A lever relay
By using the mechanical transmission structure and dual-winding coil design of the lever-type relay, the problems of complex structure and slow response speed of traditional relays are solved, achieving fast response, safety, reliability and energy saving circuit control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GUANGSHA COLLEGE OF APPLIED CONSTRTECH
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional relays have complex structures, are difficult to manufacture, have high costs, slow response speeds, and pose a risk of arcing due to friction.
It adopts a lever-type structure, using an electromagnetic push rod to drive the swing block and contact lever to achieve mechanical transmission. Combined with torsion springs and double-winding coils, it simplifies the internal structure and improves response speed and safety.
It achieves rapid response to changes in circuit signals, reduces manufacturing difficulty and cost, avoids friction arcing, and is energy-efficient.
Smart Images
Figure CN224458041U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of relay technology, and specifically relates to a lever-type relay. Background Technology
[0002] In modern electronic circuits, relays, as an important electronic component, are widely used in many fields such as automatic control, communication, and power, playing a crucial role in automatic adjustment, safety protection, and circuit switching. Traditional relays vary in structure, but in practical use, they all have some problems to varying degrees.
[0003] For example, the dual-contact magnetic latching relay disclosed in Chinese utility model patent CN214588647U, while possessing certain innovations and employing a dual-contact design, can meet diverse circuit connection requirements in some application scenarios.
[0004] However, these relays still have some shortcomings. For example, their internal operating mechanism is relatively complex, utilizing components such as permanent magnets and push rods to form a complex magnetic attraction structure and mechanical linkage components. This complex structure not only increases the difficulty and cost of relay manufacturing, hindering the production and sales of relay products, but also leaves room for improvement in terms of rapid response. Utility Model Content
[0005] The purpose of this invention is to provide a lever-type relay to solve the problems mentioned in the background section. The lever-type relay provided by this invention has the characteristics of simple structure and fast response speed.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a lever-type relay, comprising a housing, an electromagnetic push rod installed at the upper end inside the housing, a swing block provided below the actuating end of the electromagnetic push rod, the swing block being rotatably connected to the housing, the upper end of the swing block being connected to the actuating end of the electromagnetic push rod, a contact lever provided below the electromagnetic push rod, the contact lever being rotatably connected to the housing, and an elastic element installed on the contact lever, a first contact piece installed on one side of the lower end inside the housing, a second contact piece installed on the other side of the lower end inside the housing, the second contact piece being electrically connected to the contact lever via a wire, one end of the contact lever corresponding to the first contact piece, and the other end of the contact lever corresponding to the lower end of the swing block.
[0007] To achieve the connection between the first housing and the second housing, the outer shell further includes a first housing and a second housing, wherein the four surfaces of the first housing are provided with buckles, and the second housing is provided with buckle grooves corresponding to the buckles.
[0008] In order to enable the contact lever to rotate and contact the first contact piece when the oscillating block loses its force, and at the same time, to press the contact lever tightly on the first contact piece to ensure good contact, the elastic element is a torsion spring, with one end of the torsion spring fixed to the outer shell and the other end of the torsion spring fixed to the contact lever.
[0009] In order to conduct electricity through contact with the first contact piece, a contact portion is further provided on the end of the contact lever that contacts the first contact piece.
[0010] To achieve the back-and-forth movement of the push rod, the electromagnetic push rod further includes a bracket with a coil wound around its circumference. One end of the bracket is connected to a stationary iron core, and a moving iron core slides inside the bracket. One end of the push rod is connected to the moving iron core, and a spring is provided between the moving iron core and the stationary iron core.
[0011] To achieve the connection between the swing block and the push rod, the other end of the push rod is further provided with two spaced limiting rings, and the upper end of the swing block is provided with a slot.
[0012] To further improve the response speed and reliability of the relay, an arc-shaped groove is provided above one end of the contact lever corresponding to the swing block.
[0013] To prevent sparking caused by friction between the oscillating block and the contact lever, and to improve safety, the oscillating block is made of a non-conductive material.
[0014] To achieve faster response and lower energy consumption, the coil is further designed with a dual-winding structure, including a high-voltage winding and a low-voltage winding.
[0015] Furthermore, in this utility model, the method for implementing a lever-type relay includes the following steps:
[0016] (i) When the coil is energized, it generates an induced magnetic field. Under the action of magnetic attraction, the moving iron core drives the push rod to move to the left and compresses the spring.
