CN2586278Y - A protective structure for surface mount components with additional fuses - Google Patents

Abstract

A protective structure of surface mount component with fuse is used to protect the circuit where it is located, so that it can not be burnt out due to circuit overload, in which, the surface mount component is a shell made of insulating material, its inner cavity has a first circuit (sub) component body and a second circuit (sub) component body, the two end faces of the shell are welded with electrode terminals, its main character lies in: a metal fuse is connected between the first circuit (sub) assembly body and the second circuit (sub) assembly body, wherein the metal fuse is attached to the upper end face of the shell and penetrates into the inner cavity of the shell to be electrically connected with the first circuit (sub) assembly body and the second circuit (sub) assembly body in a series or parallel mode.

Description

A protective structure for surface mount components with additional fuses

technical field

The utility model relates to a surface adhesive component, in particular to a protective structure of a surface adhesive component with an additional fuse.

Background technique

Recently, surface mount components (SMD) have been applied more and more widely. Safety protection components are devices used to protect circuits from overvoltage, overcurrent and surge damage.

Currently commercially available monolithic surface mount component product 10 has a structure as shown in FIG. Electrode terminals 15 are welded. This kind of surface mount component has no fuse design. When the circuit is overloaded, it is very likely to burn due to overheating or the insulation layer catches fire.

Contents of the invention

Therefore the utility model person in view of this, through the invention of the utility model after continuous research test.

The utility model provides an invention in which a metal fuse (temperature fuse or other protective circuit) is applied to a surface-mounted component, so that the circuit component can be prevented from being burned due to circuit overload.

The purpose of the utility model is to provide a safety protection measure for safety protection components.

In order to achieve the above purpose of this utility model, this utility model proposes a protective structure for additional fuse surface adhesive components to protect the circuit component body where it is located so that it will not be burned due to circuit overload. The component is an outer shell made of insulating material, and its inner cavity has a first circuit (sub) component body and a second circuit (sub) component body. The two ends of the shell are welded with electrode terminals. Its main features are: : a metal fuse is connected between the first circuit (sub)component body and the second circuit (sub)component body, wherein the metal fuse is attached to the upper end surface of the housing and penetrates into the inner cavity of the housing, It is electrically connected with the first circuit (sub)component body and the second circuit (sub)component body in series or in parallel.

For further illustrating purpose, feature and effect of the present utility model, by following specific embodiment, and cooperate accompanying drawing, the present utility model is explained in detail, and explanation is as follows:

Description of drawings

FIG. 1 shows the structure of a known monolithic surface mount component.

FIG. 2 is a perspective view of the appearance of the surface mount assembly of the serial insurance type additional fuse according to the first embodiment of the present invention.

Fig. 3 is a sectional view along AA' of the fuse surface mount assembly shown in Fig. 2 .

FIG. 4 is a perspective view of the appearance of the surface mount assembly of the parallel safety type additional fuse according to the second embodiment of the present invention.

Fig. 5A is a cross-sectional view along BB' of the fuse surface mount assembly shown in Fig. 4 .

Fig. 5B is a cross-sectional view of the fuse surface mount assembly shown in Fig. 4 along CC'.

FIG. 6 is a cross-sectional view of the surface mount assembly of the additional fuse according to the third embodiment of the present invention. in the picture

10 surface mount components

11 Shell

13 Circuit assembly body

15 electrode terminal

20 surface mount components

21 Shell

25 electrode terminals

27 metal fuse

29a The first circuit assembly body

29b Second circuit assembly body

40 surface mount components

41 shell

45a electrode terminal

451a fuse link

45b Electrode terminal

451b fuse link

47a First metal fuse

47b Second metal fuse

455a circuit assembly body connecting part

455b circuit assembly body connecting part

49a The first circuit assembly body

49b Second circuit assembly body

60 surface mount components

61 Shell

65a First electrode terminal

65b Second electrode terminal

67a First metal fuse

67b Second metal fuse

69 circuit assembly body

Detailed ways

In order to fully illustrate the utility model, hereby cooperate with accompanying drawing to describe in detail as follows. (The circuit component body referred to below is regarded as the electronic component body)

FIG. 2 is a perspective view of the appearance of the surface mount component of the serial insurance type additional fuse according to the first embodiment of the present invention. The utility model provides a protection structure for an additional fuse surface-mounted component, which is used to protect the circuit component body where it is located, so that it will not cause a fire due to circuit overload and burnt out, wherein the surface-mounted component 20 is made of an insulating material The housing 21 has a first circuit assembly body and a second circuit assembly body (see FIG. 3 ) in its cavity, and electrode terminals 25 are welded on both ends of the housing 21 . A metal fuse 27 is connected between the first circuit assembly body and the second circuit assembly body, which is attached to the upper end surface of the housing 21 and penetrates into the inner cavity of the housing 21 to connect with the first circuit assembly body and the second circuit assembly body. The two circuit component bodies are electrically connected in series.

