KR102209225B1 - Resistance heating type structure of shielding overcurrent - Google Patents

Abstract

The present invention relates to a method of manufacturing a resistance heating type overcurrent shielding structure, and more particularly, a fusible fuse member made of a fusible thread lead wire is mounted in a lengthwise direction in a resistance heating part heated by a resistance heating line, and resists by overcurrent. The present invention relates to a resistance heating type overcurrent shielding structure in which, when the heating part is heated above a set temperature value, the mounted usable threaded wire is disconnected to shield current.

Description

Resistance heating type structure of shielding overcurrent

The present invention relates to a method of manufacturing a resistance heating type overcurrent shielding structure, and more particularly, a fusible fuse member made of a fusible thread lead wire is mounted in a lengthwise direction in a resistance heating part heated by a resistance heating line, and resists by overcurrent. The present invention relates to a resistance heating type overcurrent shielding structure in which, when the heating part is heated above a set temperature value, the mounted usable threaded wire is disconnected to shield current.

In general, in the electrical circuit of an electronic device, a thermal fuse is installed at the power input terminal of the circuit to protect the power circuit to prevent electronic device failure caused by inrush current, internal temperature rise, and continuous overcurrent that occur when the power is turned on. Is done.

And, recently, a thermal fuse and a resistor are connected in a series structure, so that when an overcurrent of more than a set current is applied to the electric circuit, the thermal fuse is disconnected by the heat generated from the resistor, and the electric circuit is disconnected. ) Has been developed to ensure higher safety of electronic devices.

However, the conventional thermal fuse resistor has a problem in that the thermal fuse is disconnected due to factors other than heat generation of the resistor, such as melting due to an increase in the internal temperature of the electronic device.

In order to solve this problem, in Korean Patent Publication (A) No. 10-2007-0035752, a thermal fuse resistor in which a resistor and a thermal fuse are connected in series is accommodated in an alumina case, and then a thermal fuse resistor filled with silicate and magnesium oxide. It has been proposed, and in Korean Patent Publication (B1) No. 10-1038237, a thermal fuse resistor in which a resistor and a thermal fuse are connected in series and then spaced apart in a case has been proposed.

If the thermal fuse constituting the thermal fuse assembly is arranged in a standardized manner in the case, the shape of the thermal fuse assembly is maintained stably, and the thermal fuse is disconnected due to other factors other than the heat generation of the resistor during the manufacturing or assembly process. This can be resolved.

However, in the thermal fuse assembly, the thermal fuse and the resistor are separately manufactured, then assembled through soldering, etc., and then the thermal fuse and the resistor connected in series through soldering are housed in a separate molded case to form a single structure. The manufacturing process and parts cause a problem in that an excessive amount of additional costs is required for manufacturing.

In addition, the conventional thermal fuse assembly is structurally difficult to install in a small electronic device where space constraints occur because the volume of the thermal fuse and the resistor, and the case for accommodating them are large.

It is an object of the present invention conceived to solve the above problems, by mounting a fusible fuse member made of a fusible threaded wire in a lengthwise direction in a resistance heating portion heated by a resistance heating line, and a set temperature value of the resistance heating portion due to overcurrent When heated to the above, the available threaded wires mounted are disconnected and the current is shielded, thereby reducing manufacturing cost and achieving miniaturization and weight reduction.

In particular, it is intended to provide a resistance heating type overcurrent shielding structure in which an end of an available fuse member made of a usable threaded wire is stably connected to form a stable contact state, thereby ensuring improved operation and quality stability.

The above object is achieved by the following configuration provided in the present invention.

Resistance heating type overcurrent shielding structure according to the present invention,

A heat dissipation support pipe made of a ceramic material having a storage space in which at least one side of the access path is open; A resistance heating line wound around the outer wall of the heat dissipation support pipe; A lead terminal cap disposed on the other side of the heat dissipation support pipe and energized with the first end of the resistance heating line; A resistance heating unit including a first lead terminal protruding from an outer wall of the lead terminal cap,

An energization case mounted in the storage space of the heat dissipation support pipe along the access road and having a mounting space open on one side thereof; It is accommodated and mounted in the mounting space of the mounting case in the longitudinal direction, the first end is energized with the inner portion of the energization case, and the second end includes an available fuse unit including an available fuse member energized with the second lead terminal, wherein the The fusible fuse member is characterized in that it is composed of a fusible thread lead wire.

Preferably, the crimping contact pipe portion is formed to extend inside the energization case, and the first end of the usable threaded wire or the energizing piece soldered to the first end is inserted into the crimping contact pipe portion, and then condensed by crimping. It is configured to be crimped and fixed to the crimping contact tube portion and fixed to the inner portion of the energizing case in an energized state.

