusions of the insulated spring seat cover 2-1 are pressed in along the same rectangular through hole, so that the double 90° bends at the tail end of the spring piece 2-3 are simultaneously pressed against the bottom surface of the spring seat 2-2 and the root of the protrusions, achieving fastener-free positioning and preventing loosening or displacement. Two springs 2-3 are arranged on each side, and the two springs 2-3 on the same side are electrically connected in parallel to form a double redundant path. When the conductor 4-2 of the conductive rod assembly 4 presses against the contact area during the cross-shearing motion, its conductive surface simultaneously forms a double-point parallel conduction with the "V" area of ​​the two springs 2-3 on the same side, which significantly reduces the risk of single-point failure. The elastic micro-slip of the "V"-shaped cantilever automatically removes the surface oxide film and maintains low-resistance stable contact. If a switching point needs to be added in the middle of the stroke, only one set of the same contact spring mechanism 2 needs to be arranged on the movement trajectory of the conductor 4-2 to expand the normally closed switch into a double-group switching circuit without changing the original cross-drive structure. The contact spring mechanism 2, together with the side pressure spring 5 and the button pressure spring 9, constitutes a multi-spring system, which enables the switch to maintain constant contact pressure under the harsh environment of 400g / 1min acceleration, 400g / 10ms impact and 100,000 mechanical life, ensuring high reliability of switching.

[0030] The contact spring mechanism of this utility model forms a dual redundant path and a dual-point parallel conduction structure, which reduces the risk of single-point failure, automatically removes oxide film, and can flexibly expand the circuit. When used in conjunction with a multi-spring system, it can maintain constant contact pressure in harsh environments and ensure highly reliable switching.

[0031] According to one embodiment of the present invention, the limit switch further includes: a center bushing 3, a stepped stop block 6, and a shaft pin 10; The central bushing 3 is positioned between the cross hinge points of the two conductive rod mechanisms to isolate and reduce friction; The stepped stop block 6 is located between the two side compression springs 5, and the shaft pin 10 passes through the side compression springs 5 ​​and connects to the stepped stop block 6.

[0032] In this embodiment, a central bushing 3 is placed between the cross hinge points of the two conductive rod mechanisms. The central bushing 3 completely isolates the relative rotation surfaces of the two rods, avoiding direct friction between the two conductive rod mechanisms, significantly reducing wear and maintaining rotational flexibility. At the same time, a stepped stop block 6 is set between the two compression springs 5. The shaft pin 10 passes through the through hole in the side wall of the outer shell, the side compression spring 5, the drive rod 4-4 and the stepped stop block 6 in sequence, and is then riveted and fixed, so that the stepped stop block 6 becomes a common support for the two compression springs 5, ensuring that the elastic force of the two compression springs is transmitted coaxially and does not interfere with each other, thereby achieving high-precision, low-friction and long-life operation of the cross-shearing motion.

[0033] This invention reduces friction through a central bushing isolation conductive rod mechanism and ensures coaxial transmission of the spring force by cooperating with a stepped stop block and a shaft pin, thereby achieving high-precision, low-friction, and long-life operation of the cross-shearing motion.

[0034] According to one embodiment of the present invention, the conductive rod mechanism further includes: an upper insulator 4-3 and a lower insulator 4-1; The upper insulator 4-3 and the lower insulator 4-1 are both fitted onto the end of the drive rod 4-4, and a conductor mounting groove is formed between the upper insulator 4-3 and the lower insulator 4-1; the conductor 4-2 is set in the conductor mounting groove.

[0035] In this embodiment, the conductive rod mechanism is based on the drive rod 4-4. A roller 4-6 is first placed in the square groove at the front end of the drive rod 4-4, and then a roller rivet 4-5 is passed through from the side and expanded to form a freely rotatable rolling contact. The lower insulator 4-1, the conductor 4-2, and the upper insulator 4-3 are sequentially fitted onto the end of the drive rod 4-4. After the three are stacked, a conductor mounting groove is formed between the upper insulator 4-3 and the lower insulator 4-1, so that the conductor 4-2 is electrically isolated from the drive rod 4-4. Then, the round hole at the end of the drive rod 4-4 is expanded and riveted to make the upper insulator 4-3, the lower insulator 4-1, and the conductor 4-2 axially locked at one time. This not only prevents the conductor 4-2 from loosening, but also ensures reliable insulation under high impact and high vibration environments, thereby providing a low-friction, high-stability, and long-life conductive-insulating integrated structure for cross-shearing motion.