[0017] (ii) The push rod drives the swing block to rotate counterclockwise, causing the lower end of the swing block to separate from the contact lever;
[0018] (III) Under the action of the torsion spring's restoring force, the contact lever rotates clockwise until the contact part abuts against the first contact piece, thus closing the circuit;
[0019] (iv) When the coil is de-energized, the induced magnetic field disappears, and the moving iron core drives the push rod to move to the right under the action of the spring restoring force;
[0020] (v) The push rod drives the swing block to rotate clockwise, and the lower end of the swing block pushes the contact lever to rotate counterclockwise, so that the contact part separates from the first contact piece and the circuit is disconnected.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] 1. This utility model utilizes the extension of an electromagnetic push rod to drive a swing block to rotate counterclockwise, causing the lower end of the swing block to separate from the contact lever. Under the restoring force of the torsion spring, the contact lever rotates clockwise and contacts the first contact piece, thus closing the circuit. The retraction of the electromagnetic push rod causes the swing block to rotate clockwise, causing the lower end of the swing block to push the contact lever to rotate counterclockwise, separating the contact lever from the first contact piece and opening the circuit. Through a mechanical transmission structure based on the lever principle, the circuit on / off control is achieved, enabling the relay to quickly respond to changes in the input signal. Simultaneously, the internal structure is simplified, reducing manufacturing difficulty and cost.
[0023] 2. This utility model uses a torsion spring to act on the contact lever, so that the contact lever can rotate and contact the first contact piece when the swing block loses its force. At the same time, it can also press the contact lever tightly on the first contact piece to ensure good contact.
[0024] 3. This utility model achieves the connection between the swing block and the push rod by using the slot and the groove between the two limiting rings, which not only improves the accuracy and reliability of the transmission, but also realizes an effective and easy-to-assemble transmission connection method.
[0025] 4. The swing block of this utility model is made of non-conductive material, which avoids sparking caused by friction between the swing block and the contact lever, thus improving safety in use.
[0026] 5. The contact lever of this utility model has an arc-shaped groove above one end of the swing block. The arc-shaped groove cooperates with the end of the swing block, so that the swing block and the contact lever cooperate more smoothly when the relay switches states, thereby improving the response speed and reliability of the relay.
[0027] 6. The coil of this utility model has a dual-winding structure, which achieves faster response speed and lower energy consumption. It is especially suitable for applications that require frequent switching operations, thus meeting both performance requirements and energy-saving goals. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the internal structure of this utility model.
[0029] Figure 2 This is a schematic diagram of the internal structure of this utility model.
[0030] Figure 3 This is a schematic diagram of the structure of this utility model.
[0031] Figure 4 This is a schematic diagram of the electromagnetic actuator of this utility model.
[0032] Figure 5 This is a schematic diagram of the structure of the swing block of this utility model.
[0033] Figure 6 This is a schematic diagram of the contact lever of this utility model.
[0034] Figure 7 This is a schematic diagram of the push rod of this utility model.
[0035] In the diagram: 1. First contact piece; 2. Torsion spring; 3. Contact lever; 31. Arc groove; 32. Contact part; 4. Second contact piece; 5. Swing block; 51. Slot; 6. Outer shell; 61. First shell; 62. Second shell; 63. Buckle; 64. Buckle groove; 7. Electromagnetic push rod; 71. Bracket; 72. Stationary iron core; 73. Push rod; 74. Spring; 75. Moving iron core; 76. Coil; 77. Limiting ring. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] Example 1
[0038] Please see Figures 1-7 This utility model provides the following technical solution: a lever-type relay, including a housing 6, an electromagnetic push rod 7 installed at the upper end inside the housing 6, a swing block 5 provided below the actuating end of the electromagnetic push rod 7, the swing block 5 being rotatably connected to the housing 6, the lever arm from the connection end of the swing block 5 and the actuating end of the electromagnetic push rod 7 to the fulcrum being greater than the lever arm from the contact end of the swing block 5 and the contact lever 3 to the fulcrum, the upper end of the swing block 5 being connected to the actuating end of the electromagnetic push rod 7, and a contact lever 3 being provided below the electromagnetic push rod 7, the contact lever 3 being made of copper. The contact lever 3 is rotatably connected to the outer shell 6. The lever arm from the contact end of the contact lever 3 to the fulcrum of the swing block 5 is greater than the lever arm from the contact end of the contact lever 3 to the fulcrum of the first contact piece 1. An elastic element is also installed on the contact lever 3. The first contact piece 1 is installed on one side of the lower end of the inner shell 6, and the second contact piece 4 is installed on the other side of the lower end of the inner shell 6. The second contact piece 4 is electrically connected to the contact lever 3 through a wire. One end of the contact lever 3 corresponds to the first contact piece 1, and the other end of the contact lever 3 corresponds to the lower end of the swing block 5.
