Riveting wire type protector

Abstract

The utility model relates to the technical field of protectors, in particular to a riveting wire type protector, which comprises a shell, a connecting piece and a connecting piece, the static contact mechanism comprises a static contact piece, a static contact pin connected with the static contact piece, and a static contact. The movable contact mechanism comprises a bottom plate, a movable contact pin connected with the bottom plate, a heating element arranged on the bottom plate, a movable contact assembly fixedly connected with the bottom plate, and a movable contact arranged opposite to the static contact; the static contact mechanism and the movable contact mechanism penetrate through and are fixedly connected with the fixed seat; the fixed seat comprises a first sealing block and a second sealing block; when the movable contact assembly is reset, the movable contact can be in contact with the static contact, and when the movable contact assembly acts, the movable contact is far away from the static contact. According to the utility model, the fixed block is fixedly connected with the static contact mechanism and the movable contact mechanism, so that the assembly complexity is reduced, the sealing performance of equipment is improved, external pollutants and glue are prevented from entering key parts of the protector, and the qualified rate of the protector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of protectors, in particular to a wire-riveting type protector. Background Art

[0002] A protector is a device used to monitor and protect the normal operation of electrical equipment under abnormal working conditions. Common functions include overload protection, short-circuit protection, overvoltage protection, and leakage protection, etc. To ensure that the protector can work properly in various complex environments, its shell is usually sealed to prevent external pollutants such as dust and moisture from entering the interior of the device and affecting the operation of internal components. Sealing with glue injection is a commonly used sealing method. By injecting sealing glue at the opening of the shell and allowing it to cure to form a sealing layer, the influence of the external environment on the device is blocked.

[0003] In the prior art, the sealing method of the protector by glue injection mainly involves injecting liquid or semi-liquid sealing glue at the seams, openings or cable interfaces of the shell, and forming a sealing structure through natural or accelerated curing.

[0004] However, the inventor found in actual applications that there may be a risk of glue seeping into the interior of the protector during the operation of the existing glue injection sealing method. Especially when the amount of glue injection is not properly controlled or the sealing structure design is unreasonable, the glue will flow into the internal space of the protector, affecting the normal operation of internal electronic components. Therefore, there is an urgent need for a new sealing structure that can effectively seal the shell of the protector while preventing glue from entering the internal space, thereby improving the qualification rate of the product. Summary of the Utility Model

[0005] In view of at least one of the above technical problems, the utility model provides a wire-riveting type protector, which realizes active yielding through the improvement of the support structure.

[0006] According to the first aspect of the utility model, a wire-riveting type protector is provided, including:

[0007] A shell, one end face of which has an opening, and the interior of which has an accommodation chamber;

[0008] A static contact mechanism, arranged inside the accommodation chamber, including a static contact piece, a static contact pin connected to one end of the static contact piece and extending into the interior of the shell, and a static contact point fixedly connected to the other end of the static contact piece;

[0009] A moving contact mechanism, arranged inside the accommodation chamber, including a bottom plate, a moving contact pin connected to one end of the bottom plate and extending outside the shell, a moving contact assembly fixedly connected to the other end of the bottom plate, and a moving contact point arranged opposite to the static contact point on the moving contact assembly;

[0010] The fixed seat, the static contact piece and the bottom plate pass through the fixed seat and are fixedly connected. The fixed seat includes a first sealing block arranged inside the accommodation space and a second sealing block arranged at the opening. The fixed seat is integrally formed by injection molding.

[0011] In some embodiments of the present utility model, the moving contact assembly includes a bimetallic strip parallel to the bottom plate and a moving contact piece. The bimetallic strip is arranged between the bottom plate and the moving contact piece.

[0012] In some embodiments of the present utility model, there is at least one rivet on the bottom plate. Openings are provided on the bimetallic strip and the moving contact piece at positions opposite to the rivet. The rivet extends into the opening and is fixedly connected.

[0013] In some embodiments of the present utility model, there is also a limiting block on the bottom plate. The limiting block protrudes towards the direction of the bimetallic strip. After the bimetallic strip is heated and flipped, the limiting block contacts the bimetallic strip.

