Self-locking structure and relay

Abstract

The invention provides a self-locking structure and a relay, and relates to the technical field of relays, a pushing piece is movably connected with a movable spring assembly, a transmission piece is provided with a rotating axis part, the transmission piece rotates on a fixed axis based on the rotating axis part, the transmission piece is movably connected with the pushing piece, and the pushing piece and the movable spring assembly have a first acting position; the transmission piece and the pushing piece are provided with a second acting position, and a connecting line among the first acting position, the second acting position and the rotating axis part can tend to be straight or be straight when the contact is closed. When the movable contact and the static contact are closed, the transmission piece abuts against the pushing piece to form a dead point structure state, the dead point structure state cannot be separated when no external force driving effect exists, the self-locking function is achieved, the contact closing state of the movable contact and the static contact is kept, low-cost and high-stability self-locking control over the action final position is achieved, the structural stability is guaranteed, and mistaken release is avoided. The problems of insufficient reliability in structural design and the like are solved, and meanwhile the anti-short-circuit effect can be effectively achieved through the self-locking structure.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a self-locking structure and a relay. Background Art

[0002] The actuators in relays often need to perform push-pull and pull-type actions. However, without a suitable retaining structure to maintain the actuator's motion after completing these actions, the actuators can easily release accidentally due to reaction force, vibration, or unstable power supply.

[0003] Currently, the holding structure can maintain the state of the actuator through springs and magnets, or adopt an electronically controlled locking mechanism to maintain the state of the actuator, or maintain the state of the actuator based on rebound buffering of specific materials.

[0004] However, the methods currently used have technical problems such as dependence on high-precision accessories, high manufacturing costs, sensitivity to the use environment, and insufficient reliability. Summary of the Invention

[0005] Based on this, it is necessary to provide a self-locking structure and a relay to address the above-mentioned technical problems.

[0006] The present application provides a self-locking structure, which includes:

[0007] Dynamic spring assembly;

[0008] a pushing member, the pushing member being movably connected to the dynamic spring assembly;

[0009] A transmission member, wherein the transmission member is provided with a rotating shaft portion, the transmission member rotates around the rotating shaft portion, and the transmission member is movably connected to the pushing member;

[0010] The pushing member and the dynamic spring assembly have a first action position, the transmission member and the pushing member have a second action position, and the connecting line between the first action position, the second action position and the rotating shaft center portion can tend to a straight line or be a straight line when the contact is closed.

[0011] In one embodiment, the dynamic spring assembly is provided with a power receiving portion, and the pushing member is provided with a power output portion, the pushing member is engaged with the power receiving portion of the dynamic spring assembly through the power output portion, and the first action position is defined between the power output portion and the power receiving portion; and / or,

[0012] The transmission member is provided with a transmission output portion, the pushing member is provided with a limiting track, and the transmission output portion is slidably assembled along the limiting track; and / or,

[0013] The transmission member is provided with a transmission input portion, and the transmission input portion is configured to receive a driving force from a driving source.

[0014] In one embodiment, when the contacts are closed or open, the power output part and the power receiving part respectively have two different first action positions.

[0015] In one embodiment, the power output part is configured as a yield groove opened in the pushing member, and the power receiving part includes a main body receiving section and a limiting bending section located at both ends of the main body receiving section. The main body receiving section of the power receiving part is passed through the yield groove, and the two limiting bending sections are configured to cooperate with the pushing member in a limiting manner.

[0016] In one embodiment, the power receiving unit further includes:

[0017] A compression spring member, wherein the fixed end of the compression spring member is connected to the lower end of the dynamic spring assembly, the movable end of the compression spring member is inserted into the recess, and the compression spring member is provided with a stress release portion.

[0018] In one embodiment, a first convex bulge is provided in the recess, and the main receiving section of the power receiving part abuts against the first convex bulge; when the contact is disconnected, the action position between the main receiving section and the first convex bulge is one of the first action positions; and / or,

[0019] A second convex bud is provided in the recess, and the compression spring member is in contact with the second convex bud; when the contact is closed, the action position between the compression spring member and the second convex bud is one of the first action positions.

[0020] In one embodiment, the driving source includes a driving gear, the transmission input portion is configured as a sector-shaped transmission tooth, and the driving gear is drivingly engaged with the sector-shaped transmission tooth.

