A push button self-locking switch mechanism

Abstract

The application provides a button self-locking switch mechanism, which comprises a shell, a button, a push rod, a limiting piece, a spring, a pin shaft, a moving contact and a static contact; a sliding groove one is arranged in the limiting piece, sawteeth one and two are arranged at the front end of the limiting piece, a clamping groove is formed between the sawteeth one and two, the button extends into the limiting piece, sawteeth three are uniformly distributed on the front end surface of the button, the two ends of the push rod are movably connected with the button and the limiting piece respectively, a guide piece is arranged on the outer wall of the push rod and is slidably arranged in the sliding groove one, a guide inclined surface is arranged at the rear end of the guide piece, the moving contact is slidably arranged in the shell, the rear end of the moving contact is sleeved on the push rod, the front end of the moving contact points to the static contact and can contact the static contact under the pushing of the push rod, the spring is sleeved on the moving contact, and the pin shaft is inserted on the moving contact after penetrating through the gap of the spring wire. The application has a whole linear structure, occupies small space, is convenient to operate, and can stably realize the functions of closing locking and opening unlocking of the push rod and the moving contact.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electrical switch technology, specifically relating to a button self-locking switch mechanism. Background Technology

[0002] Miniature switches are currently the most widely used type of switch. However, when using existing miniature switches, it is necessary to manually rotate the switch button by a large angle or to directly press and pull the button to open or close the circuit. This results in a large space occupation and inconvenient operation. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a button self-locking switch mechanism that occupies little space and is easy to operate.

[0004] The objective of this invention is achieved through the following technical solution: A button self-locking switch mechanism includes a housing, and a button, a push rod, a limiting member, a spring, a pin, a moving contact, and a stationary contact arranged in a straight line within the housing. The limiting member is a cylindrical body fixed inside the housing and open at both ends. Multiple grooves are provided along the length of the inner wall of the limiting member. A serration 1 and a serration 2 are provided at the front end of the limiting member (the end furthest from the button) between any two adjacent grooves. A recessed groove is formed between the serration 1 and the serration 2, facing towards the button. The rear end of the button is located outside the housing, and the front end (from the rear end of the limiting member) extends into the limiting member and can slide back and forth within it. Multiple serration 3 are evenly distributed in a ring on the front end face of the button, each serration corresponding to a groove 1 and a groove 2. The push rod is a hollow cylindrical body closed at the rear end and open at the front end. The rear end of the push rod is movably connected to the button, and the front end is movably fitted inside the limiting member. A groove is provided along the length of the push rod. A directional protruding guide member is slidably installed in a slide groove and can slide forward out of a limiting member. At the rear end of the guide member is a guide ramp that mates with the three toothed surfaces of the sawtooth (the direction in which the guide ramp mates with the toothed surfaces of the sawtooth determines the direction the guide member slides towards the bottom of the groove after sliding out of the limiting member, i.e., the guide member and push rod rotate in that direction). When the guide member is located in the slide groove and the slot, the rear end of the guide ramp does not contact the bottom of the three-toothed groove (there is a travel difference). The moving contact is slidably installed in the housing, its rear end is sleeved in the push rod, and its front end points towards the stationary contact and can contact the stationary contact when pushed by the push rod. The spring is sleeved outside the moving contact, its rear end extends into the push rod, and its front end abuts against the housing. The pin passes through the gap in the spring wire in the middle of the spring and is inserted into the moving contact. At least one end of the pin is located outside the spring and can compress the spring towards the stationary contact under external force.

[0005] Furthermore, the depth of the slot is greater than or equal to the depth of the slide groove, ensuring that the guide can smoothly slide from the slide groove into the slot to achieve the closing and locking.

[0006] Furthermore, a second slide groove is provided between each of the two adjacent slide grooves on the inner wall of the limiting member, which is arranged along its length direction to provide guidance for the button; the second slide groove is connected to the slot, the depth of the second slide groove is less than the depth of the slot, and the slot is located in front of the second slide groove.