[0036] This invention provides a conductive-insulating integrated structure with low friction, high stability, and long lifespan by setting upper and lower insulators to form a conductive mounting groove in the conductive rod mechanism, thereby achieving electrical isolation and axial locking between the conductive body and the drive rod.

[0037] Figure 8 This is a schematic diagram of the outer shell structure according to one embodiment of the present invention; wherein, Figure 8 (A) is a schematic diagram of the front of the casing; Figure 8 (B) is a sectional view of the outer casing from the side. For example... Figure 8As shown, according to one embodiment of the present invention, the switch further includes a housing 7; The inner cavity of the outer shell 7 is provided with multiple positioning rods. The first positioning rod is used to fix the hinge point of the conductive rod assembly 4, and the second and third positioning rods are used to fix the contact spring mechanism 2. The upper part of the outer casing 7 has through holes on both sides corresponding to the position of the side compression spring 5. The through holes are used to pass through the support structure that fixes the side compression spring 5.

[0038] In this embodiment, the outer shell 7 is a square quadrangular prism disk with pre-drilled stepped holes for mounting long shaft pins on the left and right sides of the front end. The cylindrical mounting through holes at the four corners correspond one-to-one with the through holes at the four corners of the base 1. After laser welding, the entire machine is assembled. Four positioning rods protrude from the inner cavity of the shell. The first rod has a ball head for guiding the button spring 9. The second rod (the first positioning rod) has a frustum at the lower end and a blind hole at the upper end for hinged connection of the conductive rod assembly 4 and bearing shear force. The third and fourth rods (the second and third positioning rods) have blind holes at the top for fitting and riveting the touch spring mechanism 2. A cable lead-out hole is also reserved below the fourth rod to achieve wire harness isolation and output. Through holes are opened on both sides of the upper part of the outer shell 7 coaxially with the side spring 5, allowing the long shaft pin 10 to pass through and connect and fix the side spring 5, the stepped stop block 6, and the conductive rod mechanism in series at one time, ensuring that the spring force direction is constant and there is no lateral deviation. The base 1 is a square thin plate with a sealing groove inside the central cylindrical sleeve. The four holes at the corners of the plate are aligned with the cylindrical mounting through holes of the outer shell. After all the internal parts are assembled and the spring 2-3 welding points are filled with glue, the base sleeve is pressed onto the outer circle of the button 8, and the outer shell-base joint is laser-sealed around the perimeter, thus forming an integrated positioning-support-sealing structure that ensures a 9mm ultra-thin profile and meets the requirement of zero displacement of the contact position under high impact conditions.

[0039] The outer shell of this utility model uses multiple positioning rods to precisely fix the internal components, and the through holes and long shaft pins ensure that the direction of the compression spring force is constant. Together with the base, it forms an integrated positioning-support-sealing structure, achieving an ultra-thin shape and meeting the requirement of zero displacement of the contact points under high impact.

[0040] Figure 9 This is a schematic diagram of a button structure according to one embodiment of the present invention; wherein, Figure 9 (A) is a front view of the button; Figure 9 (B) is a side view of the button; Figure 9 (C) is a schematic diagram of the overall structure of the button. Figure 10 This is a schematic diagram of the base structure according to one embodiment of the present invention; wherein, Figure 10 (A) is a front view of the base; Figure 10 (B) is a schematic diagram of the side of the base. For example... Figure 2 , Figure 3 , Figure 9 , Figure 10As shown, according to one embodiment of the present invention, the switch further includes: a button spring 9; The base 1 has a circular sleeve at the top for guiding the button 8, and the outer shell 7 has a spring guide post at the corresponding position; The upper part of button 8 is a cylindrical part with a ball head, and the lower part is a conical part with a blind hole in the inner cavity that mates with the button spring 9; The cylindrical section with a ball head of button 8 matches the size of the circular sleeve of base 1.