[0021] In one embodiment, the limiting track is configured as an elongated hole opened in the pushing member, and the transmission output portion is configured as a sliding convex shaft provided on the transmission member, and the sliding convex shaft is slidably assembled in the elongated hole.

[0022] In one embodiment, the sliding protrusion is in abutment contact with the elongated hole via two action positions, and one of the two action positions is configured as the second action position.

[0023] The present application provides a relay, which includes the self-locking structure.

[0024] In the aforementioned self-locking structure and relay, when the line connecting the first operating position, the second operating position, and the rotating axis can approach a straight line or completely presents a straight line, the moving contact will stably contact the static contact, and the moving and static contacts will be in a closed state. In addition, the transmission member can also support the pusher, forming a dead point structural state. In the absence of external driving force, the dead point structural state cannot be disengaged, thereby realizing the self-locking function, effectively maintaining the contact closed state of the moving and static contacts, achieving low-cost and highly stable self-locking control of the action end position, and ensuring structural stability to avoid accidental release, thereby resolving technical problems such as insufficient reliability in structural design. The self-locking structure also effectively achieves short-circuit resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of the self-locking structure when the contacts are closed provided in one embodiment of the present application.

[0026] Figure 2 For example Figure 1 A partially enlarged structural schematic diagram of the self-locking structure shown.

[0027] Figure 3 For example Figure 1 Rear view of the self-locking mechanism shown when the contacts are closed.

[0028] Figure 4 For example Figure 1 A side view of the self-locking mechanism shown when the contacts are closed.

[0029] Figure 5 For example Figure 1 A perspective view of the self-locking structure when the contacts are closed is shown.

[0030] Figure 6 This is a front view of the self-locking structure when the contacts are disconnected provided in one embodiment of the present application.

[0031] Figure 7 For example Figure 6 Rear view of the self-locking mechanism shown when the contacts are open.

[0032] Figure 8 For example Figure 6 A side view of the self-locking structure shown when the contacts are open.

[0033] Figure 9 For example Figure 6 A perspective view of the self-locking structure when the contacts are open is shown.

[0034] Figure 10 This is a front view of the self-locking structure when the contacts are closed provided in another embodiment of the present application.

[0035] Figure 11 For example Figure 10 A side view of the self-locking structure shown when the contacts are open.

[0036] Figure Number:

[0037] 100, moving contact; 200, static contact;

[0038] 1000, dynamic spring assembly; 2000, pushing member; 3000, transmission member; 4000, driving source;

[0039] 1100, power receiving part; 1200, dynamic spring lead end;

[0040] 1110, main body receiving section; 1120, limiting bending section; 1130, compression spring member;

[0041] 1131, stress relief unit;

[0042] 2100, power output unit; 2200, limit rail;

[0043] 2110, first convex bract; 2120, second convex bract;

[0044] 3100, rotating shaft; 3200, transmission output; 3300, transmission input. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0051] This application provides a relay that can achieve contact and separation between a movable contact 100 and a stationary contact 200 by performing a "push-pull" action. The relay provided by this application includes a self-locking structure that maintains the relay's motion state after completing the "push-pull" action, thereby maintaining a relatively stable state between the movable contact 100 and the stationary contact 200. This purely mechanical retention mechanism, which does not rely on external structures such as electrical components and elastic materials, provides a stable structure and eliminates the need for additional material, processing, and control costs.

[0052] See Figures 1 to 5 , Figures 1 to 5 The state shown is the state of the self-locking structure when the relay is in the contact closed state, that is, the state in which the moving contact 100 and the static contact 200 are in contact with each other. Figures 6 to 9 , Figures 6 to 9 The state shown is the structural state of the self-locking structure when the relay is in a contact-off state, that is, the state in which the moving contact 100 and the static contact 200 are separated from each other.

[0053] See also Figures 1 to 9 As shown, the self-locking structure may include a dynamic spring assembly 1000, a pusher 2000, and a transmission member 3000. The pusher 2000 is movably connected to the dynamic spring assembly 1000, allowing the relative positional relationship between the pusher 2000 and the dynamic spring assembly 1000 to change. The movably connected pusher 2000 and the dynamic spring assembly 1000 enable the two to have a first active position. The transmission member 3000 is provided with a rotation axis 3100. The transmission member 3000 rotates about the rotation axis 3100, thereby transmitting power (acting force) through the movably connected rotation. The transmission member 3000 is movably connected to the pusher 2000, allowing the relative positional relationship between the transmission member 3000 and the pusher 2000 to change. The movably connected transmission member 3000 and the pusher 2000 enable the two to have a second active position.