More preferably, an assembly groove of the annular assembly rim portion is integrally formed on one side of the energizing case, and the assembly groove of the annular assembly rim portion contacts the second end of the usable threaded wire mounted longitudinally in the mounting space of the energization case. A sealed molding part is formed to fix the second lead terminal forming the heat transfer structure and to close the mounting tool of the electric case.

In addition, a series insulation bush formed of a ceramic material on one side of the energizing case and having a mounting path communicating with the mounting space; A terminal cap assembly portion including a sealed terminal cap formed with a second lead terminal and a contact is added to close the mounting path by being disposed at the other end of the series insulation bush.

As described above, in the resistance heating type thermal fuse assembly according to the present invention, the usable fuse unit including the energization case in the resistance heating unit is formed in a concentric structure, and the usable fuse unit is disconnected by the heat dissipated from the resistance heating unit due to overcurrent. Thus, in configuring the circuit to be closed, the usable fuse member is composed of usable threaded wires to reduce manufacturing costs, and to ensure miniaturization and speed of shielding operation.

In particular, in the present invention, an end fixing structure is provided to formally fix a first end of a fusible fuse member made of a fusible thread lead on the inner side of the energization case.

Therefore, when the first end of the usable threaded wire mounted in the longitudinal direction on the energizing case by the end fixing structure is crimped and fixed by the crimping contact tube part, stable fixing and energization between the first end of the usable threaded wire and the inner part of the energizing case The state is formed and, as a result, has improved quality stability.

1 and 3 are an exploded state diagram and a cross-sectional configuration diagram showing the overall configuration of a resistance heating type overcurrent shielding structure proposed as a preferred embodiment in the present invention,
4 shows a detailed configuration of a energizing case in the resistance heating type overcurrent shielding structure proposed as a preferred embodiment in the present invention,
5 is a diagram sequentially showing a manufacturing process of a resistive heating type overcurrent shielding structure proposed as a more preferred embodiment in the present invention,
6 to 8 show a detailed configuration of a resistive heating type overcurrent shielding structure proposed as a more preferred embodiment in the present invention.

Hereinafter, a resistance heating type overcurrent shielding structure proposed as a preferred embodiment in the present invention will be described in detail with reference to the accompanying drawings.

1 and 3 are an exploded state diagram and a cross-sectional configuration diagram showing the overall configuration of a resistance heating type overcurrent shielding structure proposed as a preferred embodiment in the present invention, and FIG. 4 is a resistance heating proposed as a preferred embodiment in the present invention. In the type overcurrent shielding structure, the detailed configuration of the energization case is shown, and FIG. 5 sequentially shows the manufacturing process of the resistance heating type overcurrent shielding structure proposed as a more preferred embodiment in the present invention, and FIGS. 6 to 8 Shows a detailed configuration of a resistive heating type overcurrent shielding structure proposed as a more preferred embodiment in the present invention.

In the resistance heating type overcurrent shielding structure 1 proposed as a preferred embodiment in the present invention, the first lead terminal 13 and the second lead terminal 23 when reaching a temperature higher than the set temperature value due to heat generated by the overcurrent It is to prevent damage to the circuit due to overcurrent by disconnecting the circuit by disconnecting the space.

In the present embodiment, in order to secure a faster and more stable operation stability, a resistance heating structure that generates resistance heat by overcurrent and an available fuse structure that is disconnected by heat generated by the resistance heating are organically grafted.

Therefore, the present invention disposed on the circuit causes rapid resistance heating through the resistance heating structure when an overcurrent is applied, and the available fuse structure is disconnected by the resistance heat radiated from the resistance heating structure, and the circuit is quickly disconnected when an overcurrent is applied. Protect.

In particular, in the present invention, in implementing the resistance heating type overcurrent shielding structure in which the resistance heating structure and the usable fuse structure are organically grafted, the first lead terminal 13 and the second lead terminal 23 connecting circuits are in a line. It is composed of axial type aligned with.

Resistance heating type overcurrent shielding structures 1 and 1 ′ proposed as a preferred embodiment in the present invention have at least one open access road 11a as shown in FIGS. 1 to 3 and FIGS. 6 to 8. A heat dissipation support pipe 11 made of a ceramic material having a formed storage space 11b; A resistance heating line 12 wound around the outer wall of the heat dissipation support tube 11; A resistance heating unit 10 including a lead terminal cap 14 disposed on the other side of the heat dissipation support tube 11 to conduct electricity with the other end of the resistance heating line 12 and having a first lead terminal 13 formed on an outer wall thereof; It includes an available fuse unit 20 mounted in the receiving space 11b of the heat dissipation support tube 11 forming the resistance heating unit 10 to conduct electricity with the resistance heating line 12.