[0039] By adopting the above technical solution, this utility model uses the extension of the push rod 73 of the electromagnetic push rod 7 to drive the swing block 5 to rotate counterclockwise, causing the lower end of the swing block 5 to separate from the contact lever 3. Under the action of the restoring force of the torsion spring 2, the contact lever 3 rotates clockwise and comes into contact with the first contact piece 1, thus closing the circuit. By retracting the push rod 73 of the electromagnetic push rod 7, the swing block 5 rotates clockwise, causing the lower end of the swing block 5 to push the contact lever 3 to rotate counterclockwise, causing the contact lever 3 to separate from the first contact piece 1, thus opening the circuit. Through the mechanical transmission structure based on the lever principle, the control of the circuit opening and closing is realized, enabling the relay to respond quickly to changes in the input signal. At the same time, the internal structure is simplified, and the manufacturing process difficulty and cost are reduced.
[0040] Specifically, the outer shell 6 includes a first shell 61 and a second shell 62, wherein the first shell 61 is provided with buckles 63 on its four surfaces, and the second shell 62 is provided with buckle grooves 64 corresponding to the buckles 63.
[0041] By adopting the above technical solution, the first housing 61 and the second housing 62 are connected by the engagement of the buckle 63 and the groove 64.
[0042] Specifically, the elastic element is a torsion spring 2, one end of which is fixed to the outer casing 6, and the other end of which is fixed to the contact lever 3.
[0043] By adopting the above technical solution, the torsion spring 2 acts on the contact lever 3, so that the contact lever 3 can rotate and contact the first contact piece 1 when the force of the swing block 5 is lost. At the same time, the contact lever 3 can be pressed tightly on the first contact piece 1 to ensure good contact.
[0044] Specifically, the contact lever 3 has a contact portion 32 on the end that contacts the first contact piece 1.
[0045] The above technical solution is used to make contact with the first contact piece 1 for conduction.
[0046] Specifically, the electromagnetic push rod 7 includes a bracket 71, a coil 76 is wound around the circumference of the bracket 71, a stationary iron core 72 is connected to one end of the bracket 71, and a moving iron core 75 slides inside the bracket 71. One end of the push rod 73 is connected to the moving iron core 75, and a spring 74 is provided between the moving iron core 75 and the stationary iron core 72.
[0047] By adopting the above technical solution, the energized coil 76 generates an induced magnetic field, which causes the moving iron core 75 and the stationary iron core 72 to attract each other, driving the push rod 73 to push out. When the coil 76 is de-energized, the restoring force of the spring 74 drives the moving iron core 75 to reset, driving the push rod 73 to retract.
[0048] Specifically, the other end of the push rod 73 is provided with two spaced-apart limit rings 77, and the upper end of the swing block 5 is provided with a slot 51.
[0049] By adopting the above technical solution, the connection between the swing block 5 and the push rod 73 is realized through the groove cooperation between the slot 51 and the two limit rings 77, which not only improves the accuracy and reliability of the transmission, but also realizes an effective and easy-to-assemble transmission connection method.
[0050] Example 2
[0051] The difference between this embodiment and embodiment 1 is that, specifically, the swing block 5 is made of a non-conductive material, preferably a rigid plastic material.
[0052] By adopting the above technical solution, sparking caused by friction between the swing block 5 and the contact lever 3 is avoided, thus improving safety in use.
[0053] Example 3
[0054] The difference between this embodiment and embodiment 1 is that, specifically, an arc-shaped groove 31 is provided above one end of the swing block 5 corresponding to the contact lever 3.
[0055] By adopting the above technical solution, the arc groove 31 cooperates with the end of the swing block 5, making the cooperation between the swing block 5 and the contact lever 3 smoother when the relay switches states, thereby improving the response speed and reliability of the relay.
[0056] Example 4
[0057] The difference between this embodiment and embodiment 1 is that, specifically, the coil 76 has a dual-winding structure, including a high-voltage winding and a low-voltage winding. During the relay energizing stage, the high-voltage winding is energized to generate a strong magnetic field, causing the push rod 73 to extend quickly to complete the contact closure. After the contact is closed, the circuit switches to the low-voltage winding to maintain the position of the push rod 73 with lower power.
[0058] By adopting the above technical solution, coil 76 has a dual-winding structure, which achieves faster response speed and lower energy consumption. It is particularly suitable for applications that require frequent switching operations, thus meeting both performance requirements and energy-saving goals.
[0059] Example 5
[0060] Furthermore, the implementation method of the lever-type relay described in this utility model includes the following steps:
[0061] (i) When the coil 76 is energized, it generates an induced magnetic field. Under the action of magnetic attraction, the moving iron core 75 drives the push rod 73 to move to the left and compresses the spring 74.