[0041] In this embodiment, a circular sleeve with an outer diameter of 8mm and protruding 3mm from the base body is provided on the top of the base 1 as a precision guide hole for the button 8. A spring guide post extends from the corresponding position of the outer shell 7. The button compression spring 9 is sleeved on the outside of the guide post and extends into the blind hole of the inner cavity of the button 8 to form a third spring damping layer. The upper section of the button 8 is a 6mm diameter cylindrical ball with a ball head, and the lower section is conical. The upper end face of the conical section just forms a step limit with the lower end face of the base 1. In the free state, the cylindrical ball with a ball head of the button 8 protrudes 4mm from the sleeve. The dynamic fit gap with the sleeve is controlled at the micron level, which not only prevents lateral shaking but also ensures that the button 8 can be pressed smoothly throughout its entire stroke. When button 8 is pressed down, the conical section rolls open the roller 4-6 of the conductive rod assembly 4, driving the conductor 4-2 to move a distance 0.5mm greater than the dynamic contact amount between it and the two spring pieces 2-3 on the side of the spring seat 2-2, forming overtravel protection and ensuring reliable contact separation. This overtravel is mechanically limited by the built-in limiting step structure 0.5mm before button 8 reaches the bottom of the housing 7, preventing the spring pieces 2-3 from continuing to deform, thereby reducing fatigue stress. Thus, the button pressure spring 9, the side pressure spring 5, and the conductive rod roller 4-6 together form a triple spring system that absorbs high vibration and strong impact energy. Combined with the overtravel protection of the limiting step, the switch maintains constant contact pressure throughout its 100,000 mechanical lifespan, significantly reducing fatigue wear of the spring pieces 2-3, and achieving a highly reliable, long-life, and mechanically robust flat micro switch.

[0042] This invention achieves high reliability, long lifespan, and excellent resistance to mechanical environments by using a base circular sleeve to precisely match the button, a triple spring system, and overtravel protection.

[0043] According to one embodiment of the present invention, the outer casing 7 is provided with a plurality of mounting sleeves on its side, and screws can pass through the mounting sleeves to fix the switch to an external device.

[0044] In this embodiment, four mounting sleeves extend symmetrically from the side of the outer casing 7. The outer contour of the sleeve is square, and the inner part has a pre-reserved circular through hole with a diameter of 3mm. The center distance between the upper and lower through holes is 33.3mm, and the center distance between the left and right through holes is 36mm, forming a rectangular distribution of rigid connection points. During installation, the screw passes through the sleeve to press the switch onto the external device. The outer square and inner circular structure of the sleeve prevents rotation and provides circumferential positioning. The four-hole matrix array effectively disperses impact and vibration loads, ensuring that the flat casing with a thickness of only 9mm still maintains zero contact displacement under high overload environment, realizing fast, reliable, and board-level installation without additional support.

[0045] This invention enables fast and reliable board-level installation of the switch through rectangular mounting sleeves distributed on the side of the outer shell, effectively dispersing impact and vibration loads and ensuring zero contact displacement under high overload conditions on the flat shell.

[0046] Example 2 According to one embodiment of this utility model, a cross-drive limit switch includes a drive structure, a conductive structure, and a contact spring structure, comprising a base 1, a contact spring mechanism 2, a central bushing 3, a conductive rod assembly 4, a side pressure spring 5, a stepped stop block 6, a housing 7, a button 8, a button pressure spring 9, and a pivot pin 10; wherein... The drive structure includes: a button 8 installed in a guide hole on the base 1 and a cylindrical button spring 9 installed on a guide post protruding inside the housing 7. The button spring 9 is placed in the blind hole inside the button 8 and fitted onto the spring guide post inside the housing 7.

[0047] The conductive structure includes: a fixed expansion riveting through the central bushing 3 and the central round rod of the outer shell, a conductive rod assembly 4 on the central round rod of the outer shell, and a roller 4-6 passing through a unique concave shape on the drive rod 4-4 via roller rivets 4-5, as well as an upper insulator 4-3, a lower insulator 4-1 and a conductor 4-2 installed at the tail of the drive rod 4-4.

[0048] The conductive rod assembly 4 includes symmetrical left and right conductive rod mechanisms. Each conductive rod mechanism includes a drive rod 4-4, a roller rivet 4-5, a roller 4-6, an upper insulator 4-3, a lower insulator 4-1, and a conductor 4-2. The main body of the conductive rod assembly 4, the drive rod 4-4, is square with a bend. One end of the drive rod 4-4 has a square groove, and each end of the groove has a circular through hole for the roller rivet 4-5 to pass through and fix the roller 4-6. A square through hole is opened below the groove, and the shaft pin 10 passes through the square through holes of the left and right conductive rod mechanisms and is fixed to both sides of the outer shell 7. A circular through hole is provided in the middle of the drive rod 4-4. This circular through hole is used to cooperate with the central bushing 3 to fix the left and right conductive rod mechanisms to the raised circular rod in the middle of the outer shell 7. The other end of the conductive rod assembly is a raised stepped cuboid and a round boss with a hole in the center. The cuboid here is used to install the upper insulator 4-3, the lower insulator 4-1 and the conductor 4-2. After the upper insulator 4-3, the conductor 4-2 and the lower insulator 4-1 are inserted in sequence, the round boss with a hole at the end is expanded and riveted. The conductor 4-2 is installed in the conductor mounting groove formed by the overlapping of the upper insulator 4-3 and the lower insulator 4-1.