[0054] See Figure 1 In the contact closed state shown, the line connecting the first operating position, the second operating position, and the rotating shaft portion 3100 can be linear or straight when the contacts are closed. Because the transmission member 3000 rotates around the rotating shaft portion 3100, the fixed-axis rotation controls the reciprocating motion of the pusher 2000, transmitting power (acting force) and achieving motion control of the movable contact 100.

[0055] So, if Figures 1 to 5As shown, when the line connecting the first action position, the second action position, and the rotating shaft portion 3100 can approach a straight line or appear as a straight line, the moving contact 100 will stably contact the static contact 200, and the transmission member 3000 can also support the push member 2000, and is in a dead point structural state. It can also be understood that the force acting on the push member is along the extension direction of the transmission member and passes through the rotating shaft portion 3100, which can resist external perturbations, and in the absence of external driving force, it cannot escape from the dead point structural state, thereby achieving a self-locking function. When approaching a straight line state, the maximum allowable deviation angle can also be determined based on the friction angle. Within the range of the designed maximum allowable deviation angle, effective self-locking can be achieved, anti-interference can be achieved, and the structure can be maintained in a stable geometric shape (structure).

[0056] When the movable contact 100 and the stationary contact 200 are closed, the line connecting the first operating position, the second operating position, and the rotating shaft 3100 tends to be straight or appears to be a straight line. The transmission member 3000 presses against the pusher 2000, forming a dead-point structure. The self-locking position is locked, preventing the movement from exiting this dead-point structure. To release this dead-point structure, the motor can be rotated in the opposite direction. This reverse rotation releases the self-locking mechanism, allowing the movable contact 100 and the stationary contact 200 to separate from each other.

[0057] When the movable contact 100 and the stationary contact 200 are closed, they reach the self-locking state. Even if a high current flows through the relay, the transmission member 3000 presses against the pusher 2000, creating a dead-center position. This resists the electrodynamic repulsive force that would separate the movable and stationary contacts 100 and 200, effectively preventing the relay from shorting out. This self-locking process relies on purely mechanical retention, independent of external components such as electrical controls and elastic materials. The resulting structure is stable and eliminates the need for high-precision components, reducing material, processing, and control costs. This results in high product reliability.

[0058] The transmission member 3000, the pushing member 2000 and the dynamic spring assembly 1000 are in a state of force balance, thereby achieving self-locking between the transmission member 3000, the pushing member 2000 and the dynamic spring assembly 1000. When no external power is continuously transmitted, the contact closed state of the dynamic contact 100 and the static contact 200 can be effectively maintained through the force balance state between the transmission member 3000, the pushing member 2000 and the dynamic spring assembly 1000.

[0059] Continue reading Figure 1 and Figure 2As shown, in one embodiment, the dynamic spring assembly 1000 is provided with a power receiving portion 1100, and the pushing member 2000 is provided with a power output portion 2100. In this case, the pushing member 2000 can be engaged with the power receiving portion 1100 of the dynamic spring assembly 1000 through the power output portion 2100, and the dynamic spring assembly 1000 and the pushing member 2000 are movably connected based on the engagement. When the power output portion 2100 is engaged with the power receiving portion 1100, the power output portion 2100 and the power receiving portion 1100 come into contact with each other, forming the first active position mentioned above between the power output portion 2100 and the power receiving portion 1100.

[0060] When the movable connection between the dynamic spring assembly 1000 and the pushing member 2000 is achieved based on the snap-fitting, the snap-fitting will cause relative movement between the dynamic spring assembly 1000 and the pushing member 2000. In one embodiment, when the relay is in a closed contact state or when the contacts are open, the power output part 2100 of the pushing member 2000 and the power receiving part 1100 of the dynamic spring assembly 1000 can have two different first action positions due to the change of the snap-fitting state, that is, in different snap-fitting states, the power output part 2100 of the pushing member 2000 and the power receiving part 1100 of the dynamic spring assembly 1000 will contact each other and snap-fit ​​based on two different positions.

