CN220569629U - Fuse protector - Google Patents

Abstract

The utility model discloses a fuse, which comprises a shell, and a melt, a melt bracket, a first terminal, a second terminal, a first conductive clamp and a second conductive clamp which are arranged in the shell; the first conductive clamp is electrically connected with the first terminal, and the second conductive clamp is electrically connected with the second terminal; the shell is provided with an opening, the melt bracket and the shell are rotationally arranged, and the melt is detachably fixed on the melt bracket; the melt bracket is provided with a first state which is positioned in the shell and clamps the melt and the two conductive clamps, and a second state which is partially moved out of the opening for a user to replace the melt; wherein, the shell is internally provided with an abutting bulge which abuts against the melt bracket when the melt bracket is in the second state, so as to ensure that the melt bracket is stably in the second state; the utility model has the characteristics of being convenient for a user to replace the melt and the like.

Description

Fuse protector

Technical Field

The present utility model relates to a fuse.

Background

The fuse works on the principle that when the current exceeds a certain specified value, the melt in the fuse can be melted due to heat, so that the circuit is disconnected.

Because the fuse body is melted, other parts of the fuse are still perfect, and in order to be more environment-friendly, energy-saving and emission-reducing, a fuse with the fuse body capable of being replaced is designed by a person skilled in the art. The utility model discloses a fuse mistake proofing mounting structure as disclosed in CN114975033A, it is a fuse that can change the fuse-element, and its concrete principle adopts a rotatory fuse-element support, and the detachable fixing of fuse-element is on the fuse-element support, rotates the fuse-element support and shifts out the casing and can change the fuse-element, and during the installation, with the reverse rotation of fuse-element support for the fuse-element card is gone into in the conductive clamp at both ends and can be accomplished the installation. However, this structure also has a disadvantage in that the melt holder is easily dropped back into the interior of the fuse housing during the process of replacing the melt when the melt holder is moved out of the housing, resulting in great inconvenience in replacement.

Disclosure of Invention

In view of the above, the present utility model aims to overcome the defects in the prior art, and aims to provide a fuse, which improves the melt replacement efficiency.

The utility model provides a fuse, which comprises a shell, and a melt, a melt bracket, a first terminal, a second terminal, a first conductive clamp and a second conductive clamp which are arranged in the shell; the first conductive clamp is electrically connected with the first terminal, and the second conductive clamp is electrically connected with the second terminal; the shell is provided with an opening, the melt bracket and the shell are rotationally arranged, and the melt is detachably fixed on the melt bracket; the melt bracket is provided with a first state which is positioned in the shell and clamps the melt and the two conductive clamps, and a second state which is partially moved out of the opening for a user to replace the melt; wherein, be equipped with the butt arch in the casing, the butt arch is in the second state with it when the fuse-element support is in, in order to guarantee that the fuse-element support is stable in the second state.

By adopting the structure, the abutting bulge is added, so that when the melt bracket is in the second state, one part of the melt bracket can abut against the abutting bulge to ensure that the melt bracket is not easy to fall, the user is facilitated to replace the melt, compared with the prior art, the user is facilitated to replace the melt, and the user only needs to push the melt bracket hard to return to the shell after the replacement.

In some embodiments of the utility model, the abutment projection is in an interference fit with the melt bracket when it abuts against the melt bracket.

The interference fit is favorable for ensuring that the abutting bulge stably abuts against the melt bracket.

In some embodiments of the present utility model, the melt bracket is provided with a bar-shaped rib, one end of the bar-shaped rib is an abutting end, the abutting end is used for abutting against the abutting protrusion, and the abutting end is an inclined plane or an arc surface.

By adopting the structure, the abutting end is an inclined plane or an arc surface, which is very beneficial to the completion of abutting of the melt bracket and the abutting bulge.

In some embodiments of the present utility model, the bar rib is provided with a recess for accommodating the abutment protrusion when the melt bracket is in the first state.

By adopting the structure, the melt bracket can be ensured to contain the abutting bulge, and the abutting bulge is prevented from interfering with the rest part of the melt bracket.