[0014] In some embodiments of the present utility model, there is also a convex bump protruding on the end face of the moving contact piece facing the bimetallic strip. When the bimetallic strip is heated and flipped, the edge of the bimetallic strip contacts the convex bump.

[0015] In some embodiments of the present utility model, there is also an extension section at the contact position between the second sealing block and the opening. The extension section fits with the outer shell.

[0016] In some embodiments of the present utility model, there is at least one connecting strip between the first sealing block and the second sealing block.

[0017] In some embodiments of the present utility model, there are also reinforcing ribs on the bottom plate.

[0018] In some embodiments of the present utility model, a glue injection port is provided on the second sealing block.

[0019] In some embodiments of the present utility model, there is also a sealing ring at the connection position between the second sealing block facing the external space and the static contact pin and the moving contact pin.

[0020] The beneficial effects of the present utility model are as follows: Through the fixed connection between the fixed seat, the static contact piece and the bottom plate, the overall structure of the present utility model is simplified, the complexity of assembly is reduced, the assembly is made more rapid and precise, and the human error in production is reduced; By adopting the double-sealing design of the first sealing block and the second sealing block, the sealing performance of the protector is effectively improved. It not only prevents external pollutants such as dust and water vapor from entering the interior, thus ensuring the reliable operation of the internal components, significantly reducing the failure rate of the protector during production and use, improving the qualification rate of the equipment, and extending the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the riveting wire type protector in the embodiment of the present utility model;

[0023] Figure 2 It is an exploded schematic structural diagram of the riveting wire type protector in the embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the moving contact mechanism, the static contact mechanism and the fixed seat in the embodiment of the present utility model;

[0025] Figure 4 It is a side view of the opening and closing of the moving contact assembly in the embodiment of the present utility model;

[0026] Figure 5 It is a schematic structural diagram of the fixed seat in the embodiment of the present utility model;

[0027] Figure 6 It is a schematic structural diagram of the moving contact mechanism and the static contact mechanism in the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] As Figures 1 to 6 shown, the rivet wire type protector includes: a housing 1, a static contact mechanism 2, a moving contact mechanism 3 and a fixing base 4.

[0032] One end face of the housing 1 has an opening, and the housing 1 has an accommodation chamber 11 inside. As Figure 1 、 Figure 2 shown, the housing 1 forms a semi-surrounding structure, and the static contact mechanism 3, the moving contact mechanism 3 and the fixing base 4 are accommodated inside the accommodation chamber 11.

[0033] The static contact mechanism 2, as Figure 6 shown, is arranged inside the accommodation chamber 11 and includes a static contact piece 21, a static contact pin 22 connected to one end of the static contact piece 21 and extending into the housing, and a static contact point 23 fixedly connected to the other end of the static contact piece 21;

[0034] The moving contact mechanism 3 is arranged inside the accommodation chamber 11 and includes a bottom plate 31, a moving contact pin 32 connected to one end of the bottom plate 31 and extending outside the housing, a moving contact assembly 34 fixedly connected to the other end of the bottom plate 31, and a moving contact point 35 oppositely arranged to the static contact point 23 on the moving contact assembly 34. As Figure 1 、 Figure 2 shown, through the cooperation of the static contact mechanism 2 and the moving contact mechanism 3, it is ensured that when the moving contact assembly 34 is reset, the moving contact point 35 can reliably contact the static contact point 23 to realize circuit closing; when the moving contact assembly 34 detects abnormal temperature, the moving contact point 35 is separated from the static contact point 23 in time to cut off the circuit, which can effectively protect the equipment, prevent damage to the equipment caused by overload, short circuit and other situations, and improve the action reliability of the protector.