[0007] Furthermore, a slider is provided on the outer wall of the front end of the button corresponding to each slide groove one and slide groove two, and the slider can slide back and forth along slide groove one and slide groove two.

[0008] Furthermore, the guide slope engages with the clockwise tooth surface of the sawtooth three. After the guide slides out of the front end of the limiting member, under the push of the button (forward), the guide slides along the clockwise tooth surface of the sawtooth three towards the bottom of the groove, thereby causing the guide and the push rod to rotate clockwise.

[0009] Furthermore, the first and second saw teeth are arranged in a clockwise direction and both of their clockwise-facing surfaces are inclined surfaces; at the same time, the counterclockwise-facing surface of the first saw tooth is aligned with the clockwise-facing surface of the first slide groove, and the counterclockwise-facing surface of the second saw tooth is aligned with the clockwise-facing surface of the second slide groove.

[0010] Furthermore, both ends of the pin are located outside the spring and can compress the spring towards the stationary contact under the action of external force, and the pin is perpendicular to the moving contact.

[0011] Furthermore, the moving contact is slidably installed inside the housing via a guide groove pre-set within the housing.

[0012] Furthermore, a baffle (for supporting the spring) is provided between the guide groove and the limiting member. The front end of the spring rests on the baffle, while the rear end of the moving contact moves through a pre-set groove on the baffle and extends into the push rod.

[0013] Furthermore, the stationary contact is installed inside the housing via a mounting groove pre-set within the housing; the mounting groove is connected to the guide groove, and the moving contact slides into the mounting groove through the guide groove to contact the stationary contact.

[0014] The beneficial effects of this invention are as follows: The button self-locking switch mechanism of the present invention has an overall straight-line structure, which occupies little space and is easy to operate. It can stably realize the functions of closing and locking of the push rod and moving contact and opening and unlocking. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1This is an exploded structural diagram of the button self-locking switch mechanism described in this invention; Figure 2 This is a schematic diagram of the self-locking button switch mechanism of the present invention in the open state; Figure 3 This is a schematic diagram of the structure of the button self-locking switch mechanism of the present invention when the guide component has slid out of the rear end of the limiting component; Figure 4 This is a schematic diagram of the structure of the button self-locking switch mechanism of the present invention when the guide component has slid out of the rear end of the limiting component; Figure 5 This is a schematic diagram of the self-locking button switch mechanism of the present invention in the closed state; Figure 6 This is a schematic diagram of the limiting component in the button self-locking switch mechanism of the present invention; Figure 7 This is a front view of the limiting component described in this invention; Figure 8 for Figure 7 A cross-sectional view along the AA direction; As shown in the figure: 1-Button, 11-Slider, 12-Sawtooth 3, 2-Push rod, 21-Guide component, 22-Guide slope, 3-Limit component, 31-Slide groove 1, 32-Sawtooth 1, 33-Slot, 34-Sawtooth 2, 35-Slide groove 2, 4-Spring, 5-Pin, 6-Moving contact, 7-Stationary contact, 8-Housing, 81-Guide groove, 82-Baffle. Implementation

[0017] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0019] like Figure 1-5 As shown, the button self-locking switch mechanism described in this embodiment includes a housing 8, and the following components arranged in a straight line (from back to front) inside the housing: button 1, push rod 2, limit member 3, spring 4, pin 5, moving contact 6, and stationary contact 7.

