CN216749793U - Fuse protector - Google Patents

Abstract

The application discloses fuse, include: a housing; two guide grooves which are arranged on the outer side of the shell and are oppositely arranged; and the temperature sensor comprises a main body part and a sensitive element, the main body part is inserted into the two guide grooves and clamped with the shell, and the sensitive element is positioned on one side of the main body part, which faces the shell, and is in contact with the shell. The technical scheme of the embodiment of the application can improve the working reliability of the fuse.

Description

Fuse protector

Technical Field

The application relates to the technical field of circuit protection devices, in particular to a fuse.

Background

The fuse is connected in series in the circuit, an internal metal conductor is used as a melt, and when the current exceeds a specified value for a period of time, the melt is fused by heat generated by the melt, so that the circuit is disconnected. The fuse is used as a circuit protection device and widely applied to various industries such as electric power, electronics, new energy automobiles and the like.

How to improve the working reliability of the fuse is a technical problem to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problem, the present application provides a fuse to improve operational reliability of the fuse.

The application provides a fuse including: a housing; two guide grooves which are arranged on the outer side of the shell and are oppositely arranged; and the temperature sensor comprises a main body part and a sensitive element, the main body part is inserted into the two guide grooves and clamped with the shell, and the sensitive element is positioned on one side of the main body part, which faces the shell, and is in contact with the shell.

In the scheme of the embodiment of the application, a temperature sensor is installed in the outer side of the shell of the fuse in a plug-in mounting and clamping manner, and the temperature sensor can be reliably fixed, so that a sensitive element of the temperature sensor can be reliably contacted with the shell to monitor the temperature of the surface of the shell in real time, namely, the actual working temperature of the fuse is monitored. When the temperature on the surface of the shell exceeds the working temperature range applicable to the fuse, proper measures can be taken to effectively protect the normal work of the fuse, the working reliability of the fuse is improved, and the safety of a circuit is further ensured.

In some embodiments, the housing is provided with a first clamping portion between the two guide grooves, and one side of the main body portion facing the housing is provided with a second clamping portion clamped with the first clamping portion.

The clamping structure designed by the embodiment is relatively hidden, and can play a certain supporting role, so that the damage to the main body part and/or the sensitive element caused by the fact that the temperature sensor is impacted by external force is reduced or even avoided.

In some embodiments, the end of the main body along the insertion direction is provided with at least one limiting protrusion, and the at least one limiting protrusion is limited outside the insertion ends of the two guide grooves.

When first joint portion and second joint portion joint back, limited protruding spacing in position, second joint portion can not continue to remove along the direction of inserting relative to first joint portion, receives the spacing of first joint portion, and second joint portion also can not remove along the direction of extracting relative to first joint portion, and like this, temperature sensor is reliably fixed in the outside of casing.

In some embodiments, the first clamping portion is convex, and includes a first guiding inclined plane, a first transition plane and a first clamping surface which are sequentially arranged along the insertion direction of the main body portion; the second joint portion is protruding form, includes the edge second joint face, second transition plane and the second direction inclined plane that the direction of insertion of main part set gradually, the second joint face with first joint face is relative.

Due to the guiding effect of the first guiding inclined plane and the second guiding inclined plane, the clamping operation of the temperature sensor and the shell is labor-saving, and the mutual abrasion in the clamping process is small. In addition, the first joint portion and the second joint portion of this embodiment design's structural strength is higher, can be so that the joint is more firm, is difficult for the pine to take off.

In some embodiments, the sensing element is disposed between the second clamping portion and the at least one limiting protrusion.

The design of the embodiment can ensure that the stress of the installed temperature sensor is relatively balanced, so that when the middle position of the sensitive element is further improved, because the distance between the insertion starting end and the insertion tail end is relatively far, the interference or damage of the environmental factors outside the shell to the sensitive element can be reduced as much as possible.

In some embodiments, the at least one stopper protrusion includes two stopper protrusions protruding toward opposite sides of the two guide grooves in a one-to-one correspondence.

In the clamping state of the main body part and the shell, the two limiting bulges are correspondingly limited outside the insertion ends of the two guide grooves, so that the stress of the main body part is balanced.