[0049] The spring mechanism includes: an insulating spring seat 2-2 mounted on the outer casing 7, four conductive spring pieces 2-3, and an insulating spring seat cover 2-1. The spring seat 2-2 fits into the protruding round rod below the center of the inner cavity of the outer casing 7. The spring seat 2-2 is convex in shape, with two symmetrical square holes at each end. The inner cavity of the spring seat 2-2 has two symmetrical rectangular holes that run through the entire structure, serving as mounting holes for the spring pieces 2-3. The four arched spring pieces 2-3 with "V" bends pass through the square spring piece mounting holes at the bottom of the spring seat 2-2, with the "V" bends of the spring pieces 2-3 protruding outward from the center of the four square holes in the spring seat 2-2. After the 90-degree bend of the bent spring 2-3 is tightly fitted to the bottom of the convex spring seat 2-2, the lower end of the spring 2-3, which is the wire-welding end, has a circular through hole. The square spring seat cover 2-1, with its own raised square part, fits upward and presses against the two 90-degree bends in the middle of the spring 2-3 from below the spring seat 2-2 (pressed in along the installation direction of the spring 2-3). After the assembled contact spring mechanism 2 is fitted from top to bottom onto the two protruding round rods below the center of the outer shell 7, the ends of the protruding round rods of the outer shell 7 are riveted. The spring 2-3 of the contact spring mechanism 2 is connected to the external circuit through a wire.

[0050] The outer casing 7 is a rectangular prism tube, which is a separate part used to fix the conductive rod assembly 4 and the contact spring mechanism 2. Each of the four sides of the prism tube has a stepped platform that is recessed by 1 mm to mate with the base 1.

[0051] The rectangular inner cavity of the outer casing 7 has four protruding fixed round rods for assembly. Except for the first rod, which is a spring guide post, the other three are round rods with blind holes at the ends for riveting. The middle rod has a circular boss below it, while the two protruding round rods below, used to fix the contact spring mechanism 2, have blind holes at their tops. After the contact spring mechanism 2 is installed, it can be riveted and fixed. The recessed parts on the four sides of the outer casing 7 are used to mate with the base 1. There are two symmetrical circular mounting sleeves on each side of the lower end of the outer casing 7. During switch installation, screws can be passed through the mounting sleeves and fixed to the weapon system. Two concentric through holes are provided on the thin walls on both sides of the outer casing 7. During assembly, the shaft pin 10 is passed through the through holes on both sides of the outer casing and the stepped stop block 6, and then riveted and fixed at the other end of the shaft pin.

[0052] The base 1 is a rectangular thin-walled structure with a circular sleeve. The sleeve hole serves as a guide hole for the button 8, and an arc-shaped sealing groove is provided inside the hole. The rectangular thin-walled body of the base 1 is slightly smaller than the quadrangular prism at the opening of the outer shell 7. After the base 1 is installed into the outer shell 7, the joint is sealed by laser welding around the perimeter. Below the circular sleeve are two symmetrical through holes, which are external mounting holes used to mate with the two mounting through holes on the outer shell 7 for laser welding sealing.

[0053] The stepped stop block 6, the central bushing 3, the conductive rod assembly 4, and the left and right side compression springs 5 ​​are sequentially installed into the cavity of the outer shell 7. After passing the shaft pin 10 through these parts, it is riveted and secured at the end. The touch spring mechanism 2 is then installed into the two protruding positioning rods at the lower end of the outer shell 7. The three protruding positioning rods of the outer shell 7 are riveted and secured. The positioning rods of the outer shell 7 used to install the conductive rod assembly 4 are not locked by the central bushing 3, ensuring the flexibility of rotation of the two conductive rod mechanisms. Cable wires are connected to the terminals of each spring 2-3. Insulating sealant is filled into the cavity formed by the outer shell 7 and the spring seat cover 2-1. The button spring 9 is then fitted into the spring guide post of the outer shell 7, and the button 8 is installed onto the button spring 9. Finally, the button mounting hole on the base 1 is fitted into the button 8 and pressed downwards into the outer shell 7, followed by laser sealing.