[0020] The limiting member 3 is a cylindrical body fixed inside the housing 8 and open at both ends. Multiple grooves 31 (four in this embodiment) are provided along the length of the inner wall of the limiting member 3, serving as sliding channels between the slider 11 on the outer wall of the button 1 and the guide 21 on the outer wall of the push rod 2. At the front end of the limiting member 3 (the end furthest from the button 1), between any two adjacent grooves 31, are serrations 32 and 34 (e.g., ...). Figure 1 Enlarged view of a section at point 3a and Figure 6-8 (As shown); a recessed groove 33 is formed between sawtooth 1 32 and sawtooth 2 34, facing the button 1. The depth of the groove 33 is equal to the depth of the slide groove 1 31. A slide groove 2 35 is provided along the length of each of any two adjacent slide grooves 1 31 on the inner wall of the limiting member 3 (in this embodiment, there are four slide grooves 2 35, serving as sliding channels for the slider 11 on the outer wall of the button 1); the slide groove 2 35 communicates with the groove 33, the depth of the slide groove 2 35 is less than the depth of the groove 33, and the groove 33 is located in front of the slide groove 2 35. Sawtooth 1 32 and sawtooth 2 34 are arranged clockwise, and both have inclined surfaces (32a and 34b) facing clockwise; simultaneously, the surface of sawtooth 1 32 facing counterclockwise is aligned with the surface of slide groove 1 31 facing clockwise, and the surface of sawtooth 2 34 facing counterclockwise is aligned with the surface of slide groove 2 facing clockwise.

[0021] The rear end of the button 1 is located outside the housing 8, and the front end (from the rear end of the limiting member 3) extends into the limiting member 3 and can slide back and forth within the limiting member 3; multiple serrated teeth 12 (e.g., 12) are evenly distributed in a ring on the front end face of the button 1. Figure 1 and Figure 1 (As shown in the enlarged view at point 1b), the sawtooth 12 corresponds one-to-one with the slide groove 31 and the slot 33 (there are 8 sawtooth 12). A slider 11 is provided on the outer wall of the front end of button 1, corresponding to each slide groove 31 and slide groove 35 (e.g., ...). Figure 1 and Figure 1 (As shown in the enlarged view at point 1a), the slider 11 can slide back and forth along the first slide groove 31 and the second slide groove 35, providing guidance for the sliding of the button 1.

[0022] The push rod 2 is a hollow cylinder with a closed rear end (rod-shaped) and an open front end (cylindrical). The rear end of the push rod 2 is movably connected to the button 1 (the rear end of the push rod 2 is rotatably fitted into a pre-set hole at the front end of the button 1), and the front end of the push rod 2 is movably fitted into the limiting member 3 (allowing it to slide back and forth along the limiting member 3). A guide member 21 protruding along the length direction is provided on the outer wall of the push rod 2 (e.g., Figure 1 and Figure 1(As shown in the enlarged view at point 2a), the guide member 21 is slidably installed in the slide groove 31 and can slide forward out of the limiting member 21 (the guide member 21 has a long strip structure, slides in cooperation with the slide groove 31, moves linearly along the slide groove 31, and at the same time the slide groove 31 restricts the rotation of the guide member 21). At the rear end of the guide member 21, there is a guide slope 22 that contacts and cooperates with the clockwise inclined tooth surface of the serration 3 12 (as shown in the enlarged view at point 2a). Figure 1 and Figure 1 As shown in the enlarged view at point 2a, when the guide slope 22 faces counterclockwise and the guide member 21 is located within the slide groove 31 and the slot 33, the rear end of the guide slope 22 does not contact the bottom of the tooth groove of the sawtooth 12. That is, there is a travel difference between the guide member 21 and the button 1. After the guide member 21 slides out of the limiting member 3, the slide groove 31 of the limiting member 3 no longer restricts the guide member 21. If the button 1 is pushed further, under the guidance of the clockwise tooth surface of the sawtooth 12, the rear end of the guide slope 22 will slide towards the bottom of the tooth groove of the sawtooth 12, thereby causing the guide member 21 to move. When the guide 21 deflects clockwise, it is no longer aligned with the slide groove 31 (the guide 21 is misaligned). The deflection of the guide 21 causes the push rod 2 to rotate clockwise. Then, the button 1 is released. At this time, the guide slope 22 of the guide 21 contacts and engages with the clockwise slope 32a of the sawtooth 32. Under the action of the spring 4's return force, the guide slope 22 of the guide 21 slides along the slope 32a of the sawtooth 32. The guide 21 continues to rotate clockwise until it slides into the slot 33, locking the push rod 2 onto the limit member 3.