[0062] (ii) Push rod 73 drives the swing block 5 to rotate counterclockwise, causing the lower end of the swing block 5 to separate from the contact lever 3;
[0063] (III) Under the action of the restoring force of the torsion spring 2, the contact lever 3 rotates clockwise until the contact part 32 abuts against the first contact piece 1, thereby closing the circuit;
[0064] (iv) When the coil 76 is de-energized, the induced magnetic field disappears, and the moving iron core 75 drives the push rod 73 to move to the right under the restoring force of the spring 74.
[0065] (V) The push rod 73 drives the swing block 5 to rotate clockwise. The lower end of the swing block 5 pushes the contact lever 3 to rotate counterclockwise, so that the contact part 32 separates from the first contact piece 1, thereby breaking the circuit. During the counterclockwise rotation of the contact lever 3, the torsion spring 2 is subjected to force and twists to store energy.
[0066] In summary, this invention utilizes the extension of the push rod 73 of the electromagnetic push rod 7 to drive the swing block 5 to rotate counterclockwise, causing the lower end of the swing block 5 to separate from the contact lever 3. Under the restoring force of the torsion spring 2, the contact lever 3 rotates clockwise and comes into contact with the first contact piece 1, thus closing the circuit. Conversely, the retraction of the push rod 73 of the electromagnetic push rod 7 causes the swing block 5 to rotate clockwise, pushing the contact lever 3 counterclockwise, thus separating the contact lever 3 from the first contact piece 1 and opening the circuit. Through a mechanical transmission structure based on the lever principle, this invention achieves control over the circuit's on / off state, enabling the relay to respond quickly to changes in the input signal. It also simplifies the internal structure and reduces manufacturing difficulty and cost. Furthermore, the torsion spring 2 acts on the contact lever 3, allowing it to rotate and contact the first contact piece 1 when the force of the swing block 5 is removed. Simultaneously, it also ensures that the contact lever 3 is firmly pressed against the first contact piece 1, guaranteeing good contact. This invention achieves the connection between the swing block 5 and the push rod 73 through the groove cooperation between the slot 51 and the two limiting rings 77, which improves the accuracy and reliability of transmission and realizes an effective and easy-to-assemble transmission connection method. The swing block 5 is made of non-conductive material to avoid sparking caused by friction between the swing block 5 and the contact lever 3, thus improving safety. The contact lever 3 has an arc-shaped groove 31 above one end corresponding to the swing block 5. The arc-shaped groove 31 cooperates with the end of the swing block 5, making the cooperation between the swing block 5 and the contact lever 3 smoother when the relay switches states, improving the relay's response speed and reliability. The coil 76 has a double-winding structure, achieving faster response speed and lower energy consumption, making it particularly suitable for applications requiring frequent switching operations, meeting performance requirements while achieving energy saving.
[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A lever-type relay comprising a housing, characterized by: An electromagnetic push rod is installed at the upper end inside the outer casing. A swing block is located below the actuating end of the electromagnetic push rod. The swing block is rotatably connected to the outer casing. The upper end of the swing block is connected to the actuating end of the electromagnetic push rod. A contact lever is located below the electromagnetic push rod. The contact lever is rotatably connected to the outer casing, and an elastic element is also installed on the contact lever. A first contact piece is installed on one side of the lower end inside the outer casing, and a second contact piece is installed on the other side of the lower end inside the outer casing. The second contact piece is electrically connected to the contact lever through a wire. One end of the contact lever corresponds to the first contact piece, and the other end of the contact lever corresponds to the lower end of the swing block.
2. A lever relay according to claim 1, characterized in that: The outer casing includes a first casing and a second casing, wherein the first casing has buckles on its four surfaces and the second casing has buckle grooves corresponding to the buckles.
3. A lever-type relay according to claim 1, characterized in that: The elastic element is a torsion spring, with one end of the torsion spring fixed to the outer shell and the other end fixed to the contact lever.
4. A lever-type relay according to claim 1, characterized in that: The contact lever has a contact portion at the end that contacts the first contact piece.
5. A lever-type relay according to claim 1, characterized in that: The electromagnetic push rod includes a bracket with a coil wound around its circumference. One end of the bracket is connected to a stationary iron core, and a moving iron core slides inside the bracket. One end of the push rod is connected to the moving iron core, and a spring is provided between the moving iron core and the stationary iron core.
6. A lever relay according to claim 5, characterized in that: The other end of the push rod is provided with two spaced-apart limit rings, and the upper end of the swing block is provided with a slot.
7. A lever-type relay according to claim 1, characterized in that: An arc-shaped groove is provided above one end of the contact lever corresponding to the swing block.
8. A lever-type relay according to claim 1, characterized in that: The oscillating block is made of a non-conductive material.
9. A lever-type relay according to claim 1, characterized in that: The coil has a dual-winding structure, including a high-voltage winding and a low-voltage winding.