CN213716802U - Thermal protector - Google Patents
Thermal protector Download PDFInfo
- Publication number
- CN213716802U CN213716802U CN202022837831.8U CN202022837831U CN213716802U CN 213716802 U CN213716802 U CN 213716802U CN 202022837831 U CN202022837831 U CN 202022837831U CN 213716802 U CN213716802 U CN 213716802U
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- Prior art keywords
- conductive
- boss
- groove
- thermal protector
- conductive shell
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- 230000001012 protector Effects 0.000 title claims abstract description 53
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 29
- 230000003068 static effect Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a thermal protector, which comprises a conductive shell, a conductive bottom plate and an insulating pad; the insulating pad is arranged between the conductive shell and the conductive bottom plate, the conductive shell is provided with fixing parts at two opposite sides, the insulating pad is provided with a abdicating hole, and the fixing parts clamp and fix the conductive bottom plate and the insulating pad in the conductive shell; the inner side of the conductive shell is provided with a reed, the fixed end of the reed is connected with the conductive shell, and the free end of the reed is provided with a movable contact; a stationary contact groove is formed in the inner side of the conductive bottom plate, a welding salient point and a stationary contact are arranged at the bottom of the stationary contact groove, and the stationary contact is connected with the welding salient point; the free end of the reed passes through the abdicating hole, so that the fixed contact is contacted with the movable contact. The stationary contact of the thermal protector is connected with the welding salient points, the stationary contact is replaced to be fixed with the conductive base plate in a riveting mode, the sealing performance of the thermal protector is enhanced, the problem that foreign matters leak to the inside of the thermal protector is avoided, and the safety and the stability of the work of the thermal protector are guaranteed.
Description
Technical Field
The utility model relates to a hot protector field especially relates to a hot protector.
Background
In the prior art, in order to enable equipment such as a transformer, a motor and the like to have insulating and moisture-proof functions, the equipment such as the transformer, the motor and the like needs to be subjected to paint dipping treatment. Thermal protectors arranged inside equipment such as transformers and motors will also come into contact with the insulating varnish.
At present, the stationary contact penetrates through the conductive base plate and is fixed on the conductive base plate in a riveting manner. In the dipping treatment process, the temperature of the insulating paint is higher, and the static contact and the conductive base plate are made of different metal materials, so that the expansion coefficients of the static contact and the conductive base plate are inconsistent. Deformation quantities of the static contact and the conductive base plate are inconsistent at high temperature, and a gap is formed between the static contact and the conductive base plate, so that insulating paint enters the thermal protector, the performance of the thermal protector is influenced, and the service life of the thermal protector is shortened; even because the interior space of thermal protector is completely filled with the insulating varnish, the thermal protector completely loses efficacy, causing potential safety hazard.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a thermal protector to solve above-mentioned problem.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a thermal protector, which comprises a conductive shell, a conductive bottom plate and an insulating pad; the insulating pad is arranged between the conductive shell and the conductive bottom plate, the conductive shell is provided with fixing parts at two opposite sides, the insulating pad is provided with a abdicating hole, and the fixing parts clamp and fix the conductive bottom plate and the insulating pad in the conductive shell;
a reed is arranged on the inner side of the conductive shell, the fixed end of the reed is connected with the conductive shell, and the free end of the reed is provided with a movable contact; a fixed contact groove is formed in the inner side of the conductive bottom plate, a welding salient point and a fixed contact are arranged at the bottom of the fixed contact groove, the fixed contact is connected with the welding salient point, and the fixed contact corresponds to the movable contact in position; and the free end of the reed penetrates through the abdicating hole, so that the fixed contact is contacted with the movable contact.
In the thermal protector, a first groove is also formed in the inner side of the conductive bottom plate; the fixed contact groove is arranged at the bottom of the first groove.
In the thermal protector, one surface of the static contact back to the welding salient point is flush with the groove bottom of the first groove.
In the thermal protector, a second groove is formed in the inner side of the conductive shell, and the second groove and the first groove enclose a containing cavity.
In the thermal protector, the second groove includes a fixing portion and a receiving portion; the fixed end of the reed is riveted with the bottom surface of the fixed part, and the free end of the reed extends into the accommodating part.
In the thermal protector, a first boss and a static contact boss are arranged on the outer side of the conductive base plate, and the static contact boss is positioned on the end face of the first boss; the static contact boss is provided with a welding concave point, and the welding concave point is located on the end face of the static contact boss.
In the thermal protector, the first boss is positioned between the two fixing parts, and the sum of the heights of the first boss and the stationary contact boss is less than or equal to the maximum distance from the fixing part to the conductive shell.
In the thermal protector, the first boss is located between the two fixing parts, at least one of the fixing parts is provided with a limiting concave part, and the limiting concave part is matched with the first boss.