In some embodiments of the utility model, the distance from the abutting end to the rotation center of the melt bracket is greater than the distance from the abutting end to any point of the avoidance recess to the rotation center of the melt bracket.

By adopting the structure, only the abutting end can be effectively ensured to be matched with the abutting bulge, and the abutting bulge is prevented from interfering with the rest part of the melt bracket.

In some embodiments of the present utility model, the abutting protrusion includes a first abutting surface and a second abutting surface, and in the process of rotating the melt bracket to the second state, the melt bracket contacts the first abutting surface first, then contacts the second abutting surface, and finally abuts against the second abutting surface.

By adopting the structure, the stable cooperation of the melt bracket and the butt joint protrusion can be ensured by adopting the arrangement of two sections of contact surfaces.

In some embodiments of the present utility model, the first abutting surface is an arc surface or an inclined surface; and/or the second abutting surface is an arc surface or an inclined surface.

The design of the inclined plane or the cambered surface is beneficial to the formation of abutting fit between the melt bracket and the abutting bulge.

In some embodiments of the utility model, the distance from the melt bracket rotation center to the first interference surface is less than the distance from the melt bracket rotation center to the second interference surface.

By adopting the structure, the distance from the melt bracket rotating center to the first abutting surface is smaller than the distance from the melt bracket rotating center to the second abutting surface, so that the damping force of the melt bracket in contact with the first abutting surface is larger than that in contact with the second abutting surface, and the melt bracket is finally ensured to be more stable on the second abutting surface (a step exists between the first abutting surface and the second abutting surface, and the melt bracket is more stable on the second abutting surface).

In some embodiments of the present utility model, the melt bracket is in an interference fit with both the first and second interference surfaces, and has a greater damping force when in contact with the first interference surface than when in contact with the second interference surface.

By adopting the structure, the damping force of the melt bracket when the first abutting surface contacts is larger than that when the second abutting surface contacts, and even if the damping force of the second abutting surface to the melt bracket is insufficient to ensure that the supporting melt is in the second state, the first abutting surface can be alternatively utilized to enable the supporting melt to be in a state close to the second state.

In some embodiments of the utility model, the jaws of the first and second conductive clips are oppositely facing; and/or the two sides of the first conductive clamp are provided with a first clamping spring and/or the two sides of the second conductive clamp are provided with a second clamping spring.

The structure is favorable for the stable matching of the melt and the conductive clamp.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing a structure of a fuse according to an embodiment of the present utility model with a cover removed (second state);

FIG. 2 shows a diagram of the positional relationship of a melt, terminals, and conductive clips in an embodiment of the present utility model;

FIG. 3 shows a schematic view of the structure of a melt bracket according to an embodiment of the present utility model;

FIG. 4 shows a schematic view of an embodiment of the present utility model with a melt bracket in a first state;

FIG. 5 shows a schematic view of an embodiment of the present utility model with a melt bracket in a second state.

Description of the embodiments

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1-5, an embodiment of the present utility model is a fuse comprising a housing and a melt 2, a melt bracket 3, a first terminal 4, a second terminal 5, a first conductive clip 6, and a second conductive clip 7 disposed within the housing.

The housing comprises an upper cover (not shown) and a base 1, which are fixed by riveting. Of course, besides the riveting fixation, the two can be fastened by screws, fastened by buckles, or fastened by buckles and riveting together, so long as the stable cooperation of the two can be ensured.