[0023] The moving contact 6 is slidably installed inside the housing 8, with its rear end (rotatable) sleeved inside the push rod 2, and its front end pointing towards the stationary contact 7 and able to contact the stationary contact 7 under the push of the push rod 2; the moving contact 6 passes through a guide groove 81 (such as a guide groove 81) pre-set inside the housing 8. Figure 1 and Figure 1 (As shown in the enlarged view at point 8a) It is slidably installed inside the housing 8. The moving contact 6 is composed of a plate-shaped body and a rod-shaped body (one piece) that are slidably disposed in the guide groove 81. The rod-shaped body is sleeved outside the spring 4 and extends into the push rod 2.

[0024] The spring 4 is sleeved outside the moving contact 6, with its rear end extending into the push rod 2 and its front end abutting against the housing 8 (the rear side of the baffle 82). Under the elastic force of the spring 4, the push rod 2 reciprocates within the limiting member 3, passing through the serrated features of varying depths on the inner wall of the limiting member 3 (such as...). Figure 1 The stroke difference formed by the sawtooth 1 and sawtooth 2 shown in the enlarged view at point 3a limits the displacement of push rod 2, thereby realizing the locking function of button 1.

[0025] like Figure 1 and Figure 1As shown in the enlarged view at point 8a, a baffle 82 is provided between the guide groove 81 and the limiting member 3. The front end of the spring 4 rests on the rear side of the baffle 82, while the rear end of the moving contact 6 moves through the preset groove on the baffle 82 and extends into the push rod 2.

[0026] The pin 5 passes vertically through the gap in the spring wire in the middle of the spring 4 and is inserted into the moving contact 6 (rod-shaped body). Both ends of the pin 5 are located outside the spring 4 and can compress the spring 4 towards the stationary contact 7 under external force. The pin 5 is a cotter pin, and it is inserted perpendicularly into the rod-shaped body of the moving contact 6. When the circuit is opened, the spring 4 returns to its original position and pushes the pin 5 backward. The pin 5 then drives the moving contact 6 backward to separate from the stationary contact 7, thus opening the circuit.

[0027] The stationary contact 7 is installed inside the housing 8 through a mounting groove pre-set in the housing 8; the mounting groove is connected to the guide groove 81, and the moving contact 6 slides into the mounting groove through the guide groove 81 to contact the stationary contact 7.

[0028] I. From opening to closing (moving contact from...) Figure 2 The state transition shown is to Figure 5 (as shown in the image), the steps are as follows: (1) such as Figure 2 As shown, when the rear end of button 1 is pressed by hand, button 1 moves forward along slide groove 31 and slide groove 35 within the limiting member 3 via the slider 11 on its front side wall, pushing push rod 2 to slide forward within the limiting member 3. At the same time, push rod 2 also pushes moving contact 6 forward, and guide member 21 on the outer wall of push rod 2 also slides forward along slide groove 31. During the forward movement of push rod 2 within the limiting member 3, spring 4 is compressed (at the same time, pin 5 also compresses spring 4 towards baffle 82), and spring 4 stores energy.

[0029] (2) such as Figure 3 As shown, after the guide member 21 (rear end) slides completely forward out of the limiting member 3 (front end), the button 1 is pushed forward a certain distance so that the moving contact 6 and the stationary contact 7 are fully in contact, and the circuit is closed. At this time, since the guide member 21 is no longer restricted by the sliding groove 31 in the limiting member 3 (the push rod 2 is rotatably sleeved in the limiting member 3 and the button 1, so it can rotate under the premise that there is no external restriction), it is in a rotatable state. Under the push of the button 1, the guide slope 22 at the rear end of the guide member 21 slides along the slope of the sawtooth 3 12 near the clockwise side to the bottom of the tooth groove of the sawtooth 3 12 (from the... Figure 2As shown, before the guide member 21 slides out of the slide groove 31, the guide slope 22 at the rear end of the guide member 21 contacts and engages with the slope of the sawtooth 32 on the clockwise side. At the same time, there is a travel difference between the guide slope 22 of the guide member 21 and the slope of the sawtooth 32 of the button 1. The guide member 21 rotates clockwise and is misaligned with the slide groove 31. It is no longer aligned with the slide groove 31 and faces the slope 32a on the clockwise side of the sawtooth 32.