[0035] The static contact piece 21 and the bottom plate 31 pass through the fixing seat 4 and are fixedly connected. The fixing seat 4 includes a first sealing block 41 arranged inside the accommodating space 11 and a second sealing block 42 arranged at the opening. The fixing seat 4 is integrally formed by injection molding. As Figure 1 , Figure 6 shown, the fixing seat 4 is integrally formed with the static contact piece 21 and the bottom plate 31 through the injection molding process, reducing the number of independent components, lowering the complex assembly steps between components, greatly simplifying the production process, shortening the production time, and enhancing the overall production efficiency. Since the static contact piece 21, the bottom plate 31, and the fixing seat 4 are manufactured through the injection molding integral forming process, a tight bond is formed among the three, reducing the structural instability or failure phenomena that may be caused by mechanical connection or fastener loosening. At the same time, it can effectively reduce gaps and joints, avoiding leakage problems caused by loose connections between components, thereby enhancing the sealing performance of the fixing seat 4. Especially in scenarios where dust and water prevention are required, the integral forming can prevent pollutants such as dust and water vapor from entering the interior, extending the service life of the protector. It should be noted here that the integral injection molding of the first sealing block 41 and the second sealing block 42 can be the separate injection molding of the two sealing blocks respectively, or there is a connecting gap between the first sealing block 41 and the second sealing block 42, and the two sealing blocks are integrally injection molded through the connecting gap, or other injection molding integral forming methods.

[0036] When the protector in the present utility model is working specifically, the current flowing path of the circuit is as follows: it flows into the static contact piece 21 through the static contact pin 22, flows through the static contact point 23 on the static contact piece 21 into the moving contact point 35, then flows through the moving contact assembly 34 to the bottom plate 31, and finally the current flows out through the moving contact pin 32 to form a connected circuit. When the protector is working normally, the moving contact assembly 34 does not change, and the moving contact point 35 contacts the static contact point 23, making the protector conduct and connecting the circuit; when a short circuit or abnormal high temperature occurs in the external device, the current flowing through the protector is too large, the temperature of the moving contact assembly 34 rises, deforms, and the moving contact point 35 separates from the static contact point 23, and the circuit of the protector is disconnected to protect the circuit and the external device.

[0037] The present utility model realizes the simplification of the overall structure through the fixed connection of the fixing seat 4, the static contact piece 21, and the bottom plate 31, reduces the complexity of assembly, makes the assembly faster and more accurate, and reduces the human error in production; adopts the double-sealing design of the first sealing block 41 and the second sealing block 42, effectively improving the sealing performance of the protector, not only preventing external pollutants such as dust and water vapor from entering the interior, thus ensuring the reliable operation of the internal components, significantly reducing the failure rate of the protector during production and use, improving the qualified rate of the equipment, and extending the service life of the product.

[0038] AsFigure 4 As shown, in some embodiments of the present utility model, the moving contact assembly 34 includes a bimetallic strip 34a parallel to the bottom plate 31 and a moving contact piece 34b. The bimetallic strip 34a is disposed between the bottom plate 31 and the moving contact piece 34b. In the specific working process, when a short circuit or abnormal high temperature occurs in the circuit, the temperature of the bimetallic strip 34a rises, deforms, and flips. The flipped bimetallic strip 34a abuts against the moving contact piece 34b, pushing the moving contact piece 34b to move away from the static contact, so that the moving contact 35 on the moving contact piece 34b is separated from the static contact 23, disconnecting the protector circuit, thereby disconnecting the circuit connection in the external device, protecting the external circuit and device, and preventing damage caused by equipment short circuit or abnormal high temperature; when the external temperature drops, the temperature of the bimetallic strip 34a also decreases accordingly, flipping back to the initial position again, and the moving contact 35 contacts the static contact 23, making the circuit of the protector resume conduction, and the external device also resumes normal operation. In the present utility model, the change in temperature is sensed by the bimetallic strip 34a, and the flipping of the bimetallic strip 34a drives the moving contact 35 on the moving contact piece 34b to approach or move away from the static contact 23, so as to realize the connection and disconnection of the circuit in the protector.