[0054] When button 8 is in the free state, the "V"-shaped portions of the two springs 2-3 on each side of the spring mechanism 2 are connected to the conductor 4-2 under the drive of the left and right compression springs to the conductive rod assembly 4, thus connecting the two circuits. When button 8 is pressed down by external force, the left and right conductive rod mechanisms move in a fan-shaped motion under the push of the conical structure of button 8. At this time, the conductor 4-2 on the drive rod 4-4 separates from the "V"-shaped portions of the springs 2-3 of the spring mechanism 2, thereby disconnecting the two circuits.

[0055] It is installed in the weapon control system through the mounting holes of the outer shell 7 and the base 1. Its circuit switching operation principle is as follows: When button 8 is in a free state without external pressure, button spring 9 pushes button 8 up, causing button 8 to extend out of the button mounting hole of base 1. At the same time, the conductive rod assembly 4 installed below button 8 is not supported by the tapered structure at the lower end of button 8. Under the elastic force of left and right side springs 5, the two ends of the left and right conductive rod mechanisms tighten inward in a crisscross manner. At this time, one end of the left and right conductive rod mechanisms with the conductor 4-2 is in contact with the four spring pieces 2-3 on the contact spring mechanism 2, forming two sets of circuit paths.

[0056] When button 8 is pressed by external pressure, button 8 is pressed down to be flush with the upper port of base 1. The conical structure of button 8 moves downward, which opens the rollers 4-6 of the left and right conductive rod mechanisms. At the same time, under the action of the cross drive structure, the conductor 4-2 at the other end of the left and right conductive rod mechanisms separates from the spring 2-3 of the contact spring mechanism 2, thus breaking the two sets of circuit paths.

[0057] This invention utilizes a structure with three built-in springs to ensure the switch's vibration reduction and impact resistance. The reciprocating motion of the conical button 8 drives the cross-shearing motion of the left and right conductive rod mechanisms, thereby enabling the conductors 4-2 on the left and right conductive rod mechanisms to make cross-shearing contact with the spring plates 2-3 on the contact spring mechanism 2, achieving a long lifespan for the switch.

[0058] The installation method of the cross-drive limit switch of this utility model includes the following steps: Step S102: Insert the reed 2-3 into the spring seat 2-2 and press it into the spring seat cover 2-1 to form the spring contact mechanism 2; Step S104: Fit the spring contact mechanism 2 into the corresponding positioning rod of the outer shell 7 and fix it with riveting. Step S106: The assembled two conductive rod mechanisms are hinged together with the central bushing 3 to the first positioning round rod of the outer shell 7; after inserting the side compression spring 5, the stepped stop block 6 and the shaft pin 10, they are expanded and riveted to form a cross-shearing structure of the two conductive rod mechanisms. Step S108: Install the button spring 9 and the button 8 into the housing 7; seal the base 1 to the housing 7. Step S110: Weld the external wires to the spring 2-3 and seal with glue.

[0059] In this embodiment, the method for installing the cross-drive limit switch includes the following steps: Pre-assemble the spring contact mechanism 2: Insert four springs 2-3 into the rectangular through hole at the bottom of the spring seat 2-2, so that the "V"-shaped bend of each spring is exposed from the square hole on the side wall of the spring seat 2-2; then press the spring seat cover 2-1 into the spring seat 2-2, so that the convex strip of the spring seat cover 2-1 abuts against the 90° bend of the spring 2-3, forming an integrated spring contact mechanism 2.

[0060] Fixing the spring mechanism 2: Insert the spring mechanism 2 from top to bottom into the second positioning rod and the third positioning rod below the inner cavity of the outer shell 7 until the bottom surface of the spring seat 2-2 is in contact with the bottom surface of the inner cavity of the outer shell 7; expand and rivet the end of the positioning rod of the outer shell to lock the spring mechanism 2 axially inside the outer shell 7.