In the thermal protector, the conductive shell is provided with a first wiring end, the conductive bottom plate is provided with a second wiring end, and the first wiring end and the second wiring end are arranged on the same side of the thermal protector.
In the thermal protector, a second boss is arranged on the outer side of the conductive shell, and the second boss is positioned on one surface of the outer side of the conductive shell; the junction of two lateral walls of second boss is provided with the oblique angle, the oblique angle sets up in the second boss and keeps away from one side of first wiring end.
Drawings
The accompanying drawings are provided to further illustrate the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
fig. 2 is a schematic structural diagram of the inner side of the conductive shell in one embodiment of the present invention;
fig. 3 is a schematic structural diagram of an outer side of the conductive base plate in one embodiment of the present invention;
fig. 4 is an exploded view of one embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of an embodiment of the present invention;
in the drawings: the conductive shell 1, the fixing part 11, the limiting concave part 111, the reed 12, the movable contact 121, the second groove 13, the second boss 14, the bevel 141, the first terminal 15, the conductive bottom plate 2, the fixed contact groove 21, the welding salient point 22, the fixed contact 23, the first groove 24, the first boss 25, the fixed contact boss 26, the welding concave point 27, the second terminal 28, the insulating pad 3 and the abdicating hole 31.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1, 2 and 4, the present invention discloses a thermal protector, which comprises a conductive housing 1, a conductive base plate 2 and an insulating pad 3; the insulating pad 3 is arranged between the conductive shell 1 and the conductive base plate 2, the conductive shell 1 is provided with fixing parts 11 at two opposite sides, the insulating pad 3 is provided with a yielding hole 31, and the fixing parts 11 clamp and fix the conductive base plate 2 and the insulating pad 3 in the conductive shell 1;
a reed 12 is arranged on the inner side of the conductive shell 1, the fixed end of the reed 12 is connected with the conductive shell 1, and the free end of the reed 12 is provided with a movable contact 121; a fixed contact groove 21 is formed in the inner side of the conductive bottom plate 2, a welding salient point 22 and a fixed contact 23 are arranged at the bottom of the fixed contact groove 21, the fixed contact 23 is connected with the welding salient point 22, and the fixed contact 23 corresponds to the movable contact 121; the free end of the spring 12 passes through the relief hole 31 to make the fixed contact 23 contact with the movable contact 121.
Specifically, the movable contact 121 is kept in contact with the stationary contact 23 in the normal state of the thermal protector. There are two modes of operation of the thermal protector: in the first condition, when the ambient temperature is too high, the spring 12 is deformed by heat, the movable contact 121 is separated from the fixed contact 23, and the circuit of the electric appliance is disconnected; in the second case, when the current flowing through the spring 12 is too large, the spring 12 itself is deformed by heat, and the movable contact 121 is separated from the fixed contact 23, thereby breaking the electric circuit.
The bottom of the static contact groove 21 is provided with a welding salient point 22, the static contact 23 is fixed on the inner side of the conductive base plate 2 by being connected with the welding salient point 22, the static contact 23 is replaced to be fixed with the conductive base plate 2 in a riveting mode, the conductive base plate 2 does not need to be provided with a through hole for riveting the static contact 23, and the sealing performance of the thermal protector is enhanced.
The insulation pad 3 is provided with a relief hole 31 so that the fixed contact 23 and the movable contact 121 can contact with each other to form a passage. When fixed part 11 and electrically conductive shell 1 cooperation centre gripping fixed conductive bottom plate 2 and insulating pad 3, form sealed space between electrically conductive shell 1, insulating pad 3 and the electrically conductive bottom plate 2, avoid the problem of foreign matter seepage to the inside of hot protector, avoided insulating varnish to permeate the problem of reed 12 and stationary contact 23, guaranteed the safety and the stability of hot protector work.
Further, a first groove 24 is further formed on the inner side of the conductive base plate 2; the stationary contact groove 21 is provided at the bottom of the first groove 24. The inner side of the conductive chassis 2 directs the electrical chassis 2 towards the side of the conductive housing 1. Set up the wobbling first recess 24 of holding reed 12 at electrically conductive bottom plate 2 for first recess 24 staggers the setting with the fixed part 11 of electrically conductive shell 1 on the thickness direction of hot protector, thereby has reduced the thickness of hot protector, makes the hot protector can miniaturize, has enlarged the range of application of hot protector, is particularly useful for arranging in narrow and small space.
Further, a surface of the stationary contact 23 facing away from the solder bump 22 is flush with the bottom of the first groove 24. The thickness of the static contact 23 is smaller than the depth of the static contact groove 21, so that the static contact 23 does not protrude out of the groove bottom of the first groove 24, the internal space of the thermal protector can be fully utilized, the space for the reed 12 to swing is larger, when the reed 12 deforms by heating, the swing amplitude of the reed 12 is larger, and the reed 12 can be ensured to be capable of completely breaking a circuit when deforming.