The heat dissipation support pipe 11 is made of a ceramic sintered molded product having excellent strength and insulation by compressing ceramic powder and forming a shape and then sintering through heat treatment, and the resistance heating wire 12 is formed of the heat dissipation support pipe 11. After being wound on the outer wall, it is molded through a molding resin to be fixed to the outer wall of the heat dissipation support pipe 11.

In addition, the usable fuse part 20 is mounted by entering into the storage space 11b of the heat dissipation support pipe 11 along the access road 11a in the longitudinal direction, and a mounting space 21a formed therein in the longitudinal direction. A hollow energization case 21; And a fusible fuse member 22 mounted in the longitudinal direction in the mounting space 21a of the energization case 21, one end being energized with the second lead terminal 23 and the other end energized with the energization case 21. do.

Here, the energization case 21 mounted in the storage space 11b of the heat dissipation support pipe 11 through the access path 11a of the heat dissipation support pipe 11 is a tubular shape obtained by pressing an energized metal plate such as drawing or burring. It is made of press-processed products.

"의 환형 조립림부(21d)를 형성한다.In this embodiment, at one end of the energizing case 21, a support jaw 21d-a supported in a stepped structure with one end of the heat dissipation support pipe 11, and an outer side of the support jaw 21d-a, Assembly groove (21d-b) formed integrally"

To form an annular assembly rim portion 21d of ".

"의 환형 조립림부(21d)를 형성하고 있으며, 이 또한 본 발명의 권리범위로 예정한다.In Figures 2b and 4b showing another embodiment, "configured to entirely surround the end of the heat dissipation support pipe 11"

The annular assembly rim portion 21d of "is formed, and this is also intended as the scope of the present invention.

Accordingly, the energization case 21 is inserted into the heat dissipation support pipe 11 through the mounting tool 21b.

"의 환형 조립림부(21d), 또는 "

"의 환형 조립림부(21d)의 지지턱(21d-a)에 의해 방열 지지관(11)의 일단에 단차구조로 지지되어서, 통전 케이스(21)는 방열 지지관(11)의 수납공간(11b) 내에 설정된 깊이로 삽입된다.At this time, as shown in Figures 2 and 8, the "

The annular assembly rim of "21d, or"

It is supported in a stepped structure at one end of the heat dissipation support pipe 11 by the support jaws 21d-a of the annular assembly rim part 21d of ", so that the energization case 21 is a storage space 11b of the heat dissipation support pipe 11 ) Is inserted at the set depth.

"의 환형 조립림부(21d)와 연결되어서, 통전 케이스(21)와 제 1 리드단자(13) 사이의 통전상태를 형성한다.In addition, the resistance heating wire 12 wound on the outer wall of the heat dissipation support pipe 11 has a first end 12a connected to the lead terminal cap 14 to conduct electricity with the first lead terminal 13, and the second end (12b) is formed in the energization case 21"

Is connected to the annular assembly rim portion 21d of "to form an energized state between the energizing case 21 and the first lead terminal 13.

Accordingly, the first lead terminal 13 fixed to the lead terminal cap 14 and the energization case 21 disposed in the heat dissipation support tube 11 are formed with a resistance heating line wound around the outer wall of the heat dissipation support tube 11 ( It is energized by the current applied through 12).

Meanwhile, a fusible fuse member 22 having a second lead terminal 23 and an energized state is mounted in the energization case 21 formed in an energized state with the first lead terminal 13, thereby preventing the application of overcurrent. Accordingly, when the resistance heating unit 10 is heated to a set temperature or higher, the usable fuse member 22 of the usable fuse unit 20 is disconnected so that the circuit is disconnected.

In particular, in this embodiment, the fusible fuse member 22 is formed of a fusible threaded wire having a thin diameter.

In addition, in adopting the usable threaded wire as the usable fuse member 22, in this embodiment, an insulating tube 24 is disposed in the mounting space 21a of the energization case 21 to form a concentric energization case. A stable energization state is formed between the fusible fuse member 22 made of the fusible thread lead wire.

That is, the usable threaded wire is always wrapped in the insulating tube 24, so that the usable threaded wire sticks to the inner wall of the mounting space 21a during the disconnection process or the operation process, thereby preventing the stability of operation from being impaired.

Here, the insulating tube 24 is made of plastic, urethane, ceramic, or the like.