The inside of the base 1 is divided into a first wiring chamber, an intermediate chamber, and a second wiring chamber as viewed in the longitudinal direction thereof. The first terminal 4 is located in the first connection cavity, and in this embodiment the first terminal 4 is a screw-type connection terminal, although other forms than such a screw-type connection terminal may be used, such as a cage-type connection terminal, a socket, a plug, etc. In the middle chamber (when the melt bracket 3 is in the first state), a first conductive clip 6, the melt bracket 3 and a second conductive clip 7 are sequentially arranged, wherein the clamping direction of the first conductive clip 6 is downward, the clamping direction of the second conductive clip 7 is upward, and when the melt bracket 3 is in the first state, the melt 2 on the upper part of the melt bracket is just clamped by the first conductive clip 6 and the second conductive clip 7 at the same time. The second terminal 5 is located in the second connection cavity, and in this embodiment, the second terminal 5 is a screw-type connection terminal, and of course, a cage-type connection terminal, a socket, a plug, or the like may be used in addition to such a screw-type connection terminal. The first terminal 4 is electrically connected with the first conductive clip 6, specifically, is contacted by a conductor; the second terminal 5 is electrically connected with the second conductive clip 7, in particular in contact with a conductor; thus, when the melt holder 3 is in the first state, such as if a fuse is in the loop, the melt 2 can blow to protect the load when the current in the loop is not in compliance. Both sides of the first conductive clamp 6 and the second conductive clamp 7 are provided with snap springs (a first snap spring and a second snap spring) so as to prevent elastic fatigue of the first conductive clamp 6 and the second conductive clamp 7.

The melt 2 is detachably arranged on the melt bracket 3 by means of insertion, which is already known in the art and will not be described in detail here. The melt 2 melts when the current is not in compliance, thereby protecting the load, and such a structure is well known and will not be described in detail herein.

A rotating center column 8 is arranged in the middle cavity, a circular ring structure 9 is arranged on the melt bracket 3, and the melt bracket 3 is sleeved on the rotating center column 8 through the circular ring structure 9 so as to form rotating connection of the melt bracket 3. In addition to the rotary connection mode, a pin shaft can be independently arranged, and the pin shaft penetrates through the melt bracket 3 to be fixed with the shell, so that the melt bracket 3 is in rotary arrangement. An opening 10 is provided in the top of the housing, through which opening 10 the melt holder 3 can be partly removed to the outside of the housing for easy replacement of the melt 2 by a user. Specifically, a handle 31 always positioned at the outer side of the shell is arranged on the melt bracket 3, and the handle 31 can drive the melt bracket 3 to rotate so that part of the melt bracket moves out of the outer side of the shell. The melt bracket 3 has two states, namely a first state and a second state, which are distinguished according to the connection of the melt 2 to the first conductive clip 6 and the second conductive clip 7, specifically: the first state corresponds to the state that the melt bracket 3 is positioned in the shell, and meanwhile, two ends of the melt 2 are just clamped by two conductive clamps, and the state that the melt 2 is installed in place can also be called. In the second state, the corresponding melt holder 3 is partly removed from the housing, and the user can just change the state of the melt 2.

The base 1 is provided with the abutment protrusion 11, and the abutment protrusion 11 is arranged on the rotation track of the melt bracket 3, so that when the melt bracket 3 is in the second state, the melt bracket 3 can abut against the abutment protrusion 11 to limit the melt bracket 3 to fall down, thereby facilitating the replacement of the melt 2 by a user. The specific abutting structure mode adopts an interference fit mode, and the interference fit mode is adopted, so that a user can hard push the melt bracket 3 to release the fit between the melt bracket 3 and the abutting bulge 11 after the melt 2 is replaced. More specifically, a bar-shaped rib 32 is provided on the melt bracket 3, one end of the bar-shaped rib 32 is an abutment end 32a, the abutment end 32a is used for abutting against the abutment protrusion 11, the abutment end 32a is an arc surface, and the abutment fit with the abutment protrusion 11 can be completed through the arc surface. Of course, the abutting end 32a may have a slope structure other than the arc surface, and may have a similar effect. The bead 32 of the melt bracket 3 is provided with a relief recess 32b, which relief recess 32b is dimensioned to completely accommodate the abutment projection 11 and to accommodate the abutment projection 11 when the melt bracket 3 is in the first state. The distance D from the abutting end 32a to the rotation center of the melt bracket 3 is larger than the distance D from any point of the abutting end 32a to the avoidance recess 32b to the rotation center of the melt bracket 3, so that only the abutting end 32a can contact the abutting protrusion 11 to form fit in the process of rotating the melt bracket 3 to the second state. The abutting protrusion 11 may be divided into a first abutting surface 11a and a second abutting surface 11b according to the contact sequence with the abutting end 32a, and in the process that the melt bracket 3 rotates to the second state, the melt bracket 3 contacts the first abutting surface 11a first, then contacts the second abutting surface 11b, and finally abuts against the second abutting surface 11 b. The melt bracket 3 is in an interference fit state when being on the first abutting surface 11a and when being on the second abutting surface 11b, and meanwhile, the damping force born by the melt bracket 3 when being on the first abutting surface 11a is larger than the damping force born by the melt bracket 3 when being on the second abutting surface 11 b. In the present embodiment, the reason for the two damping effects is that the distance F from the rotation center of the melt bracket 3 to the first abutting surface 11a is smaller than the distance F from the rotation center of the melt bracket 3 to the second abutting surface 11b, that is, the melt bracket 3 presses more strongly against the first abutting surface 11a and the melt bracket 3 presses more gently against the second abutting surface 11 b. Meanwhile, because of this difference in distance, a step is generated at the junction of the first abutting surface 11a and the second abutting surface 11 b. Of course, as other embodiments, two damping effects may be formed, for example, the first abutting surface 11a is rougher than the second abutting surface 11b, and two damping effects similar to each other may be achieved. In order to facilitate the first abutting surface 11a and the second abutting surface 11b to cooperate with the abutting end 32a, the first abutting surface 11a and the second abutting surface 11b are both cambered surfaces, and of course, a manner of being both cambered surfaces or one cambered surface and one cambered surface being a cambered surface may be adopted.