[0039] As Figure 2 , Figure 3 shown, the bottom plate 31 has at least one rivet 31a. The bimetallic strip 34a and the moving contact piece 34b are provided with openings 34c opposite to the position of the rivet 31a. The rivet 31a extends into the opening 34c and is fixedly connected. Fixing the bimetallic strip 34a and the moving contact piece 34b on the bottom plate 31 through the rivet 31a can ensure the firm connection between the components, avoid loosening or displacement of the components due to factors such as vibration or thermal expansion and contraction during the working process, improve the structural stability and service life of the entire moving contact mechanism 3, and ensure good contact and performance during long-term operation.

[0040] The bottom plate 31 also has a limiting block 33, which protrudes towards the bimetallic strip 34a. After the bimetallic strip 34a is heated and flipped, the limiting block contacts the bimetallic strip 34a. As Figure 2 , Figure 4 , Figure 6As shown, when a short circuit or abnormal high temperature occurs in the external device, the bimetal 34a flips. After flipping, the lower surface of the bimetal 34a contacts the limit block 33, and the limit block 33 plays a supporting role for the bimetal 34a, causing the bimetal 34a to push the moving contact piece 34b away, and the moving contact 35 is separated from the static contact 23. When the bimetal 34a flips due to heat, the limit block 33 can limit the flipping angle of the bimetal 34a after flipping, preventing the bimetal 34a from being overly deformed or having an insufficient deformation position, resulting in the bimetal 34a being unable to flip to the set position and unable to push the moving contact piece 34b away, thus affecting the normal contact or separation between the moving contact 35 and the static contact 23. The setting of the limit block 33 ensures that the action range of the bimetal 34a is within the designed safety range, thereby ensuring the normal operation of the protector.

[0041] In some embodiments of the present invention, as Figure 3 shown, the end face of the moving contact piece 34b facing the bimetal 34a also has a convex hull 34b1 provided in a protruding manner. When the bimetal 34a flips due to heat, the edge of the bimetal 34a contacts the convex hull 34b1. The setting of the convex hull 34b1 enables the bimetal 34a to contact the moving contact piece 34b more accurately and stably when flipping. Due to the protruding design of the convex hull 34b1, a clear contact point will be formed between the edge of the bimetal 34a and the convex hull 34b1, avoiding problems such as poor contact or uneven contact that may be brought about by planar contact. The convex hull 34b1 provides a protruding contact point, and the contact between the edge of the bimetal 34a and the convex hull 34b1 during flipping can reduce the large-area friction and wear during the flipping process, reduce the mechanical wear between components, and can also extend the service life of the bimetal 34a and the moving contact piece 34b.

[0042] As Figure 3 shown, the second sealing block 42 also has an extension section 44 at the contact with the opening, and the extension section 44 fits with the housing 1. The fitting of the extension section 44 with the housing 1 increases the sealing contact area, further blocks external pollutants from entering the interior of the protector, effectively improves the protection ability of the protector. The design of the extension section 44 avoids the sealing method of a single contact surface, effectively reduces the risk of sealing failure caused by local pressure unevenness or material aging, and ensures a long-term stable sealing effect.

[0043] In some embodiments of the present invention, as Figure 3As shown, there is at least one connecting strip 43 between the first sealing block 41 and the second sealing block 42. During the injection molding process, the first sealing block 41 and the second sealing block 42 are connected by the connecting strip 43. During the injection molding process, injection can be carried out through one injection port, which simplifies the process and at the same time avoids the influence of multiple injection ports on the sealing performance of the fixing block. Through the integral injection molding of the connecting strip 43, the precise relative position between the first sealing block 41 and the second sealing block 42 is maintained, reducing the tolerance error caused by multiple injection molding or assembly processes. It should be noted here that the position of the connecting strip 43 can be various. It can be attached to the moving contact pin 32 and the static contact pin 22, or can be set at the edge where the first sealing block 41 or the second sealing block 42 is attached to the housing 1, or any other connectable part.

