Relay with test button

Abstract

The utility model discloses a relay with a test button, which comprises a button assembly and a housing, the housing is provided with an installation groove for installing the button assembly, a coil, a driving arm, a movable contact and a fixed contact are arranged in the housing, the driving arm is connected and matched with the movable contact, and the fixed contact is connected and matched with the movable contact. The button assembly comprises a button head arranged in the mounting groove in a back-and-forth sliding fit mode, a driving head penetrating into the housing is arranged at the bottom of the button head, a driving block capable of being in up-and-down sliding fit mode is arranged between the button head and the driving arm, one end of the driving block is located above the driving arm, and the other end of the driving block is located on one side of the driving head. An inclined edge is arranged on the side, close to the driving head, of the driving head, and when the button head drives the driving head to slide towards the driving block, the driving arm can drive the movable contact to be electrically connected towards the fixed contact to achieve testing. The button assembly of the relay is simple and practical in structure, good in stability and worthy of vigorous popularization.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, and more specifically, it relates to a relay with a test button. Background Technology

[0002] A relay is an automatic switching device that controls the opening and closing of a circuit based on external input signals (electrical quantities, such as voltage and current; non-electrical quantities, such as time, speed, and heat). Its contacts are usually connected in the control circuit. Most existing relays fall into two categories: one only has a manual instantaneous test function, but this design lacks anti-accidental activation features, making it prone to malfunction and affecting normal operation. The other type has both a manual instantaneous test function and anti-accidental activation features, but the test button with anti-accidental activation features in this design has a more complex structure, making operation complicated and prone to failure in the protected state, thus reducing structural stability. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a relay with a test button.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a relay with a test button, comprising a button assembly and a housing. The housing has a mounting groove for mounting the button assembly. A coil, a drive arm, a movable contact, and a fixed contact are disposed within the housing. The drive arm is connected to the movable contact. The button assembly includes a button head that slides back and forth within the mounting groove. A drive head extending into the housing is located at the bottom of the button head. A drive block that slides vertically between the button head and the drive arm is provided. One end of the drive block is located above the drive arm, and the other end is located to one side of the drive head. An inclined edge is provided on the side of the drive head closest to the drive arm. When the button head drives the drive head to slide towards the drive block, the drive block is pressed downwards by the inclined edge and pushes against the drive arm. At this time, the drive arm drives the movable contact towards the fixed contact to make an electrical connection and achieve the test.

[0005] The present invention is further configured such that: a limiting plate is provided inside the cover between the drive arm and the drive head, and the limiting plate is provided with a sliding groove that slides up and down with the drive block.

[0006] The present invention is further configured such that: the driving arm is L-shaped, the center end of the driving arm is elastically connected to one corner of the coil, one end of the driving arm extends above the coil at an angle, and the other end extends to one side of the movable contact, and a connecting plate fixedly connected to the driving arm is provided on one side of the movable contact.

[0007] The present invention is further configured such that: a support plate fixed to the bottom of the cover is provided at the bottom of the connecting plate.

[0008] The present invention is further configured such that: the button head is provided with locking blocks on both sides of the drive head, and the mounting groove is provided with a locking groove that slides back and forth with the locking blocks.

[0009] The present invention is further configured such that: a limiting block is provided at the bottom of the button head, and two limiting grooves are provided at the bottom of the limiting block with a gap, and a positioning block is provided at the bottom of the mounting groove to engage with the limiting groove.

[0010] The present invention is further configured such that: the cover is provided with limiting protrusions located on both sides of the drive block.

[0011] By adopting the above technical solution, the button assembly of this practical relay has a simple and practical structure, good stability, and is worthy of widespread promotion. Attached Figure Description

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 A schematic diagram of the structure without the casing;

[0014] Figure 3 This is an exploded view of the structure of this utility model;

[0015] Figure 4 This is a cross-sectional view of the button header.

[0016] 1. Button assembly; 10. Button head; 11. Drive head; 12. Inclined edge; 13. Locking block; 14. Limiting block; 15. Limiting groove; 2. Cover; 20. Mounting groove; 200. Locking groove; 201. Positioning block; 21. Coil; 22. Limiting protrusion; 3. Drive arm; 4. Movable contact; 5. Fixed contact; 6. Drive block; 7. Limiting plate; 70. Sliding groove; 8. Connecting plate; 80. Support plate. Detailed Implementation

[0017] Reference Figures 1 to 4 The embodiments of this utility model will be further described below.

[0018] This utility model discloses a relay with a test button, including a button assembly 1 and a housing 2. The housing 2 has a mounting groove 20 for mounting the button assembly 1. A coil 21, a drive arm 3, a movable contact 4, and a fixed contact 5 are disposed inside the housing 2. The drive arm 3 is connected to the movable contact 4. The button assembly 1 includes a button head 10 that slides back and forth within the mounting groove 20. A drive head 11 extending into the housing 2 is disposed at the bottom of the button head 10. The button head 10 and... A drive block 6 that can slide up and down is provided between the drive arms 3. One end of the drive block 6 is located above the drive arm 3, and the other end is located on one side of the drive head 11. An inclined edge 12 is provided on the side of the drive head 11 close to the drive head 11. When the button head 10 drives the drive head 11 to slide toward the drive block 6, the drive block 6 will be squeezed and slid down by the inclined edge 12 and press against the drive arm 3 downward. At this time, the drive arm 3 will drive the movable contact 4 toward the fixed contact 5 to make an electrical connection to realize the test.

[0019] Furthermore, a limiting plate 7 is provided inside the housing 2, located between the drive arm 3 and the drive head 11. The limiting plate 7 is provided with a sliding groove 70 that slides vertically with the drive block 6. By providing the limiting plate 7, the drive block 6 can slide stably up and down along the limiting plate 7, thereby achieving stable pressing of the drive arm 3.

[0020] Furthermore, the drive arm 3 is L-shaped, with its central end elastically connected to one corner of the coil 21. One end of the drive arm 3 extends above the coil 21 at an angle, and the other end extends to one side of the movable contact 4. A connecting plate 8 is provided on one side of the movable contact 4 and is fixedly connected to the drive arm 3.

[0021] Furthermore, the bottom of the connecting plate 8 is provided with a support plate 80 fixed to the bottom of the cover 2.

[0022] Furthermore, the button head 10 is provided with locking blocks 13 on both sides relative to the drive head 11, and the mounting groove 20 is provided with a slot 200 that slides back and forth with the locking blocks 13. By providing locking blocks 13 on both sides of the button head 10 and providing slots 200 in the mounting groove 20 that slide back and forth with the locking blocks 13, the button head 10 is made more stable during sliding.

[0023] Furthermore, a limiting block 14 is provided at the bottom of the button head 10, and two limiting grooves 15 are provided at the bottom of the limiting block 14 with a gap. A positioning block 201 is provided at the bottom of the mounting groove 20 to engage with the limiting grooves 15. By providing a positioning block 201 at the bottom of the mounting groove 20 to engage with the limiting grooves 15, the button head 10 achieves a positioning effect when closing and opening, making it less prone to sliding under external force and preventing accidental activation.

[0024] Furthermore, the housing 2 is also provided with limiting protrusions 22 located on both sides of the drive block 6. By providing the limiting protrusions 22, the drive block 6 can be stably slid up and down to achieve driving.

[0025] Working principle: When a relay needs to be tested, the button head 10 is pushed, causing it to slide along the mounting groove 20. As the button head 10 slides, the drive block 6, located between the button head 10 and the drive arm 3, is pressed by the inclined edge 12 of the drive head 11, thus sliding downwards under pressure. When the drive block 6 is pressed, it pushes against the drive arm 3 and presses it downwards. Figure 2 As shown, when the drive arm 3 is subjected to a downward compressive force, the drive arm 3 will drive the connecting plate 8 and the movable contact 4 to make contact with the fixed contact 5, thereby achieving electrical connection and realizing the test.

[0026] The push button assembly 1 of this practical relay has a simple and practical structure, good stability, and is worth promoting.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A relay with a test button, characterized in that: The device includes a button assembly and a housing. The housing has a mounting slot for mounting the button assembly. Inside the housing are a coil, a drive arm, a movable contact, and a fixed contact. The drive arm is connected to the movable contact. The button assembly includes a button head that slides back and forth within the mounting slot. The bottom of the button head has a drive head that extends into the housing. A drive block that slides up and down between the button head and the drive arm is provided. One end of the drive block is located above the drive arm, and the other end is located to one side of the drive head. An inclined edge is provided on the side of the drive head closest to the drive arm. When the button head drives the drive head to slide toward the drive block, the drive block is squeezed downward by the inclined edge and slides down against the drive arm, causing the drive arm to move the movable contact toward the fixed contact for electrical connection and testing.

2. A relay with a test button according to claim 1, characterized in that: The housing contains a limiting plate located between the drive arm and the drive head, and the limiting plate has a sliding groove that slides vertically with the drive block.

3. A relay with a test button according to claim 1, characterized in that: The drive arm is L-shaped, with its central end elastically connected to one corner of the coil. One end of the drive arm extends above the coil at an angle, and the other end extends to one side of the movable contact. A connecting plate fixedly connected to the drive arm is provided on one side of the movable contact.

4. A relay with a test button according to claim 3, characterized in that: The bottom of the connecting plate is provided with a support plate fixed to the bottom of the cover.

5. A relay with a test button according to claim 1, characterized in that: The button head has locking blocks on both sides relative to the drive head, and the mounting groove has a slot that slides back and forth with the locking blocks.

6. A relay with a test button according to claim 5, characterized in that: The bottom of the button head is also provided with a limiting block, and the bottom of the limiting block is provided with two limiting grooves that are spaced apart. The bottom of the mounting groove is provided with a positioning block that engages with the limiting grooves.

7. A relay with a test button according to claim 1, characterized in that: The housing is also equipped with limiting protrusions located on both sides of the drive block.

Images