More preferably, the insulating pipe 24 is filled with a flux (F) that increases the fluidity of the fusible lead wire, so that the hot-melted fusible lead wire is disconnected more quickly and stably by overheating.

According to this embodiment, the second end 22b of the usable threaded wire constituting the usable fuse member 22 is a preheated second lead terminal 23 or a sealed terminal cap as shown in FIGS. 2 and 8. 42) is joined through soldering.

In the process of soldering the second end (22b) of the usable solder wire to the preheated second lead terminal (23) or the sealed terminal cap (42), the second end (22b) of the usable solder wire is held in a short exposed state. Then, the short exposed second end (22b) is in close contact with the preheated second lead terminal (23) and the sealed terminal cap (42) and available to the second lead terminal (23) or the sealed terminal cap (42). The second end 22b of the fusible threaded wire is melted and joined.

Therefore, in the present embodiment, the second end 22b of the fusible lead wire constituting the fusible fuse member 22 can be formed to be bonded to the second lead terminal 23 or the sealed terminal cap 42 through solder bonding. have.

That is, when the second lead terminal 23 and the sealed terminal cap 42 are exposed to the outside, a stable soldering joint is possible with the second end 22b of the usable threaded lead wire that is held shortly.

However, it is practically difficult to bond the first end 22a of the usable threaded wire that needs to be bonded to the inner wall of the energizing case 21 by soldering to the inner wall of the energizing case 21.

That is, since the mounting space 21a of the energization case 21 is not exposed to the outside due to its characteristic having a set depth, the first end 22a of the usable threaded wire constituting the usable fuse member 22 is shortened. It is practically impossible to enter into the mounting space 21a of the energization case 21 in a pinched state and then melt-bond it through soldering.

For example, if the first end (22a) of the fusible lead wire with a thin diameter is exposed for a long time, bending of the fusible lead wire occurs when heating for soldering, and the first end (22a) of the fusible lead wire and the energizing case (21) are standardized soldering Bonding is difficult in reality.

In consideration of this, in the present invention, a fixing structure is provided to formally fix the first end of the usable threaded wire 22 having a thin diameter to the inner end of the energizing case 21 to form an available threaded wire. In mounting and disposing the made fusible fuse member 22 across the energization case 21, the first end 22a of the usable thread lead 22 is fixedly fixed to the inside of the energization case 21 to be connected.

That is, in this embodiment, the first end 22a of the usable threaded wire entering the energization case 21 in the longitudinal direction and the first end 22a of the usable threaded wire between the inner end of the energization case 21 are standardized. The first end 22a of the usable threaded wire 22 is fixed to the inner end of the energized case 21 through compression by providing a crimping fixing structure that is fixed to be fixed.

"형의 압착 접점관부(21c)를 연장되게 형성한다.To this end, in this embodiment, the inner part of the energization case 21 accommodated in the storage space 11b of the heat dissipation support pipe 11

The "type of crimping contact tube part 21c is formed to be extended.

According to this embodiment, the energizing case 21 including the crimping contact pipe portion 21c may be molded through a drawing process.

In addition, the inner end of the energization case 21 is integrally formed with a crimping contact tube part 21c having a relatively smaller diameter than the diameter of the mounting space 21a, so that the available thread lead having a thin diameter is a crimping contact tube part ( It is inserted through 21c) and then compressed to be fixed.

Therefore, as shown in Fig. 5, the first end 22a of the usable threaded wire that has entered the energization case 21 in the longitudinal direction is inserted into the crimping contact pipe part 21c, and then the crimping contact pipe part 21c is axially piped through crimping. , The first end 22a of the fusible lead wire 22, or the insulating tube 24 obtained by soldering the first end 22a of the fusible lead wire 22 is crimped to the crimp contact tube part 21c to be fixed. *** In Fig. 5b, the non-explanatory symbol "P" is a crimping member ***

When configured in this way, the first end 22a of the usable threaded wire 22 entering the mounting space 21a of the energization case 21 in the longitudinal direction is crimped and fixed by the crimping contact tube part 21c, Further, the second end 22b is joined to the second lead terminal 23 through soldering.

In addition, the mounting hole 21b of the open energization case 21 is closed in the assembly groove 21d-b of the annular assembly rim part 21d of the energization case 21 as shown in FIG. 2, and the energization case 21 A sealed molding part 30 is formed to fix the second lead terminal 23 connected to the second end 22b of the usable threaded wire mounted in the longitudinal direction to the end of the energizing case 21 in an insulating structure.

Accordingly, the second lead terminal 23 is fixedly fixed to one side of the energizing case 21 by the sealing molding part 30.