Fig. 3 is a cross-sectional view along AA' of the surface mount assembly of the series-secured additional fuse shown in Fig. 2 . FIG. 3 is used to more clearly show the spatial relationship among the structures in FIG. 2 . The housing 21 of the surface mount component 20 has an inner cavity divided into two parts, and a first circuit component body 29 a and a second circuit component body 29 b are installed respectively. Both ends of the casing 21 are welded with electrode terminals 25, which are U-shaped sheet metals, one end of which is electrically connected to a circuit component body, and the other end is concavely folded and attached to the bottom of the casing 21 as a welding point. A metal fuse 27 is connected between the first circuit assembly body 29a and the second circuit assembly body 29b, which is attached to the outside of the housing 21 and penetrates into the inner cavity of the housing 21 to connect with the first circuit assembly body 29a and the second circuit assembly body 29a. The component bodies 29b are electrically connected in series.

The material of the housing 21 can be insulating materials such as silica gel, Teflon, Bakelite, resin, plastic, and the like.

Wherein, the electrode terminal 25 may be a tin-plated metal terminal.

Wherein the first circuit component body 29 a and the second circuit component body 29 b may be different types of circuit component bodies. Here are examples as follows, example one: the first circuit assembly body 29a and the second circuit assembly body 29b can be piezoresistors; example two, the first circuit assembly body 29a can be a piezoresistor, and the second circuit assembly body 29b can be a piezoresistor Thermistor; Example 3, both the first circuit assembly body 29a and the second circuit assembly body 29b can be thermistors; Example 4, the first circuit assembly body 29a and the second circuit assembly body 29b are capacitor assembly bodies.

4 is a perspective view of the appearance of the surface mount component of the parallel safety type additional fuse according to the second embodiment of the present invention. The surface mount assembly 40 includes a shell 41 made of insulating material, the inner cavity of which has a first circuit assembly body and a second circuit assembly body (see Figure 5A and Figure 5B), and electrodes are welded on both ends of the shell 41. terminal 45a and electrode terminal 45b. The electrode terminal 45a includes a fuse connection portion 451a and a circuit component body connection portion 455a. The fuse connecting portion 451a is directly connected to the first metal fuse 47a on the upper surface of the housing 41 ; the circuit component body connecting portion 455a penetrates into the housing 41 and is electrically connected to the first circuit component body. The electrode terminal 45b includes a fuse connecting portion 451b and a circuit unit body connecting portion 455b. The fuse connecting portion 451b is directly connected to the second metal fuse 47b on the upper surface of the casing 41 ; the circuit assembly body connecting portion 455b penetrates the casing 41 and is electrically connected to the second circuit assembly body.

Fig. 5A is a cross-sectional view along BB' of the surface mount assembly of the additional fuse shown in Fig. 4 . Fig. 5B is a cross-sectional view along CC' of the surface mount assembly of the add-on fuse shown in Fig. 4 . As shown in FIG. 5A , the inner cavity of the shell 41 of the surface mount component 40 is divided into two parts, and a first circuit component body 49 a and a second circuit component body 49 b are installed respectively. Electrode terminals 45 a and electrode terminals 45 b are respectively welded to both end surfaces of the housing 41 . As shown in Figure 5A, the electrode terminal 45a includes a fuse connecting portion 451a and a circuit assembly body connecting portion 455a, wherein the fuse connecting portion 451a is longer, and one end thereof is electrically connected to the metal fuse 47a on the top surface of the housing 41, and the other is One end is concavely folded and attached to the bottom of the housing 41; the connecting part 455a of the circuit component body is relatively short, one end is electrically connected with the first circuit component body 49a in the cavity of the housing 41, and the other end is concavely folded and attached to the shell Body 41 below is used as welding point. As shown in Figure 5B, the electrode terminal 45b includes a fuse connecting portion 451b and a circuit assembly body connecting portion 455b, wherein the fuse connecting portion 451b is relatively long, and one end thereof is electrically connected to the metal fuse 47b on the top surface of the casing 41, and the other is One end is concavely folded and attached to the bottom of the housing 41 as a welding point; the connecting part 455b of the circuit component body is relatively short, one end is electrically connected with the second circuit component body 49b in the cavity of the housing 41, and the other end is concavely folded and pasted. Attached to the bottom of the housing 41 as a welding point.