[0044] There is also a reinforcing rib 31b on the bottom plate. As Figure 3 , Figure 6 shown, the setting of the reinforcing rib 31b can significantly improve the mechanical strength of the bottom plate 31 and enhance its anti-bending and anti-deformation capabilities. During the repeated movement of the moving contact mechanism 3, the bottom plate 31 will bear the mechanical stresses from the moving contact piece 34b, the bimetallic piece 34a and other components. The role of the reinforcing rib 31b can effectively disperse these stresses, prevent the bottom plate 31 from deforming or being damaged during long-term use, and ensure the overall stability of the protector structure.

[0045] As Figure 5 shown, a glue injection port 42a is provided on the second sealing block 42. Through the glue injection port 42a, the sealing material can be directly injected into the inside of the sealing block or the sealing gap to ensure that the sealing area is completely filled. This can effectively enhance the sealing performance and prevent gas, liquid or particulate matter from leaking from the gap, especially in high-pressure or high-temperature environments. At the same time, through the fitting of the first sealing block 41 and the housing 1, the sealing material injected through the glue injection port 42a fills the gap between the first sealing block 41 and the second sealing block 42.

[0046] As Figure 5 shown, a sealing ring 45 is also provided at the connection of the second sealing block 42 facing the external space and the static contact pin 22 and the moving contact pin 32. The sealing ring 45 is fixedly connected to the second sealing block 42. The sealing ring 45 can perform secondary sealing on the second sealing block 42 to prevent the sealing material injected through the glue injection port 42a from flowing out through the gap between the static contact pin 22 and the moving contact pin 32 and the second sealing block 42. At the same time, the sealing ring 45 can also play a supporting role for the static contact pin 22 and the moving contact pin 32.

[0047] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A riveting wire type protector, characterized in that, Comprising: A housing, one end face of the housing has an opening, and an accommodation chamber is provided inside the housing; A static contact mechanism, arranged inside the accommodation chamber, includes a static contact piece, a static contact pin connected to one end of the static contact piece and extending into the housing, and a static contact point fixedly connected to the other end of the static contact piece; A moving contact mechanism, arranged inside the accommodation chamber, includes a bottom plate, a moving contact pin connected to one end of the bottom plate and extending outside the housing, a moving contact component fixedly connected to the other end of the bottom plate, and a moving contact point oppositely arranged to the static contact point on the moving contact component; A fixing seat, the static contact piece and the bottom plate pass through the fixing seat and are fixedly connected, the fixing seat includes a first sealing block arranged inside the accommodation chamber and a second sealing block arranged at the opening, and the fixing seat is integrally formed by injection molding.

2. The riveted wire type protector according to claim 1, characterized in that, The moving contact component includes a bimetallic strip parallel to the bottom plate and a moving contact piece, and the bimetallic strip is arranged between the bottom plate and the moving contact piece.

3. The rivet wire type protector according to claim 2, characterized in that, At least one rivet is provided on the bottom plate, and through holes are provided on the bimetallic strip and the moving contact piece at positions opposite to the rivet, and the rivet extends into the through holes and is fixedly connected.

4. The rivet wire type protector according to claim 2, characterized in that, A limiting block is further provided on the bottom plate, the limiting block protrudes towards the bimetallic strip, and after the bimetallic strip is heated and turned over, the limiting block contacts the bimetallic strip.

5. The rivet wire type protector according to claim 2, characterized in that, A convex bump is further provided on the end face of the moving contact piece facing the bimetallic strip, and when the bimetallic strip is heated and turned over, the edge of the bimetallic strip contacts the convex bump.

6. The rivet wire type protector according to claim 1, characterized in that, An extension section is further provided at the contact position between the second sealing block and the opening, and the extension section fits with the housing.

7. The rivet wire type protector according to claim 1, characterized in that, At least one connecting strip is further provided between the first sealing block and the second sealing block.

8. The rivet wire type protector according to claim 1, characterized in that, Reinforcing ribs are further provided on the bottom plate.

9. The rivet wire type protector according to claim 1, characterized in that, A glue injection port is provided on the second sealing block.

10. The riveting wire type protector according to claim 1, characterized in that, A sealing ring is further provided at the connection position between the second sealing block facing the external space and the static contact pin and the moving contact pin.

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