On the other hand, in a more preferred embodiment of the present invention, as shown in Figs. 6 to 8, the sealing molding part 30 is not formed on the mounting tool 21b of the energization case 21, and one side of the energization case 21 The second lead terminal 23 is directly connected to the annular assembly rim 21d by the terminal cap assembly portion 40 by adding a terminal cap assembly portion 40 to be assembled in an insulating structure.

Here, the terminal cap assembly portion 40 is made of a ceramic material, and a series insulation bush 41 having a mounting path 41a communicating with the mounting space 21a; It is disposed at the other end of the series insulation bush 41 to close the mounting path 41a, and includes a sealed terminal cap 42 that forms a contact with the second lead terminal 23.

The series insulation bush 41 according to this embodiment is inserted into the assembly groove 21d-b of the annular assembly rim 21d formed at one end of the energization case 21, and is assembled in series with the energization case 21 do.

When the terminal cap assembly portion 40 including the series assembly bush 41 and the sealed terminal cap 42 is formed as described above, the first lead terminal 13 and the second lead terminal 23 of the overcurrent shielding structure are sealed. It has improved quality stability through the standard assembly of the first lead terminal 13 and the second lead terminal 23 fixed through the terminal cap 42 and, as a result, aligned in the axial direction.

Therefore, in the present invention, the first end (22a) is stably fixed through the crimping contact tube part (21c) formed in the energizing case (21) of the usable threaded wire (22) constituting the usable fuse part (20) to form a contact point. And, a stable connection state with the second lead terminal 23 is formed through the sealed molding part 30 or the terminal cap assembly part 40.

In particular, if the terminal cap assembly portion 40 is further included as in the present invention, the first lead terminal 13 is fixedly assembled and fixed to the heat dissipation support pipe 11 through the lead terminal cap 14, and the second The lead terminal 23 is assembled and fixed in an insulating structure to one end of the energizing case 21 through the sealed terminal cap 42 so that improved durability and quality stability are ensured.

1. Resistance heating type overcurrent shielding structure
10. Resistance heating part 11. Heat dissipation support pipe
11a. Driveway 11b. Storage space
12. Resistance heating wire 12a. First end
12b. 2nd end 13. 1st lead terminal
14. Lead terminal cap
20. Usable fuse part 21. Electric case
21a. Mounting space 21b. Mounting
21c. Crimp contact pipe part
21d. Annular assembly rim
21d-a. Support jaw 21d-b. Assembly groove
22. Fusible fuse member 22a. First end
22b. 2nd end 23. 2nd lead terminal
24. Insulation tube
30. Sealed molding part
40. Terminal cap assembly 41. Series insulation bush
41a. Siljang-ro 42. Sealed terminal cap

Claims (4)

A heat dissipation support pipe made of ceramic material having a storage space in which at least one side of the access path is open; A resistance heating line wound around the outer wall of the heat dissipation support pipe; A lead terminal cap disposed on the other side of the heat dissipation support pipe and energized with the first end of the resistance heating line; A resistance heating unit including a first lead terminal protruding from an outer wall of the lead terminal cap,
A energization case mounted in the storage space of the heat dissipation support pipe along the access road and having a mounting space open on one side thereof; It is accommodated and mounted in the mounting space of the energization case in a longitudinal direction, and a first end includes an available fuse unit including an available fuse member that is energized with an inner portion of the energization case, and a second end thereof, the The fusible fuse member is composed of a fusible thread lead wire,
The crimping contact tube portion is formed to extend on the inner portion of the energization case,
Resistance heating, characterized in that the first end of the usable threaded wire is inserted into the crimping contact tube part, and then crimped and fixed to the crimping contact tube part axially axially axially compressed through a crimping member, and fixed to the inner part of the energizing case in an energized state. Type overcurrent shielding structure. delete The method of claim 1, wherein an assembly groove of the annular assembly rim part is integrally formed in one side of the energization case, and the assembly groove of the annular assembly rim part has a second end of an available thread lead wire mounted longitudinally in the mounting space of the energization case. A resistance heating type overcurrent shielding structure, characterized in that the second lead terminal forming the contact is fixed in a heat transfer structure, and a sealed molding part is formed to close the mounting tool of the current case. According to claim 1, wherein one side of the energization case is made of a ceramic material, and a series insulation bush formed with a mounting path communicating with the mounting space; A resistance heating type overcurrent shielding structure, characterized in that a terminal cap assembly portion including a sealed terminal cap having a second lead terminal and a contact formed thereon is added to close the mounting path by being disposed at the other end of the series insulation bush.

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