Preferably, the inner side of the conductive shell 1 is provided with a second groove 13, and the second groove 13 and the first groove 24 enclose an accommodating cavity. The inner side of the conductive shell 1 refers to the side of the conductive shell 1 facing the conductive base plate 2. The conductive base plate 2 is made of a thin-wall metal plate, the size is small, the conductive base plate 2 needs to be provided with the first groove 24 and the stationary contact groove 21, the stationary contact groove 21 is arranged at the bottom of the first groove 24, and due to the fact that metal ductility is limited, when the depths of the first groove 24 and the stationary contact groove 21 are too large, the thin-wall metal plate can break due to being too thin, and therefore the manufacturing difficulty of the conductive base plate 2 is high. In order to facilitate the universality and reduce the manufacturing difficulty of the conductive bottom plate 2, the utility model is provided with a second groove 13 at the inner side of the conductive shell 1, and the second groove 13 is matched with the first groove 24 to form an accommodating cavity for accommodating the swing of the reed 12; the arrangement of the second groove 13 can reduce the depth of the first groove 24 under the condition of keeping the space of the accommodating cavity unchanged, thereby reducing the manufacturing difficulty of the conductive bottom plate 2.
Specifically, the second recess 13 includes a fixing portion (not shown) and a receiving portion (not shown); the fixed end of the reed 12 is riveted with the bottom surface of the fixed part, and the free end of the reed 12 extends into the accommodating part. In a specific embodiment, the fixed end of the reed 12 is provided with two riveting holes, the fixed end is riveted on the fixed part through the riveting holes, and the free end of the reed 12 extends into the riveting holes; in addition, the reed 12 is connected with the conductive shell 1 by welding, and the welding point is positioned between the two riveting holes.
Referring to fig. 3, correspondingly, a first boss 25 and a stationary contact boss 26 are disposed on an outer side of the conductive base plate 2, and the stationary contact boss 26 is located on an end surface of the first boss 25; the stationary contact boss 26 is provided with a welding concave point 27, and the welding concave point 27 is located on the end face of the stationary contact boss 26. The outer side of the conductive base plate 2 guides the side of the conductive base plate 2 facing away from the conductive housing 1. Since the conductive base plate 2 is made of a thin-walled metal plate, and the inner side of the conductive base plate 2 is provided with the first groove 24 and the stationary contact groove 21, so that the inner side of the conductive base plate 2 is recessed to the outer side, the first boss 25 and the stationary contact boss 26 protruding from the outer side surface of the conductive base plate 2 are correspondingly formed on the outer side of the conductive base plate 2. Similarly, the stationary contact groove 21 is provided with a welding convex point 22 protruding from the bottom of the stationary contact groove 21, and a welding concave point 27 appears on the end surface of the stationary contact boss 26 on the other side.
When the stationary contact 23 is soldered to the soldering bump 22, the soldering dimple 27 is available for positioning; carrying out electric welding by taking the welding concave point 27 as a discharge point, melting the melting point position of the static contact 23, softening the melting point position, and gradually sinking towards the bottom of the first groove 24; and stopping electric welding when the surface of the static contact 23, which is opposite to the welding salient point 22, is flush with the groove bottom of the first groove 24. The contact position of the stationary contact 23 with the solder bump 22 is the melting point position of the stationary contact 23.
Referring to fig. 2 and 3, specifically, the first boss 25 is located between the two fixing portions 11. The conductive shell 1 is made of a thin-wall metal plate, and the fixing part 11 is formed by stamping and bending a folded edge of the thin-wall metal plate. When the first boss 25 is located between the two fixing portions 11, the fixing portions 11 do not need to clamp the first boss 25, so that the fixing portions 11 can be clamped and fixed more stably, and the thickness of the thermal protector can be reduced. In a specific embodiment, the sum of the heights of the first projection 25 and the stationary contact projection 26 is less than or equal to the maximum distance from the fixing portion 11 to the conductive housing 1.
Preferably, the first boss 25 is located between the two fixing portions 11, and at least one of the fixing portions 11 is provided with a limiting concave portion 111, and the limiting concave portion 111 is adapted to the first boss 25. The limiting concave part 111 is matched with the first boss 25 to limit the displacement of the conductive base plate 2, and the problem that the conductive base plate 2 and the conductive shell 1 slide relatively is avoided.