In some embodiments, one of the first clamping portion and the second clamping portion is a protrusion, and the other of the first clamping portion and the second clamping portion is a recess matched with the protrusion.

This embodiment can not realize the joint between them through the structural design of first joint portion and second joint portion with the help of other limit structure for the main part can not remove along inserting direction and extraction direction in two guide slots. In addition, first joint portion with second joint portion also can realize mutual joint with the help of other limit structure.

In some embodiments, the other end of the two guide grooves opposite to the insertion end is a closed end.

This embodiment can realize, behind first joint portion and the joint of second joint portion, receive the spacing of closed end, second joint portion can not continue to remove along the direction of inserting relative to first joint portion, receives the spacing of first joint portion, and second joint portion also can not remove along the direction of extracting relative to first joint portion. In addition, the closed end may not play a limiting role.

In some embodiments, the body portion is removably interference fitted with the two guide slots. Thus, the main body needs to be pushed into the two guide grooves by using relatively large external force, and after the external force is removed, the main body does not slide relative to the two guide grooves. The temperature sensor is fixed on the outer side of the shell in a mode of combining plug-in mounting, clamping and interference fit, so that the temperature sensor can be more firmly fixed.

In some embodiments, the fuse includes two side supporting portions provided at an outer side of the housing and disposed opposite to each other, and the two guide grooves are provided at the two side supporting portions in one-to-one correspondence. The design of the embodiment is convenient for processing two guide grooves, and the insertion operation of the temperature sensor is also convenient.

In some embodiments, the two side supports are integrally formed with the housing. Therefore, the assembly of the side supporting part can be omitted, and the side supporting part is not easy to fall off from the shell or loose, so that the temperature sensor is more reliably fixed.

In some embodiments, the two guide slots extend in a direction parallel to the axis of the housing. The two guide grooves extend linearly, so that the processing is convenient, and the insertion operation of the temperature sensor is also convenient.

In some embodiments, the body portion is flat. Therefore, the temperature sensor is simple and convenient to process and manufacture, and the influence of the temperature sensor on the overall appearance of the fuse after the temperature sensor is installed on the outer side of the shell is small.

In some embodiments, the shape of the housing comprises a cylinder, a cube, or a cuboid. The design scheme of the embodiment of the application can be suitable for fuses of various types and shapes, and the working reliability of the fuses is improved.

In the above embodiment of this application, temperature sensor installs in the casing outside of fuse through the mode of cartridge and joint, can realize reliably fixedly, and temperature sensor's sensitive element consequently can reliably contact with the casing to the temperature of real-time supervision casing surface, that is to say the actual operating temperature of monitoring fuse. When the temperature on the surface of the shell exceeds the working temperature range applicable to the fuse, proper measures can be taken to effectively protect the normal work of the fuse, so that the working reliability of the fuse is improved, and the safety of a circuit is further ensured.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic perspective view of a fuse according to some embodiments of the present application;

FIG. 2 is a schematic perspective view of a fuse according to some embodiments of the present application prior to installation of a temperature sensor;

fig. 3 is a schematic perspective view of a temperature sensor according to some embodiments of the present disclosure.

FIG. 4 is a schematic cross-sectional view of a fuse according to some embodiments of the present application;

FIG. 5 is a top view of a temperature sensor in some embodiments of the present application after installation;

fig. 6 is a schematic diagram illustrating a clamping process of the second clamping portion and the first clamping portion according to some embodiments of the present application; and

fig. 7 is a schematic diagram illustrating a clamping process of the second clamping portion and the first clamping portion according to another embodiment of the present application.

The reference numbers in the detailed description are as follows:

a 100-fuse; 110-a housing; 120-side supporting part; 121-a guide groove; 1210-an insertion end;

130-a temperature sensor; 131-a body portion; 132-a sensing element; 111-a first snap-in part;

111 a-a first guide ramp; 111 b-a first transition plane; 111 c-a first clamping surface;

133-a second snap-in portion; 133 a-a second guide ramp; 133 b-a second transition plane;

133c — a second clamping ramp; 134-a limit bump; 150-melt; 160-terminal;

112-a cylindrical extension; 113-an end cap portion; 140-a conductive support; 141-conductive support.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The fuse is connected in series in the circuit, an internal metal conductor is used as a melt, and when the current exceeds a specified value for a period of time, the melt is fused by heat generated by the melt, so that the circuit is disconnected. The fuse has simple structure and convenient use, and is widely applied to various industries such as electric power, electronics, new energy automobiles and the like.

The fuse element is used as a core element of the fuse, and the fusing characteristic of the fuse element is closely related to the material, the shape and the size of the fuse element. The fuses can be divided into high-voltage fuses and low-voltage fuses according to the use voltage; fuses for protecting transformers and general electric devices, fuses for protecting voltage transformers, fuses for protecting power capacitors, fuses for protecting semiconductor elements, fuses for protecting motors, and fuses for protecting household electric appliances, etc. may be classified according to the objects to be protected; they can be classified into open type, semi-closed type, tubular type and expulsion type fuses according to their structures; the fuse can be divided into general purpose fuses, backup fuses and full range fuses according to the breaking current range. The melt parameters used for different types of fuses are different. For example, a melt made mainly of a low melting point material such as lead or lead alloy has the characteristics of low melting point, easy fusing, large resistivity, and relatively large cross-sectional size, while a melt made mainly of a high melting point material such as silver or copper has the characteristics of high melting point, difficult fusing, small resistivity, and relatively small cross-sectional size.

The inventor of the present application has noticed that some fuses in the related art are often in an over-temperature use state due to an over-high indoor or outdoor temperature, or an abnormal condition of the fuse itself, that is, the actual working temperature of the fuse (generally reflected by the temperature of the fuse housing) exceeds the working temperature range applicable to the fuse, so that the ambient temperature around the fuse body is also increased accordingly. Because the fusing of fuse-element is directly caused by heat, when the actual operating temperature of fuse-element is too high, even if the current through the fuse-element does not reach the specified value, the fuse-element can also be fused by the influence of ambient temperature, lead to the fuse-element can't normally exert its fusing function, lose the circuit protection meaning, still can bring the safety hidden danger.

Based on the above-mentioned technical problems, the inventors have conducted extensive studies to provide a design scheme of a fuse to improve the operational reliability of the fuse.

In the design scheme of this application embodiment, a temperature sensor is installed through the mode of cartridge and joint in the casing outside of fuse, and temperature sensor can be reliably fixed to, temperature sensor's sensitive element can reliably contact with the casing, carries out real-time supervision to the temperature on casing surface, also namely monitors the actual operating temperature of fuse. When the temperature of the surface of the shell exceeds the applicable working temperature range of the fuse, appropriate measures (such as circuit breaking, current reduction, or applicable melt replacement) can be taken to effectively protect the normal operation of the fuse, and further the safety of the circuit is guaranteed. The design scheme of the embodiment of the application can effectively improve the working reliability of the fuse.

The fuse provided by the embodiment of the application can be fuses in circuit systems of various industries such as electric power, electronics and new energy vehicles, the type of the fuse is not limited, and the fuse can be various types of fuses.

As shown in fig. 1 and 2, a fuse 100 according to some embodiments of the present disclosure includes a housing 110, two guide slots 121 disposed outside the housing 110 and opposite to each other, and a temperature sensor 130 inserted into the two guide slots 121 and engaged with the housing 110.

As shown in fig. 2 and 3, the temperature sensor 130 includes a main body 131 and a sensing element 132, wherein the main body 131 is inserted into the two guide slots 121 and is clamped with the housing 110, and the sensing element 132 is located on a side of the main body 131 facing the housing 110 and is in contact with the housing 110.

In the present embodiment, one end of the two guide grooves 121 into which the body portion 131 is inserted is defined as the insertion end 1210 thereof, one end of the body portion 131 that first enters the two guide grooves 121 is defined as a start end (i.e., an insertion start end) thereof in the insertion direction, and the other end thereof is defined as an end (i.e., an insertion end) of the body portion 131 in the insertion direction.

Fig. 4 is a schematic cross-sectional view of the fuse 100 according to some embodiments of the present disclosure, which may more clearly illustrate the structure of the fuse 100. To perform the circuit protection function of the fuse 100, the main structure of the fuse 100 further includes a conductive holder 140 located in the housing 110, a fuse element 150 that is mounted on the conductive holder 140 and is removably replaceable, and two terminals 160 (also called contact blades) connected to the conductive holder 140 and extending out of the housing 110. The material, shape and size of the melt 150 may be selected according to actual requirements, and the present application is not limited thereto.

The housing 110 serves as a surface structure of the fuse 100 for forming a receiving space for receiving the fuse element 150, the conductive holder 140, and the like. In the present application, the side defining the accommodating space of the housing 110 is the inner side of the housing 110, and the side of the housing 110 visually visible in appearance is the outer side of the housing 110.

The shape of the housing 110 is not limited, and the shape of the housing 110 may be different according to the type of the fuse 100. For example, the shape of the housing 110 may be cylindrical, square, or rectangular parallelepiped, etc.

As shown in fig. 4, in some embodiments of the present application, the housing 110 includes a cylindrical extension 112 and two end cap portions 113 closing both ends of the cylindrical extension 112. The conductive support 140 includes two conductive support portions 141 disposed oppositely, and two ends of the melt 150 are fixed to the two conductive support portions 141 in a one-to-one correspondence.

In other embodiments of the present application, the shell extends in a cylindrical shape, the conductive support includes two conductive end caps for sealing two ends of the shell, and two ends of the melt are fixed to the two conductive end caps in a one-to-one correspondence.

The specific structural style of the fuse 100 in the present application is not limited to the above embodiments, and the fuse 100 may be designed according to the type and specification of the fuse 100.

As shown in fig. 1, 2, 4 and 5, in the embodiment of the present application, two guide grooves 121 are oppositely disposed on the outer side of the housing 110, and the two guide grooves 121 are open oppositely and extend in the same direction (some drawings do not show all the guide grooves due to view angle or structural obstruction). After being inserted into the two guide grooves 121, the body 131 of the temperature sensor 130 is restricted to move only in the extending direction of the guide grooves 121 and maintain a set gap with the housing 110 before being engaged with the housing 110. After the body 131 is inserted into the two guide grooves 121 to be engaged with the housing 110, the movement of the body 131 in the extending direction of the guide grooves 121 is also restricted, and finally the temperature sensor 130 is reliably fixed to the outside of the housing 110.

The sensing element 132 of the temperature sensor 130 can be reliably contacted with the housing 110 through reasonable structural size design, for example, the gap between the main body portion 131 and the housing 110 is designed to be slightly smaller than the height of the sensing element 132 protruding from the main body portion 131. Since the temperature sensor 130 is firmly fixed and does not shake or shift, the sensing element 132 can reliably contact with the housing 110, and the temperature of the surface of the housing 110, that is, the actual operating temperature of the fuse 100, can be monitored in real time.

In the embodiment of the present application, the temperature sensor 130 can convert the monitored temperature into a signal to output in a wired or wireless manner. For example, in some embodiments, the main body 131 of the temperature sensor 130 serves as a mounting carrier for the sensing element 132, and the sensing element 132 outputs a signal to the outside in a wired manner (wires are not shown in the figure, and can be routed through some wire slot designs of the main body 131). For example, in other embodiments, the main body 131 of the temperature sensor 130 not only serves as a mounting carrier for the sensing element 132, but also has a wireless communication module (not shown) disposed inside, and the sensing element 132 outputs a signal to the outside in a wireless manner through the wireless communication module. The present application is not limited to a specific type of the temperature sensor 130, and may be, for example, a thermocouple type temperature sensor or a thermistor type temperature sensor.

When the temperature of the surface of the housing 110 exceeds the applicable working temperature range of the fuse, appropriate measures can be taken to effectively protect the normal operation of the fuse 100, thereby ensuring the safety of the circuit. For example, an alarm device is arranged in the circuit, and when the temperature of the surface of the shell 110 exceeds the applicable working temperature range of the fuse, the alarm device gives an alarm to prompt relevant personnel to take appropriate measures as soon as possible, such as cutting off the circuit, reducing the current or replacing the applicable melt body. For example, an automatic control device is provided in the circuit, and when the temperature of the surface of the housing 110 exceeds the working temperature range suitable for the fuse, the automatic control device can automatically execute the operations of cutting off the circuit or reducing the current. Therefore, the technical solution of the embodiment of the present application can improve the operational reliability of the fuse 100.

In addition, after the temperature sensor 130 is fixed to the housing 110 by means of combination of insertion and clamping, the body 131 is limited by the two guide grooves 121 to maintain a set gap with the housing 110, so that mutual damage between the temperature sensor 130 and the housing 110 can be reduced or even avoided.

As shown in fig. 1 and 4, in some embodiments of the present application, the fuse 100 includes two side supporting portions 120 disposed outside the housing 110 and disposed opposite to each other, and two guide grooves 121 are disposed on the two side supporting portions 120 in a one-to-one correspondence. In this embodiment, the two side supporting portions 120 protrude from the surface of the housing 110, and the two side supporting portions 120 and the housing 110 are integrally formed, so that the assembly of the side supporting portions 120 can be omitted, and the side supporting portions 120 are not easily detached from the housing 110 or loosened, so that the temperature sensor 130 is more reliably fixed. In other embodiments of the present application, the two side supporting portions may be fabricated and assembled with the housing, as long as they are firmly fixed.

In other embodiments of the present application, a groove may be directly formed on the surface of the housing, the groove extends to one end of the housing as an insertion end, and the guide grooves are respectively formed on two opposite side walls of the groove. In these embodiments, the slotted portion of the housing is thinned relative to the other portions, and the temperature sensor has its sensing element in contact with the bottom wall of the slot after installation.

As shown in fig. 4, in some embodiments of the present disclosure, the housing 110 has a cylindrical shape (which may also have a square, rectangular or other cylindrical shape), and two guide grooves 121 (only one guide groove 121 of which is shown) extend along a direction parallel to an axis of the housing 110 (as indicated by the dashed center line in the figure). The axis of the housing 110 is understood here to mean a line connecting the geometric centers of two opposite end faces of the housing 110, from which the two terminals 160 of the fuse 100 can be led out. The two guide grooves 121 in this embodiment are designed to extend linearly. As shown in fig. 1, since the temperature sensor 130 has a relatively small size, the body 131 of the temperature sensor 130 may be designed to have a flat plate shape, so that the guide groove 121 and the temperature sensor 130 are both easy to manufacture, and the temperature sensor 130 has little influence on the overall outer shape of the fuse 100 after being mounted on the outside of the housing 110.

The present application is not limited to the above-described embodiment with respect to the design of the two guide grooves 121 and the body portion 131. In other embodiments of the present application, for example, the two guide grooves may also extend in other directions, the two guide grooves may extend in an arc shape, and accordingly, the main body of the temperature sensor is designed in a curved shape corresponding to the arc shape, and the temperature sensor has less influence on the overall shape of the fuse after being mounted on the outer side of the housing.

As shown in fig. 4 and 5, wherein fig. 5 is a top view of the temperature sensor 130 after being installed in some embodiments of the present application. The housing 110 has a first engaging portion 111 between the two guide grooves 121, and a second engaging portion 133 engaged with the first engaging portion 111 is provided on one side of the body portion 131 facing the housing 110. The clamping structure of the first clamping portion 111 and the second clamping portion 133 is located between the two guide grooves 121, the structure is hidden, a certain supporting effect can be achieved, and damage to the main body portion 131 and/or the sensitive element 132 caused by impact of external force on the temperature sensor 130 is reduced or even avoided.

In some embodiments of the present application, the first clamping portion and the second clamping portion are structurally designed, and are clamped in combination with other limiting structures, so that the main body portion cannot move in the two guide grooves along the insertion direction and the extraction direction.

As shown in fig. 1, 2, 3, 4 and 5, in these embodiments, the body part 131 is provided at the end in the insertion direction with at least one limiting protrusion 134, and the at least one limiting protrusion 134 is limited outside the insertion end 1210 of the two guide grooves 121.

The specific number, shape and direction of extension of the restraining protrusions 134 are not limited. As shown in fig. 2 and 3, in some embodiments, the end of the main body 131 in the insertion direction is provided with two limiting protrusions 134, the two limiting protrusions 134 protrude toward the opposite sides of the two guide grooves 121 in a one-to-one correspondence, and the end of the main body 131 in the insertion direction is substantially T-shaped. The design of the limiting projection 134 of this embodiment does not increase the overall thickness of the temperature sensor 130. The two limiting protrusions 134 are correspondingly limited outside the insertion ends 1210 of the two guide grooves 121, so that the stress of the main body 131 is balanced.

In other embodiments, as shown in fig. 4, the limiting protrusion 134 may be a bent protrusion bent away from the surface of the housing 110.

In these embodiments, by means of a reasonable structural dimensioning: after the first clamping portion 111 and the second clamping portion 133 are clamped, the second clamping portion 133 cannot move relative to the first clamping portion 111 in the inserting direction due to the limitation of the limiting protrusion 134, and cannot move relative to the first clamping portion 111 in the pulling direction due to the limitation of the first clamping portion 111, so that the temperature sensor 130 is reliably fixed on the outer side of the shell 110.

In other embodiments of the present application, the other end of the two guide grooves opposite to the insertion end is a closed end, which can be realized by reasonable structural size design: when the first clamping portion and the second clamping portion are clamped, the second clamping portion cannot move relative to the first clamping portion in the inserting direction due to the limitation of the closed end, and cannot move relative to the first clamping portion in the pulling direction due to the limitation of the first clamping portion. In this embodiment, the insertion end of the main body portion does not need to be provided with a limiting projection, and the temperature sensor can be reliably fixed on the outer side of the housing.

As shown in fig. 5, in some embodiments of the present application, the body part 131 is provided with a stopper protrusion 134 at an end in the insertion direction, and the other ends of the two guide grooves 121 opposite to the insertion end 1210 are closed ends. Although one end of each of the two guide grooves 121 is designed to be a closed end, the closed end does not play a role in limiting, and after the first clamping portion 111 and the second clamping portion 133 are clamped, the second clamping portion 133 cannot move relative to the first clamping portion 111 continuously along the insertion direction due to the limitation of the limiting protrusion 134.

Referring to fig. 4 and 5, in some embodiments of the present application, the sensing element 132 is disposed between the second catching portion 133 and the limiting protrusion 134. For example, the second catching portion 133 is disposed at a position near the insertion start end of the main body portion 131, the stopper protrusion 134 is disposed at the insertion end of the main body portion 131, and the sensing element 132 is disposed near the middle position of the main body portion 131 in the insertion direction.

The design of this embodiment can make the stress of the installed temperature sensor 130 more uniform, thereby further improving the reliability of the contact between the sensing element 132 and the housing 110. When the sensing element 132 is close to the middle position of the main body 131 in the insertion direction, interference or damage of the sensing element 132 by environmental factors outside the housing 110 can be minimized due to the relatively long distance between the insertion start end and the insertion end.

Fig. 6 is a schematic diagram illustrating a clamping process of the second clamping portion 133 and the first clamping portion 111 according to some embodiments of the present application. In these embodiments, the first catching portion 111 is convex and includes a first guide slope 111a, a first transition plane 111b, and a first catching surface 111c sequentially arranged in the insertion direction (as indicated by a solid arrow in the drawing) of the body portion 131, and the second catching portion 133 is convex and includes a second catching surface 133c, a second transition plane 133b, and a second guide slope 133a sequentially arranged in the insertion direction of the body portion 131. The second clamping portion 133 and the first clamping portion 111 are in a clamping state, and the second clamping surface 133c is opposite to the first clamping surface 111 c.

The first guiding inclined surface 111a forms a certain inclined angle with the surface of the housing 110, the first transition plane 111b is substantially parallel to the surface of the housing 110, and the first engaging surface 111c may form a right angle included angle or an acute angle included angle with the surface of the housing 110. Accordingly, the second guiding inclined surface 133a forms a certain gradient angle with the surface of the main body portion 131, the second transition plane 133b is substantially parallel to the surface of the main body portion 131, and the second engaging surface 133c may form a right angle or an acute angle with the surface of the housing 110 (designed to cooperate with the first engaging surface 111 c).

As shown in fig. 6, the clamping operation of the second clamping portion 133 and the first clamping portion 111 can be roughly divided into three stages. First, the second guiding inclined plane 133a slides relative to the first guiding inclined plane 111a, the second engaging portion 133 is elastically deformed (the first engaging portion 111 may also be elastically deformed), then the second transition plane 133b slides relative to the first transition plane 111b, the second engaging portion 133 is still in an elastically deformed state (the second engaging portion 133 may also be in an elastically deformed state), and finally, the second engaging portion 133 crosses over the first engaging portion 111, the second engaging portion 133 is deformed and restored (the second engaging portion 133 is also deformed and restored), the second engaging surface 133c is opposite to the first engaging surface 111c, and the second engaging portion 133 is restricted by the first engaging surface 111c and cannot move in the pulling direction.

Due to the guiding effect of the first guiding inclined surface 111a and the second guiding inclined surface 133a, the clamping operation of the temperature sensor 130 and the shell 110 is labor-saving, and the mutual abrasion in the clamping process is small. In addition, the first clamping portion 111 and the second clamping portion 133 designed in this embodiment have higher structural strength, so that clamping is firmer and is not easy to loosen.

In some embodiments of the present application, the first clamping portion and the second clamping portion can be clamped together without using other limiting structures, so that the main body portion cannot move in the two guide grooves along the insertion direction and the extraction direction.

As shown in fig. 7, in these embodiments, one of the first and second clamping portions 111 and 133 has a convex shape, and the other of the first and second clamping portions 111 and 133 has a concave shape matching the convex shape. For example, the first clamping portion 111 is concave, the second clamping portion 133 is convex, and when the second clamping portion 133 is not clamped with the first clamping portion 111, the height of the second clamping portion 133 protruding from the main body portion 131 may be slightly greater than the gap between the main body portion 131 and the housing 110, or the second clamping portion 133 is elastically deformed in the gap between the main body portion 131 and the housing 110; after the second clamping portion 133 and the first clamping portion 111 are clamped, the second clamping portion 133 falls into the recessed space of the first clamping portion 111, so that the second clamping portion is limited by the first clamping portion 111 and is not easy to separate from the first clamping portion 111. In this embodiment, the first clamping portion 111 and the second clamping portion 133 can be clamped by the convex-concave shape fit of the two clamping portions, and the second clamping portion 133 cannot move along the inserting direction and the extracting direction relative to the first clamping portion 111 after clamping. Therefore, the temperature sensor 130 can also be reliably fixed to the outside of the housing 110.

In some embodiments of the present application, the main body 131 and the two guide grooves 121 are assembled in a clearance manner, and the combination of the insertion and the clamping ensures a reliable and fixed installation of the temperature sensor 130 outside the housing 110.

In other embodiments of the present application, the main body portion and the two guide grooves may be detachably assembled by interference. The interference fit is understood to mean that the body portion is dimensioned slightly larger than the dimensions defined by the two guide grooves, which produce a tightening force on the body portion when the body portion is inserted into the two guide grooves. Thus, the main body needs to be pushed into the two guide grooves by using relatively large external force, and after the external force is removed, the main body does not slide relative to the two guide grooves. The temperature sensor is fixed on the outer side of the shell in a mode of combining plug-in mounting, clamping and interference fit, so that the temperature sensor can be fixed more firmly.

As shown in fig. 1, 2, 3 and 6, some embodiments of the present disclosure provide a fuse 100 including a housing 110, two guide slots 121 disposed outside the housing 110 and opposite to each other, and a temperature sensor 130 inserted into the two guide slots 121 and engaged with the housing 110. In this embodiment, two opposite side supporting portions 120 are integrally formed on the outer side of the housing 110, and two guide grooves 121 are correspondingly formed on the two side supporting portions 120. The two guide grooves 121 extend in a direction parallel to the axis of the housing 110, and the body portion 131 has a flat plate shape.

The temperature sensor 130 includes a body 131 and a sensor 132, wherein the body 131 is inserted into the two guide slots 121 and is clamped with the housing 110, and the sensor 132 is located on a side of the body 131 facing the housing 110 and is in contact with the housing 110.

The specific clamping structure of the temperature sensor 130 and the housing 110 is designed such that the housing 110 is provided with a first clamping portion 111 between the two guide grooves 121, and one side of the main body portion 131 facing the housing 110 is provided with a second clamping portion 133 clamped with the first clamping portion 111. The first engaging portion 111 is convex, and includes a first guiding inclined surface 111a, a first transition plane 111b, and a first engaging surface 111c, which are sequentially arranged along the insertion direction of the body portion 131. The second engaging portion 133 is convex, and includes a second engaging surface 133c, a second transition plane 133b, and a second guide slope 133a, which are sequentially arranged along the insertion direction of the body portion 131, and the second engaging surface 133c is opposite to the first engaging surface 111 c. Further, the end of the body portion 131 in the insertion direction is provided with two limiting protrusions 134, the two limiting protrusions 134 are limited outside the insertion ends 1210 of the two guide grooves 121, and protrude toward the opposite sides of the two guide grooves 121 in a one-to-one correspondence. The sensing element 132 is disposed between the second clamping portion 133 and the two limiting protrusions 134. This embodiment realizes the clamping of the main body part 131 with the housing 110 through the structural design of the first clamping part 111, the second clamping part 133 and the limiting protrusion 134, so that the main body part 131 cannot move in the two guide grooves 121 in the inserting direction and the extracting direction.

According to the embodiment of the application, the temperature sensor 130 can be firmly fixed on the outer side of the shell 110, and the temperature sensor 130 is not easy to shake or shift, so that the sensing element 132 can be reliably contacted with the shell 110, and the temperature of the surface of the shell 110 can be monitored in real time. When the temperature of the surface of the housing 110 exceeds the applicable working temperature range of the fuse, appropriate measures can be taken to effectively protect the normal operation of the fuse 100, thereby ensuring the safety of the circuit. With the embodiment of the present application, the operational reliability of the fuse 100 can be improved.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (14)

1. A fuse, comprising:

a housing;

two guide grooves which are arranged on the outer side of the shell and are oppositely arranged; and

the temperature sensor comprises a main body part and a sensitive element, wherein the main body part is inserted into the two guide grooves and clamped with the shell, and the sensitive element is positioned on one side of the main body part, which faces the shell, and is in contact with the shell.

2. The fuse of claim 1,

the casing is in be equipped with first joint portion between two guide slots, the orientation of main part one side of casing be equipped with the second joint portion of first joint portion joint.

3. The fuse of claim 2,

the tail end of the main body part along the insertion direction is provided with at least one limiting bulge, and the at least one limiting bulge is limited outside the insertion ends of the two guide grooves.

4. The fuse of claim 3,

the first clamping part is in a convex shape and comprises a first guide inclined plane, a first transition plane and a first clamping surface which are sequentially arranged along the insertion direction of the main body part;

the second joint portion is protruding form, includes the edge second joint face, second transition plane and the second direction inclined plane that the direction of insertion of main part set gradually, the second joint face with first joint face is relative.

5. The fuse of claim 3,

the sensitive element is arranged between the second clamping part and the at least one limiting bulge.

6. The fuse of claim 3,

the at least one limiting bulge comprises two limiting bulges, and the two limiting bulges correspondingly protrude towards the opposite sides of the two guide grooves one to one.

7. The fuse of claim 2,

first joint portion with one of them in the second joint portion is protruding form, first joint portion with another in the second joint portion be with protruding form matched with sunken form.

8. The fuse of claim 2,

the other ends of the two guide grooves, which are opposite to the insertion end, are closed ends.

9. The fuse of claim 1,

the main body part and the two guide grooves are detachably assembled in an interference manner.

10. The fuse of claim 1, comprising:

the two side supporting parts are arranged on the outer side of the shell and are oppositely arranged, and the two guide grooves are correspondingly arranged on the two side supporting parts one by one.

11. The fuse of claim 10,

the two side supporting parts and the shell are of an integrally formed structure.

12. The fuse of claim 1,

the two guide grooves extend in a direction parallel to the axis of the housing.

13. The fuse of claim 12,

the main body part is flat.

14. The fuse according to any one of claims 1 to 13,

the shape of the shell comprises a cylinder shape, a square shape or a cuboid shape.

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