The first circuit component 49a and the second circuit component body 49b can be the same or different types of circuit component bodies. Here are examples as follows: example one, the first circuit assembly body 49a and the second circuit assembly body 49b can be piezoresistors; example two, the first circuit assembly body 49a and the second circuit assembly body 49b can be thermistors Example three, the first circuit assembly body 49a can be a thermistor, and the second circuit assembly body 49b can be a capacitor assembly body; example four, the first circuit assembly body 49a and the second circuit assembly body 49b can be capacitors Component body; Example 5, the first circuit component body 49a can be a piezoresistor, and the second circuit component body can be a capacitor component body.

6 is a cross-sectional view of the surface mount component of the additional fuse according to the third embodiment of the present invention. The surface mount assembly 60 includes a housing 61 made of insulating material, the inner cavity of which has a circuit assembly body 69, and the two ends of the housing 61 are respectively welded with a first electrode terminal 65a and a second electrode terminal 65b. The surface mount assembly 60 A metal fuse 67 is electrically connected between the circuit assembly body 69 and the second electrode terminal 65b, one end of the first electrode terminal 65a is folded and attached to the bottom of the housing 61 as a welding point, and the other end is connected to the circuit The component body 69 is electrically connected. One end of the second electrode terminal 65b is also folded and attached to the bottom of the housing 61 as a welding point.

Although the utility model has been disclosed as above with several preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art may make various modifications without departing from the spirit and scope of the utility model. Moving and retouching, all the various changes and retouching done are all within the patent application scope of the present utility model.

Claims (3)

1. the safeguard structure of the surface sticking assembly of an Insurance riders silk; circuit in order to protection assembly place; make its not reason circuit g-load and burning; wherein this surface sticking assembly comprises the shell body that an insulation material is made; its inner chamber has one first a circuit unit body and a second circuit component body; these housing both ends of the surface also are welded with electrode terminal, it is characterized in that:

Connect a metal fuse (Thermal Cutoffs) between this first circuit unit body and this second circuit component body, wherein this metal fuse is attached in this housing upper surface groove, its two ends also penetrate this housing inner chamber by the perforation on this housing, these metal fuse two ends respectively with this first circuit unit body and this second circuit component body electrically connect, make this metal fuse with the series system electrically connect.

2. the safeguard structure of the surface sticking assembly of an Insurance riders silk; circuit in order to protection assembly place; make its not reason circuit g-load and burning; wherein this surface sticking assembly comprises the shell body that an insulation material is made; its inner chamber has one first a circuit unit body and a second circuit component body; these housing both ends of the surface also are welded with first electrode terminal and second electrode terminal respectively, it is characterized in that:

This first electrode terminal comprises the first fuse linking part and the first circuit unit body linking part, wherein this first fuse linking part directly links in this housing upper surface and this first metal fuse, this first circuit unit body linking part then penetrates this housing, with this first circuit unit body electrically connect;

Second electrode terminal comprises the second fuse linking part and second circuit component body linking part, wherein this second fuse linking part directly links in this housing upper surface and this second metal fuse, this second circuit component body linking part then penetrates this housing, with this second circuit component body electrically connect;

It comprises first metal fuse and second metal fuse, this first metal fuse and this second metal fuse are listed in this housing upper surface groove, one end of this first metal fuse penetrates this housing, and with this first circuit unit body electrically connect, its other end then with this first fuse linking part electrically connect, one end of this second metal fuse penetrates this housing, and with this second circuit component body electrically connect, its other end is the use in parallel with this second fuse linking part electrically connect then.

3. the safeguard structure of the surface sticking assembly of an Insurance riders silk; circuit in order to protection assembly place; make its not reason circuit g-load and burning; wherein this surface sticking assembly comprises the shell body that an insulation material is made; its inner chamber has a circuit unit body; these housing both ends of the surface also are welded with first electrode terminal and second electrode terminal respectively, it is characterized in that:

It comprises a metal fuse, its be electrically connected at this circuit unit body and this second electrode terminal between, the recessed folding of this first electrode terminal one end is attached at this housing below as pad, its other end then with this circuit unit body electrically connect;

Wherein the recessed folding of this second electrode terminal one end is attached at this housing below as pad, and its other end then links with this metal fuse.

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