[0030] (3) such as Figure 4 As shown, when button 1 is released, under the action of spring 4 and pin 5, push rod 2 moves button 1 backward (resets) a small distance (spring 4 remains compressed). The front end of button 1 springs back into limit member 3. Due to the misalignment between guide member 21 and slide groove 31, when push rod 2 springs back, guide member 21 has difficulty returning to slide groove 31 and is blocked by limit member 3. At this time, guide slope 22 of guide member 21 contacts and engages with the clockwise slope 32a of sawtooth 32. Afterward, as... Figure 5 As shown, under the action of the spring force of the spring 4, the guide 21 continues to slide towards the slot 33 along the inclined surface 32a in the clockwise direction of the sawtooth 32 until it slides to the bottom of the slot 33 and is locked by the slot 33 (making it difficult to continue sliding). This makes the push rod 2 locked by the slot 33 of the limiting member 3 and difficult to move further. At this time, the push rod 2 continues to compress the spring 4 (the spring 4 remains in a compressed state), and the pin 5 is still subject to the action of the spring 4. Under the action of the spring force of the spring 4, the moving contact 6 still maintains reliable contact with the stationary contact 7, completing the closing lock.

[0031] II. From closing to opening (moving contact from...) Figure 5 The state transition shown is to Figure 2 (as shown in the image), the steps are as follows: (1) such as Figure 5 As shown, at this time, the guide 21 is located in the slot 33 on the front side of the slide groove 35 and is directly opposite a serration 3 12 at the front end of the button 1. The clockwise tooth surface of the serration 3 12 has a travel difference with the guide slope 22 of the guide 21 (the front end of the guide slope 22 does not contact the bottom of the tooth groove of the serration 3 12). When the rear end of the button 1 is pressed by hand, the button 1 moves forward in the limiting member 3 and pushes the push rod 2 to move forward (a short distance) in the limiting member, compressing the spring 4.

[0032] (2) The guide 21 slides forward out of the slot 33 at the rear end until it slides out of the front end of the limiting member 3 again. The guide 21 is no longer restricted by the slot 33 in the limiting member 3 (the push rod 2 and the guide 21 are in a rotatable state). If the button 1 is pushed, the guide slope 22 at the rear end of the guide 21 slides along the slope of the sawtooth 3 12 on the clockwise side to the bottom of the tooth groove. The guide 21 continues to rotate clockwise, and is misaligned with the slot 33 and faces the slope 34a of the sawtooth 2 34 in the clockwise direction.

[0033] (3) When button 1 is released, under the action of the spring force of spring 4 and pin 5, push rod 2 moves button 1 backward (resets) a small distance (spring 4 remains compressed). The front end of button 1 springs back into the limiting part 3. Due to the misalignment of guide part 21 and slot 33, when push rod 2 springs back, guide part 21 moves directly toward sawtooth 34, so that the guide slope 22 of guide part 21 contacts and engages with the clockwise slope 34a of sawtooth 34. Then, under the further force of spring 4... Under the action of the step, the guide member 21 slides along the clockwise inclined surface 34a of the sawtooth 2 34 towards the clockwise slide groove 31 until it slides into the slide groove 31, releasing the lock on the guide member 21 in the straight direction. Under the action of the spring 4, the guide member 21 continues to move backward and reset along the slide groove 31. At the same time, the spring 4 releases energy and pushes the pin 5 to move towards the button 1. The pin 5 drives the moving contact 6 to move towards the button 1 and reset, moving away from the stationary contact 7, thus completing the opening of the circuit breaker. Figure 2 The lockout status is shown.