Specifically, the conductive housing 1 is provided with a first terminal 15, the conductive base plate 2 is provided with a second terminal 28, and the first terminal 15 and the second terminal 28 are disposed on the same side of the thermal protector. To ensure the circuit is completed, the conductive housing 1 and the conductive base plate 2 are respectively provided with a first terminal 15 and a second terminal 28, preferably, the first terminal 15 and the second terminal 28 are arranged on the same side of the thermal protector for facilitating the connection of the lines. To avoid the problem of the first terminal 15 and the second terminal interfering with other structures, the first terminal 15 and the second terminal 28 are disposed on the side close to the fixed end of the spring 12.
Correspondingly, a second boss 14 is arranged on the outer side of the conductive shell 1, and the second boss 14 is positioned on one surface of the outer side of the conductive shell 1; the junction of the two side walls of the second boss 14 is provided with an oblique angle 141, and the oblique angle 141 is arranged on the side of the second boss 14 far away from the first terminal 15. The outer side of the conductive shell 1 refers to the side of the conductive shell 1, which faces away from the conductive bottom plate 2. Similarly, the inner side of the conductive shell 1 is provided with a second groove 13, and the end surface of the outer side of the conductive shell 1 is correspondingly provided with a second boss 14. In order to miniaturize the thermal protector, a bevel 141 is provided at the junction of the two side walls of the second boss 14. In addition, the bevel 141 also increases the strength of the second boss 14.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive efforts, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A thermal protector, characterized by: comprises a conductive shell, a conductive bottom plate and an insulating pad; the insulating pad is arranged between the conductive shell and the conductive bottom plate, the conductive shell is provided with fixing parts at two opposite sides, the insulating pad is provided with a abdicating hole, and the fixing parts clamp and fix the conductive bottom plate and the insulating pad in the conductive shell;
a reed is arranged on the inner side of the conductive shell, the fixed end of the reed is connected with the conductive shell, and the free end of the reed is provided with a movable contact; a fixed contact groove is formed in the inner side of the conductive bottom plate, a welding salient point and a fixed contact are arranged at the bottom of the fixed contact groove, the fixed contact is connected with the welding salient point, and the fixed contact corresponds to the movable contact in position; and the free end of the reed penetrates through the abdicating hole, so that the fixed contact is contacted with the movable contact.
2. The thermal protector of claim 1, wherein: the inner side of the conductive bottom plate is also provided with a first groove; the fixed contact groove is arranged at the bottom of the first groove.
3. The thermal protector of claim 2, wherein: and one surface of the static contact back to the welding salient point is flush with the groove bottom of the first groove.
4. The thermal protector of claim 2, wherein: the inner side of the conductive shell is provided with a second groove, and the second groove and the first groove enclose a containing cavity.
5. The thermal protector of claim 4, wherein: the second groove comprises a fixing part and an accommodating part; the fixed end of the reed is riveted with the bottom surface of the fixed part, and the free end of the reed extends into the accommodating part.
6. The thermal protector of claim 1, wherein: a first boss and a static contact boss are arranged on the outer side of the conductive base plate, and the static contact boss is positioned on the end face of the first boss; the static contact boss is provided with a welding concave point, and the welding concave point is located on the end face of the static contact boss.
7. The thermal protector of claim 6, wherein: the first boss is located between the two fixing portions.
8. The thermal protector of claim 6, wherein: the first boss is located between the two fixing portions, at least one of the fixing portions is provided with a limiting concave portion, and the limiting concave portion is matched with the first boss.
9. The thermal protector of claim 1, wherein: the conductive shell is provided with a first wiring end, the conductive bottom plate is provided with a second wiring end, and the first wiring end and the second wiring end are arranged on the same side of the thermal protector.
10. The thermal protector of claim 9, wherein: a second boss is arranged on the outer side of the conductive shell and positioned on one surface of the outer side of the conductive shell; the junction of two lateral walls of second boss is provided with the oblique angle, the oblique angle sets up in the second boss and keeps away from one side of first wiring end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022837831.8U CN213716802U (en) | 2020-12-01 | 2020-12-01 | Thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022837831.8U CN213716802U (en) | 2020-12-01 | 2020-12-01 | Thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213716802U true CN213716802U (en) | 2021-07-16 |
Family
ID=76785917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022837831.8U Active CN213716802U (en) | 2020-12-01 | 2020-12-01 | Thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213716802U (en) |
-
2020
- 2020-12-01 CN CN202022837831.8U patent/CN213716802U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 528415 No. 3, shengfengxiang North Road, Xiaolan Town, Zhongshan City, Guangdong Province Patentee after: ZHONGSHAN CHUANCHENG PRECISION ELECTRONICS Co.,Ltd. Address before: 528415 one of Building 2, No.21, South Lianfeng Road, Xiaolan Town, Zhongshan City, Guangdong Province Patentee before: ZHONGSHAN CHUANCHENG PRECISION ELECTRONICS Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |