An over / under voltage protector

Abstract

This invention relates to the field of electrical technology, specifically to an over / under voltage protector, comprising a slot disposed on a side wall along the length of a first housing; a connecting rod disposed on a second housing, with a fixing structure on the connecting rod adapted to the slot, the fixing structure being inserted into the slot; and an anti-sway structure disposed on the first housing, positioned close to the slot. This invention provides an over / under voltage protector with a smaller width and volume.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more specifically to an over / under voltage protector. Background Technology

[0002] Over / under voltage protectors are devices that automatically disconnect when overvoltage or undervoltage in a circuit exceeds specified values, and automatically detect the circuit voltage, automatically closing when the voltage returns to normal. They are mainly used in household and commercial power distribution (single-phase AC230V, three-phase 400V) circuits for overvoltage, undervoltage, phase loss, and neutral wire breakage protection.

[0003] Existing over / under voltage protectors are typically 36mm wide. These protectors generally use a splicing structure of left and right halves of the housing, or a snap-fit ​​structure with hooks and slots for the upper and lower halves of the housing. The snap-fit ​​points of these protectors are located in the width direction of the product, near the terminals.

[0004] As protective electrical appliances are developing towards greater precision and miniaturization, how to further reduce the width of over- and under-voltage protectors has become an urgent problem to be solved.

[0005] Currently, most over / under voltage protectors with a diameter of 30mm or less on the market use a left and right halves of the housing for fixation, making it impossible to use the traditional snap-fit ​​structure. The inventors discovered that using the traditional snap-fit ​​structure resulted in insufficient design space, requiring changes to the snap-fit ​​structure's position. However, changing the snap-fit ​​position caused the product to be extremely prone to cracking. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing over- and under-voltage protectors being wide and bulky, thereby providing an over- and under-voltage protector with a smaller width and smaller size.

[0007] To solve the above-mentioned technical problems, the present invention provides an over / under voltage protector, including a slot disposed on the side wall of a first housing along its length; a connecting rod disposed on a second housing, and a fixing structure adapted to the slot is provided on the connecting rod, the fixing structure being inserted into the slot; and further including an anti-sway structure disposed on the first housing and located close to the slot.

[0008] Optionally, the anti-sway structure is an anti-sway block that abuts against the connecting rod.

[0009] Optionally, the anti-sway block is provided with a guide surface to facilitate the insertion of the connecting rod.

[0010] Optionally, the connecting rods are four symmetrically arranged on the side wall of the second housing, and the anti-sway structure is located between at least two connecting rods on the same side wall.

[0011] Optionally, the anti-sway structure abuts against the adjacent surfaces of the two connecting rods on both sides.

[0012] Optionally, one side of the free end of the connecting rod protrudes outward to form the fixing structure.

[0013] Optionally, it may also include: a wiring space located at both ends of the first housing and the second housing; and a wiring assembly located within the wiring space, the wiring assembly including at least two pairs of terminals.

[0014] Optionally, it may also include: an insulating element disposed within the wiring space, the insulating element being located between each pair of the terminals.

[0015] Optionally, a limiting structure is also included, the limiting structure comprising: at least two limiting members respectively disposed on the first housing and the second housing, the two limiting members being staggered; and a limiting groove disposed on the first housing and the second housing, corresponding to the position of the limiting members, and adapted to allow the first housing to be inserted into the second housing, so as to limit the relative position of the first housing and the second housing.

[0016] Optionally, both the limiting member and the limiting groove are provided on the insulating member.

[0017] The technical solution of this invention has the following advantages:

[0018] 1. The over / under voltage protector provided by the present invention includes a slot disposed on the side wall of a first housing along its length; a connecting rod disposed on a second housing, and a fixing structure adapted to the slot is provided on the connecting rod, the fixing structure being inserted into the slot; and further includes an anti-sway structure disposed on the first housing and disposed close to the slot.

[0019] By providing a slot on the first housing, the second housing can be quickly installed and connected into a single unit. Simultaneously, by incorporating an anti-sway structure on the first housing, the fixing structure on the connecting rod connects more tightly with the slot when the first and second housings are joined, preventing wobbling after the connecting rod is inserted into the slot. This avoids instability in the connection between the first and second housings even after reducing the width of the housing body. Furthermore, it ensures that the connecting rod will not separate from the slot after the housing body width is reduced, preventing cracking of the first and second housings.

[0020] 2. The over / under voltage protector provided by the present invention has a guide surface on the anti-sway block to facilitate the insertion of the connecting rod. The setting of the guide surface plays a guiding role in the insertion of the connecting rod and avoids the connecting rod getting stuck during the insertion into the slot. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A perspective view of the over / under voltage protector provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the first shell structure;

[0024] Figure 3 This is a schematic diagram of the second shell structure;

[0025] Figure 4 A schematic diagram showing the arrangement of the relay and the N-pole connection plate.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Shell body; 11-First shell; 111-Slot; 12-Second shell; 121-Connecting rod; 122-Mounting structure; 13-Receiving cavity; 14-Receiving space; 2-Wiring assembly; 21-Wiring terminal; 22-Wiring socket; 3-Insulating component; 4-Limiting component; 5-Limiting groove; 6-Anti-sway structure; 7-Relay; 8-Circuit board; 9-N-pole connecting plate. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Please see Figures 1 to 4 As shown, this embodiment of the invention provides an over / under voltage protector, including: a slot 111 disposed on the side wall of the first housing 11 along its length; a connecting rod 121 disposed on the second housing 12, and a fixing structure 122 adapted to the slot 111 is provided on the connecting rod 121, the fixing structure 122 being inserted into the slot 111; and further including: an anti-sway structure 6 disposed on the first housing 11 and disposed close to the slot 11.

[0033] This over / under voltage protector utilizes a snap-fit ​​structure, allowing the first housing 11 and the second housing 12 to be quickly installed and connected as a single unit. The first housing 11 and the second housing 12 together form the housing body 1. Simultaneously, by providing an anti-sway structure 6 on the first housing 11, the fixing structure 122 on the connecting rod 121 connects more tightly with the slot 11 when the first housing 11 and the second housing 12 are connected as a single unit. This prevents wobbling after the connecting rod 121 is inserted into the slot 11, thus avoiding instability in the connection between the first housing 11 and the second housing 12 even after reducing the width of the housing body 1. It also ensures that the connecting rod 121 can separate from the slot 111 after the width of the housing body 1 is reduced, preventing cracking of the first housing 11 and the second housing 12.

[0034] The slots 111 can be set at multiple intervals around the circumference of the first housing 11. The number and position of the connecting rods 121 only need to correspond to the slots 111 and allow the mounting structure 122 to be inserted into the slots 111.

[0035] In this embodiment, there are four slots 111, which are evenly distributed in the middle of the first housing 11; there are also four connecting rods 121, which are evenly distributed in the middle of the second housing 12.

[0036] As an alternative implementation, the slot 111 can be disposed on the side wall of the second housing 12, and the connecting rod 121 can be disposed on the second housing 12. The specific arrangement can be set according to the actual situation.

[0037] The anti-sway structure 6 is an anti-sway block that abuts against the connecting rod 121. The anti-sway block is located on the plate that forms the wiring space 14 with the second housing 12. This prevents the connecting rod 121 from wobbling within the slot 111 after the first housing 11 and the second housing 12 are connected, thus ensuring the tightness and reliability of the connection between the first housing 11 and the second housing 12 and preventing cracking after the connection. Simultaneously, the anti-sway block has a guide surface to facilitate the insertion of the connecting rod 121; this guide surface guides the insertion of the connecting rod 121, preventing jamming during insertion into the slot 11.

[0038] As an alternative implementation, the connecting rods 121 are four symmetrically arranged on the side wall of the second housing 12, and the anti-sway structure 6 is located between at least two connecting rods 121 on the same side wall, thereby preventing the connecting rods 121 from swaying in the slot 111, and thus ensuring the tightness and reliability of the connection between the first housing 11 and the second housing 12.

[0039] Specifically, the anti-sway structure 6 abuts against the adjacent surfaces of the two connecting rods 121 on both sides. The anti-sway structure 6 can effectively prevent the buckling structure from disengaging or the connecting rods 121 from separating from the slots 111 due to the distance between the inner engagement points being too far, which could lead to cracking of the first housing 11 and the second housing 12.

[0040] Please continue reading. Figure 2 As shown, one side of the free end of the connecting rod 121 protrudes outward to form the fixing structure 122, that is, a barb formed on the free end of the connecting rod 121, so that when the first housing 11 and the second housing 12 are fastened together, the barb is used to tightly fasten the first housing 11 and the second housing 12, thereby quickly completing the installation of the first housing 11 and the second housing 12.

[0041] It also includes: a wiring space 14, located at both ends of the first housing 11 and the second housing 12; and a wiring assembly 2, located within the wiring space 14, the wiring assembly 2 including at least two pairs of terminals 21. The wiring assembly 2 is used to connect external wires, and typically, the terminals 21 within the wiring assembly 2 connect the live wire and the neutral wire. The terminals 21 are screws. The wiring assembly 2 also includes a terminal block 22, within which the terminals 21 are placed to connect the neutral wire and the live wire.

[0042] Furthermore, an insulating element 3 can be provided within the wiring space 14, and the insulating element 3 is located between each pair of terminals 21. Compared to the electrical clearance between the two terminals 21 in the prior art over / under voltage protector, by providing an insulating element 3 between each pair of terminals 21, i.e., two terminals 21, the electrical clearance between the two terminals 21 is increased, and the width of the housing body 1 is reduced. This effectively reduces the width of the housing body 1 in the prior art from 36mm to 27mm, thereby reducing the size of the over / under voltage protector, achieving product miniaturization, and also reducing the material costs required to manufacture the product.

[0043] In this embodiment, the over / under voltage protector further includes a limiting structure, which includes: two limiting members 4, respectively disposed on the first housing 11 and the second housing 12; that is, one limiting member 4 is disposed on the first housing 11 and one limiting member 4 is disposed on the second housing 12, and the positions of the two limiting members 4 are staggered, i.e., not on the same straight line; and two limiting grooves 5, also disposed on the first housing 11 and the second housing 12, corresponding to the positions of the limiting members 4, and adapted to allow the first housing 11 to be inserted into the second housing 12, so as to limit the relative positions of the first housing 11 and the second housing 12, so that when installing the first housing 11 and the second housing 12, they can only be installed in one correct direction, avoiding installation errors and improving installation efficiency.

[0044] Both the limiting member 4 and the limiting groove 5 are provided on the insulating member 3. In this embodiment, the limiting member 4 is provided at one end of the insulating member 3, that is, at the end away from the outer edge of the shell body 1.

[0045] As an alternative implementation, the limiting member 4 can be set at any position on the insulating member 3, that is, at the middle or both ends, and can still play the role of limiting and preventing incorrect installation of the first housing 11 and the second housing 12.

[0046] Furthermore, please refer to Figures 2 to 4As shown, the housing body 1 has an internal receiving cavity 13, which is jointly formed by a first housing 11 and a second housing 12. A circuit board 8 and a relay 7 are disposed within the receiving cavity 13. The relay 7 is fixedly mounted on the circuit board 8; specifically, the relay 7 is soldered onto the circuit board 8. By soldering the relay 7 onto the circuit board 8, compared to the prior art, the method of connecting the relay 7 and the circuit board 8 via connecting wires reduces the electrical clearance between the relay 7 and the circuit board 8, reduces the width of the housing body 1, and thus reduces the size of the over / under voltage protector, achieving product miniaturization.

[0047] Additionally, it includes an N-pole connecting plate 9, which is electrically connected to the wiring assembly 2 and located below the relay 7. Because the N-pole connecting plate 9 is N-shaped, the relay 7 can be installed in the recessed portion of the N-pole connecting plate 9, further reducing the internal space of the housing body 1, reducing the width of the housing body 1, and thus reducing the size of the over / under voltage protector.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An over / under voltage protector, characterized in that, include: A slot (111) is provided on the side wall of the first housing (11) along its length; A connecting rod (121) is provided on the second housing (12), and a fixing structure (122) adapted to the slot (111) is provided on the connecting rod (121). The fixing structure (122) is inserted into the slot (111). An anti-sway structure (6) is provided on the first housing (11) and is located near the slot (111); The connecting rods (121) are four symmetrically arranged on the side wall of the second housing (12); Both ends of the first housing (11) and the second housing (12) are provided with wiring spaces (14). The anti-sway structure (6) is located between at least two connecting rods (121) on the same side wall and is provided on the plate of the first housing (11) that forms the wiring space (14). The anti-sway structure (6) located between at least two connecting rods (121) on the same side wall abuts against the adjacent surfaces of the two connecting rods (121) on both sides. The anti-sway structure (6) provided on the plate of the first housing (11) that forms the wiring space (14) is an anti-sway block that abuts against the connecting rods (121).

2. The over / under voltage protector according to claim 1, characterized in that, The anti-sway block is provided with a guide surface (61) to facilitate the insertion of the connecting rod (121).

3. The over / under voltage protector according to claim 1, characterized in that, One side of the free end of the connecting rod (121) protrudes outward to form the fixed structure (122).

4. The over / under voltage protector according to any one of claims 1-3, characterized in that, Also includes: Wiring assembly (2) is disposed within the wiring space (14), and the wiring assembly (2) includes at least two pairs of terminals (21).

5. The over / under voltage protector according to claim 4, characterized in that, Also includes: An insulating element (3) is provided in the wiring space (14), the insulating element (3) being located between each pair of the wiring terminals (21).

6. The over / under voltage protector according to claim 5, characterized in that, It also includes a limiting structure, the limiting structure comprising: The limiting member (4) has at least two, which are respectively disposed on the first housing (11) and the second housing (12), and the two limiting members (4) are staggered; A limiting groove (5) is provided on the first housing (11) and the second housing (12), and corresponds to the position of the limiting member (4), and is suitable for the first housing (11) to be inserted into the second housing (12) to limit the relative position of the first housing (11) and the second housing (12).

7. The over / under voltage protector according to claim 6, characterized in that, The limiting member (4) and the limiting groove (5) are both provided on the insulating member (3).

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