[0061] Assemble the conductive rod assembly 4: Embed the roller 4-6 into the groove at the front end of the drive rod 4-4, and insert the roller rivet 4-5 to allow the roller 4-6 to rotate freely; sequentially fit the upper insulator 4-3, the conductor 4-2, and the lower insulator 4-1 onto the end boss of the drive rod 4-4, and enlarge the center hole of the end boss to complete the single-sided conductive rod mechanism; complete the other side conductive rod mechanism in the same way; insert the center bushing 3 into the cross hinge hole of the two conductive rod mechanisms, and then fit both of them together into the first positioning round rod of the outer shell 7; then fit the two side compression springs 5 ​​into the two ends of the stepped stop block 6 respectively, and then pass the shaft pin 10 sequentially through the side wall through hole of the outer shell 7, the side compression spring 5, the hinge hole of the conductive rod mechanism, and the stepped stop block 6, and finally enlarge the two ends of the shaft pin 10 to form a rotatable cross shearing structure.

[0062] Install the button spring 9 and the button 8: Fit the button spring 9 into the spring guide post of the outer shell 7; align the blind hole of the inner cavity of the button 8 with the button spring 9 and press it down so that the cylindrical section of the button 8 with the ball head enters the circular sleeve of the base 1; at this time, the conical section of the button 8 is located between the two rollers 4-6.

[0063] Base 1 closing and sealing: Insert the circular sleeve of base 1 into button 8 and press it against the opening of housing 7 so that the through holes at the four corners of base 1 fit with the end face of the mounting sleeve of housing 7; perform circumferential laser welding along the mating gap to complete the airtight assembly of housing-base.

[0064] External circuit connection: Solder the external wires to the soldering ends of each spring 2-3 to form two redundant normally closed circuits; after soldering, fill the solder joints and the cable lead-out hole area of ​​the outer shell with insulating sealant to achieve environmental isolation and wire fixation.

[0065] Complete installation: Secure the switch to the weapon system mounting surface with screws using the mounting sleeves on the 7th side of the housing, thus completing the installation of the cross-drive limit switch.

[0066] This utility model's cross-drive limit switch mainly consists of a base 1, a contact spring mechanism 2, a conductive rod assembly 4, a central bushing 3, a side pressure spring 5, a stepped stop block 6, and a housing 7. A quadrangular prism-shaped conductor 4-2 is installed at the lower end of the drive rod 4-4, and an insulator separates the conductor 4-2 from the drive rod 4-4 to achieve insulation. Finally, the conductor 4-2 is fixed by riveting through the blind hole on the drive rod 4-4. Then, the roller rivet 4-5 and roller 4-6 at the upper end of the conductor 4-2 are installed, forming the conductive rod mechanism. The two conductive rod mechanisms are symmetrically installed via a central protrusion (first positioning round rod) on the housing 7, separated by a central bushing 3 to prevent wear during rotation. The touch spring mechanism 2 is fixedly installed below the central bushing 3 via protruding rods (second and third positioning rods) on the outer casing 7. Two "V"-shaped sections of spring plates 2-3 protrude from both sides of the touch spring mechanism 2. When no external force is applied to the button 8, the two conductive rod mechanisms tighten towards the center under the elastic force of the side springs 5. At this time, the conductor 4-2 at the lower end of the conductive rod assembly 4 also contacts the "V"-shaped sections of the protruding spring plates on both sides of the touch spring mechanism 2 under the elastic force of the side springs 5, closing the circuit and forming two normally closed circuits. When the button 8 is pressed down by an external force to its full stroke of 4mm, the two conductive rod mechanisms rotate under the drive of the lower conical end of the button 8, causing the lower conductor 4-2 to separate from the spring plates 2-3 of the touch spring mechanism 2, breaking the circuit. As the button 8 moves up and down, the conductor 4-2 undergoes a cross-cutting motion like "scissors," causing the conductor 4-2 to contact / separate from the spring plates 2-3. The switch contacts open and close quickly. When activated, conductor 4-2 will collide with spring 2-3, which can effectively break the oxide film and excess material of both, making the circuit connection stable and reliable.

[0067] The switch of this invention has two redundant contacts and a three-spring structure, which can withstand an acceleration of 400g / 1min, an impact of 400g / 10ms, and a mechanical life of 100,000 cycles. The installation height of the body is only 9mm, making it suitable for various control systems with small installation height and high requirements for the switching performance of electrical circuits.

[0068] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0069] It should be understood that the sequence number of each step in the utility model content and embodiments does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the utility model embodiments.