[0061] Continue reading Figure 2 As shown, in one embodiment, the power output portion 2100 can be configured as a clearance groove opened in the pusher 2000, and the power receiving portion 1100 includes a main receiving section 1110 and a limiting bending section 1120 located at both ends of the main receiving section 1110. In this case, the main receiving section 1110 of the power receiving portion 1100 can be inserted into the clearance groove, and the two limiting bending sections 1120 are limitedly engaged with the pusher 2000 on both sides of the clearance groove, thereby forming a snap-fit ​​engagement with the clearance groove. At the same time, the power receiving portion 1100 can also include a compression spring member 1130, the fixed end of the compression spring member 1130 is connected to the lower end of the dynamic spring assembly 1000, and the movable end of the compression spring member 1130 is inserted into the clearance groove.

[0062] The power output portion 2100 of the pusher 2000 and the power receiving portion 1100 of the dynamic spring assembly 1000 can have two different first operating positions due to changes in contact point conversion. In one embodiment, a first protrusion 2110 is provided in the clearance groove, and the main receiving section 1110 of the power receiving portion 1100 abuts against the first protrusion 2110. Therefore, when the relay is in the contact-open state, the main receiving section 1110 can contact the first protrusion 2110, and the operating position between the main receiving section 1110 and the first protrusion 2110 is one of the first operating positions. Simultaneously, a second protrusion 2120 is provided in the clearance groove, and the compression spring member 1130 abuts against the second protrusion 2120. Therefore, when the relay is in the contact-closed state, the compression spring member 1130 contacts the second protrusion 2120, and the operating position between the compression spring member 1130 and the second protrusion 2120 is another of the first operating positions.

[0063] Among them, the compression spring member 1130 can also be provided with a stress release portion 1131, which is mainly used to release the stress of the compression spring member 1130. For example, the stress release portion 1131 adopts a curved structure arranged at an appropriate position of the compression spring member 1130. The curved structure can be a curve of various shapes, and the stress release portion 1131 can be arranged at a position close to the connection between the compression spring member 1130 and the dynamic spring assembly 1000, mainly used to release the stress at the connection bend between the compression spring member 1130 and the dynamic spring assembly 1000, thereby improving fatigue resistance and reliability.

[0064] The transmission member 3000 is provided with a transmission output portion 3200, and the pusher 2000 is provided with a limiting track 2200. The transmission output portion 3200 is slidably assembled along the limiting track 2200, thereby achieving a movable connection between the transmission member 3000 and the pusher 2000. In one embodiment, the limiting track 2200 can be configured as an elongated hole defined in the pusher 2000, and the transmission output portion 3200 can be configured as a sliding protrusion provided on the transmission member 3000. The sliding protrusion is slidably assembled in the elongated hole, such as a waist hole or a rectangular hole. In this case, the sliding engagement of the sliding protrusion with the elongated hole prevents the two from dislodging from each other, thereby improving the stability of the movement.

[0065] The sliding protrusion is in contact with the elongated hole at two action positions, one of which is configured as the second action position. Figure 3 As shown, when the relay is in the contact-closed state, the sliding protrusion pushes upward against the upper wall of the elongated hole. Therefore, the current second active position is where the top of the sliding protrusion contacts the upper wall of the elongated hole. Conversely, when the relay is in the contact-open state, the second active position is where the bottom of the sliding protrusion contacts the lower wall of the elongated hole.

[0066] In addition, the movable connection between the transmission member 3000 and the pushing member 2000 can also be connected in various ways such as hinge, shaft connection, etc., and those skilled in the art can set it according to actual needs, which is not limited here.

[0067] Meanwhile, the transmission member 3000 is provided with a transmission input portion 3300, which is configured to receive a driving force from the driving source 4000. The driving source 4000 can be provided in a variety of ways, as long as the transmission member rotates about the rotating shaft portion 3100 and reciprocates on the limiting track 2200. For example, in one embodiment, the driving source 4000 can include a driving gear, and the transmission input portion 3300 is configured as a sector-shaped transmission tooth. The driving gear engages with the sector-shaped transmission tooth, thereby driving the driving gear based on the tooth meshing method. The driving gear can be driven by a motor, etc.