The abutment projection may be provided on the base, but may be provided on the upper cover, or may be provided on both the upper cover and the base.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A fuse includes a housing, and a melt, a melt bracket, a first terminal, a second terminal, a first conductive clip, and a second conductive clip disposed within the housing; the first conductive clamp is electrically connected with the first terminal, and the second conductive clamp is electrically connected with the second terminal; the shell is provided with an opening, the melt bracket and the shell are rotationally arranged, and the melt is detachably fixed on the melt bracket; the melt bracket is provided with a first state which is positioned in the shell and clamps the melt and the two conductive clamps, and a second state which is partially moved out of the opening for a user to replace the melt; the method is characterized in that: the shell is internally provided with an abutting bulge, and the abutting bulge abuts against the melt bracket when the melt bracket is in the second state, so that the melt bracket is ensured to be stably in the second state.

2. A fuse as defined in claim 1, wherein: the abutting bulge is in interference fit with the melt bracket when abutting against the melt bracket.

3. A fuse as defined in claim 1, wherein: the melt bracket is provided with a strip-shaped rib, one end of the strip-shaped rib is an abutting end, the abutting end is used for abutting against the abutting protrusion, and the abutting end is an inclined plane or an arc surface.

4. A fuse as defined in claim 3, wherein: the strip-shaped ribs are provided with avoidance depressions, and the avoidance depressions are used for accommodating the abutting protrusions when the melt bracket is in a first state.

5. A fuse as defined in claim 3, wherein: the distance from the abutting end to the rotation center of the melt bracket is greater than the distance from the abutting end to any point of the avoidance recess to the rotation center of the melt bracket.

6. A fuse as defined in claim 1, wherein: the butt bulge includes first conflict face and second conflict face melt support to the in-process of second state pivoted, melt support contact in first conflict face earlier, and the back contact second is contradicted the face, finally the butt is on the second conflict face.

7. A fuse in accordance with claim 6, wherein: the first abutting surface is an arc surface or an inclined surface; and/or the second abutting surface is an arc surface or an inclined surface.

8. A fuse in accordance with claim 6, wherein: the distance from the melt bracket rotation center to the first abutting surface is smaller than the distance from the melt bracket rotation center to the second abutting surface.

9. A fuse as defined in claim 1, wherein: the melt bracket is in interference fit with the first abutting surface and the second abutting surface, and the damping force of the melt bracket when the melt bracket contacts with the first abutting surface is larger than that when the melt bracket contacts with the second abutting surface.

10. A fuse as defined in claim 1, wherein: the clamping openings of the first conductive clamp and the second conductive clamp face opposite directions; and/or the two sides of the first conductive clamp are provided with a first clamping spring and/or the two sides of the second conductive clamp are provided with a second clamping spring.