Claims

1. A cross-drive limit switch, comprising a base (1), characterized in that, The limit switch also includes a button (8), a conductive rod assembly (4), and a spring mechanism (2) disposed on the top surface of the base (1). The two ends of the spring mechanism (2) are respectively connected to the external circuit; Driven by the button (8), the conductive rod assembly (4) connects or separates from the spring mechanism (2) through cross-cutting motion, thereby realizing the on / off control of the external circuit.

2. The cross-drive limit switch according to claim 1, characterized in that, The limit switch further includes: side compression springs (5) disposed on the upper part of the base (1) and on both sides of the conductive rod assembly (4); The conductive rod assembly (4) includes two cross-hinged conductive rod mechanisms, each of which includes a drive rod (4-4), one end of which is provided with a roller (4-6) and the other end with a conductor (4-2). The lower section of the button (8) is a conical structure. In the free state, when the button (8) is not pressed down, the side pressure spring (5) pushes the two conductive rod mechanisms to cross and tighten inward, so that the conductor (4-2) contacts the contact spring mechanism (2) and the external circuit is connected. When the button (8) is pressed down, the conical section of the button (8) opens the two rollers (4-6), drives the two conductive rod mechanisms to rotate outward, and the conductor (4-2) separates from the contact spring mechanism (2) and the external circuit is disconnected.

3. The cross-drive limit switch according to claim 2, characterized in that, The spring mechanism (2) includes: an insulated spring seat (2-2). The spring seat (2-2) is provided with a plurality of conductive springs (2-3) arranged symmetrically on the left and right sides, and the "V"-shaped contact part of each spring (2-3) is exposed on the edge of the spring seat (2-2); When the conductor (4-2) comes into contact with the "V"-shaped contact portion of the reed (2-3), the external circuit is turned on.

4. The cross-drive limit switch according to claim 3, characterized in that, The spring-touch mechanism (2) further includes: an insulated spring seat cover (2-1); The spring seat cover (2-1) is disposed on the top of the spring seat (2-2) to limit and press the spring (2-3) to prevent the spring (2-3) from loosening or shifting.

5. The cross-drive limit switch according to claim 3, characterized in that: The spring seat (2-2) is provided with two springs (2-3) on each of its left and right sides. The two springs (2-3) on each side are electrically connected in parallel to form a double redundant path. During the shearing motion, the conductor (4-2) simultaneously contacts two springs (2-3) on the same side, forming a two-point parallel conduction structure.

6. The cross-drive limit switch according to claim 2, characterized in that, The limit switch also includes: a center bushing (3), a stepped stop block (6), and a pivot pin (10). The central bushing (3) is disposed between the cross hinge point of the two conductive rod mechanisms to isolate and reduce the friction between the two conductive rod mechanisms; The stepped stop block (6) is located between the two side compression springs (5), and the shaft pin (10) passes through the side compression spring (5) and connects to the stepped stop block (6).

7. The cross-drive limit switch according to claim 2, characterized in that, The conductive rod mechanism further includes: an upper insulator (4-3) and a lower insulator (4-1). The upper insulator (4-3) and the lower insulator (4-1) are both fitted onto the end of the drive rod (4-4), and a conductor mounting groove is formed between the upper insulator (4-3) and the lower insulator (4-1); the conductor (4-2) is disposed in the conductor mounting groove.

8. The cross-drive limit switch according to claim 2, characterized in that, The limit switch also includes a housing (7); The inner cavity of the outer shell (7) is provided with multiple positioning rods. The first positioning rod is used to fix the hinge point of the conductive rod assembly (4), and the second and third positioning rods are used to fix the contact spring mechanism (2). The upper sides of the outer shell (7) are provided with through holes corresponding to the positions of the side compression springs (5). The through holes are used to pass through the support structure that fixes the direction of the side compression springs (5).

9. The cross-drive limit switch according to claim 8, characterized in that, The limit switch also includes: a button spring (9); The base (1) has a circular sleeve at the top for guiding the button (8), and the outer shell (7) has a spring guide post at the corresponding position; The upper part of the button (8) is a cylindrical part with a ball head, the lower part is a conical part, and the inner cavity is provided with a blind hole that cooperates with the button compression spring (9); The cylindrical section with a ball head of the button (8) matches the size of the circular sleeve of the base (1).

10. The cross-drive limit switch according to claim 8, characterized in that: The outer casing (7) has multiple mounting sleeves on its side, through which screws can be passed to fix the switch to an external device.

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