[0068] Therefore, in the process of gradually forming the self-locking state, the fan-shaped transmission teeth can rotate to the extreme angle, so that the force in the direction of the pusher 2000 can no longer be transmitted. At this time, the transmission member 3000 presses against the pusher 2000 and is in a dead point structural state, unable to escape from the dead point structural state, thereby realizing the self-locking function.

[0069] Continue reading Figure 10 and Figure 11 As shown, the driving source 4000 may not use a driving gear, but may directly use a motor connected to the transmission input part 3300, and the rotation of the motor directly controls the rotation of the transmission member 3000. Those skilled in the art may select an appropriate method according to actual needs, and this is not limited here.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A self-locking structure, characterized in that: The self-locking structure comprises: Dynamic spring assembly (1000); A pushing member (2000), the pushing member (2000) being movably connected to the dynamic spring assembly (1000); A transmission member (3000), the transmission member (3000) being provided with a rotating shaft portion (3100), the transmission member (3000) being axially rotated based on the rotating shaft portion (3100), and the transmission member (3000) being movably connected to the pushing member (2000); The pushing member (2000) and the dynamic spring assembly (1000) have a first action position, the transmission member (3000) and the pushing member (2000) have a second action position, and the connecting line between the first action position, the second action position and the rotating shaft center portion (3100) can tend to a straight line or be a straight line when the contacts are closed.

2. The self-locking structure according to claim 1, characterized in that: The dynamic spring assembly (1000) is provided with a power receiving portion (1100), the pushing member (2000) is provided with a power output portion (2100), the pushing member (2000) is engaged with the power receiving portion (1100) of the dynamic spring assembly (1000) via the power output portion (2100), and the first action position is formed between the power output portion (2100) and the power receiving portion (1100); and / or, The transmission member (3000) is provided with a transmission output portion (3200), the pushing member (2000) is provided with a limiting track (2200), and the transmission output portion (3200) is slidably assembled along the limiting track (2200); and / or, The transmission member (3000) is provided with a transmission input portion (3300), and the transmission input portion (3300) is configured to receive a driving force from a driving source (4000).

3. The self-locking structure according to claim 2, characterized in that: When the contacts are closed or opened, the power output part (2100) and the power receiving part (1100) respectively have two different first action positions.

4. The self-locking structure according to claim 3, characterized in that: The power output portion (2100) is configured as a clearance groove opened in the pushing member (2000), and the power receiving portion (1100) includes a main body receiving section (1110) and limiting bending sections (1120) located at both ends of the main body receiving section (1110). The main body receiving section (1110) of the power receiving portion (1100) is inserted into the clearance groove, and the two limiting bending sections (1120) are configured to cooperate with the pushing member (2000) in a limiting manner.

5. The self-locking structure according to claim 4, characterized in that: The power receiving part (1100) further includes: A compression spring member (1130), wherein the fixed end of the compression spring member (1130) is connected to the lower end of the dynamic spring assembly (1000), the movable end of the compression spring member (1130) is inserted into the clearance groove, and the compression spring member (1130) is provided with a stress release portion (1131).

6. The self-locking structure according to claim 5, characterized in that: A first convex bud (2110) is provided in the recess, and the main receiving section (1110) of the power receiving part (1100) is in abutment contact with the first convex bud (2110); when the contact is disconnected, the action position between the main receiving section (1110) and the first convex bud (2110) is one of the first action positions; and / or, A second convex bulge (2120) is provided in the recess, and the compression spring member (1130) is in abutment contact with the second convex bulge (2120); when the contact is closed, the action position between the compression spring member (1130) and the second convex bulge (2120) is one of the first action positions.

7. The self-locking structure according to claim 2, characterized in that: The driving source (4000) includes a driving gear, the transmission input portion (3300) is configured as a sector-shaped transmission tooth, and the driving gear is drivingly engaged with the sector-shaped transmission tooth.

8. The self-locking structure according to claim 2, characterized in that: The limiting track (2200) is configured as an elongated hole opened in the pushing member (2000), and the transmission output part (3200) is configured as a sliding convex shaft provided on the transmission member (3000), and the sliding convex shaft is slidably assembled in the elongated hole.

9. The self-locking structure according to claim 8, characterized in that: The sliding protruding shaft is in contact with the elongated hole via two action positions, and one of the two action positions is configured as the second action position.

10. A relay, characterized in that: The relay includes the self-locking structure according to any one of claims 1 to 9.

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