[0034] The closing and opening of the circuit breaker are achieved by repeatedly rotating the push rod 2 and the guide 21 clockwise by pressing the button 1.

[0035] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A push button self-locking switch mechanism, comprising a housing, and a button, a push rod, a limiting member, a spring, a pin, a moving contact, and a stationary contact arranged in a straight line within the housing; The limiting member is a cylindrical body fixed inside the housing and open at both the front and rear ends. Multiple sliding grooves are provided along the length of the inner wall of the limiting member. A serration 1 and a serration 2 are provided at the front end of the limiting member between any two adjacent sliding grooves. A groove is formed between the serration 1 and the serration 2, which is recessed towards the button. A sliding groove 2 is provided between each of the two adjacent sliding grooves 1 on the inner wall of the limiting member, which is arranged along the length of the limiting member. The sliding groove 2 is connected to the groove, and the depth of the sliding groove 2 is less than the depth of the groove. The groove is located in front of the sliding groove 2. The rear end of the button is located outside the housing, and the front end extends into the limiting member and can slide back and forth within the limiting member; multiple serrations are evenly distributed in a ring on the front end face of the button, and the serrations correspond one-to-one with the slide groove and the slot; a slider is provided on the outer wall of the front end of the button corresponding to each slide groove and the slide groove, and the slider can slide back and forth along the slide groove and the slide groove. The push rod is a hollow cylinder with a closed rear end and an open front end. The rear end of the push rod is movably connected to the button, and the front end is movably fitted inside the limiting member. A guide member protruding along the length direction is provided on the outer wall of the push rod. The guide member is slidably installed in the first slide groove and can slide forward out of the limiting member. A guide inclined surface that mates with the tooth surface of the three serrations is provided at the rear end of the guide member. When the guide member is located in the first slide groove and the slot, the rear end of the guide inclined surface does not contact the bottom of the three tooth grooves. The guide inclined surface mates with the clockwise tooth surface of the three serrations. The first and second serrations are arranged in a clockwise direction, and both of their clockwise-facing surfaces are inclined surfaces. At the same time, the counterclockwise-facing surface of the first serration is aligned with the clockwise-facing surface of the first slide groove, and the counterclockwise-facing surface of the second serration is aligned with the clockwise-facing surface of the second slide groove. The moving contact is slidably installed inside the housing, with its rear end sleeved inside the push rod, and its front end pointing towards the stationary contact and able to contact the stationary contact when pushed by the push rod. The spring is sleeved outside the moving contact, with its rear end extending into the push rod and its front end pressing against the housing. The pin passes through the gap in the spring wire in the middle of the spring and is inserted into the moving contact. At least one end of the pin is located outside the spring and can compress the spring towards the stationary contact under the action of external force. Both ends of the pin are located outside the spring and can compress the spring towards the stationary contact under the action of external force. The pin is perpendicular to the moving contact.

2. The button self-locking switch mechanism according to claim 1, characterized in that: The depth of the slot is greater than or equal to the depth of the slide.

3. The button self-locking switch mechanism according to claim 1 or 2, characterized in that: The moving contact is slidably installed inside the housing via a guide groove pre-set inside the housing.

4. The button self-locking switch mechanism according to claim 3, characterized in that: A baffle is provided between the guide groove and the limiting member. The front end of the spring rests on the baffle, while the rear end of the moving contact moves through the pre-set groove on the baffle and extends into the push rod.

5. The button self-locking switch mechanism according to claim 3, characterized in that: The stationary contact is installed inside the housing through a mounting groove pre-set in the housing; the mounting groove is connected to the guide groove, and the moving contact slides into the mounting groove through the guide groove to contact the stationary contact.

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