CN217215375U - Plug with overheat protection function - Google Patents
Plug with overheat protection function Download PDFInfo
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- CN217215375U CN217215375U CN202122958272.0U CN202122958272U CN217215375U CN 217215375 U CN217215375 U CN 217215375U CN 202122958272 U CN202122958272 U CN 202122958272U CN 217215375 U CN217215375 U CN 217215375U
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- joint
- plug
- movable contact
- overheat protection
- connecting terminal
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Abstract
The utility model discloses a plug with overheat protection function, which comprises an insulating shell, a first power line and a first joint, wherein the first power line and the first joint extend into the insulating shell; the support piece is embedded in the protective shell and is attached to the first connector; the connecting terminal is arranged opposite to the first joint, and the exposed end of the connecting terminal is electrically connected with the first power line; a movable contact spring and a bimetallic strip are arranged in the closed space, one end of the movable contact spring and one end of the bimetallic strip are attached to each other and fixedly connected with the extending end of the first joint, and the bimetallic strip is positioned below the movable contact spring; when the temperature is lower than the action value, the movable contact piece is contacted with the connecting terminal; when the temperature is higher than the action value, the movable contact piece is disconnected with the connecting terminal. The plug is simple in structure and high in sensitivity, and effectively solves the problem that safety accidents are caused by overheating under the condition of long-term electrification or overlarge load.
Description
Technical Field
The utility model belongs to the technical field of power plug, especially, relate to a plug with overheat protection function.
Background
A power plug is one of electrical wiring tools, and is a connection tool that is provided at an end of a power cable connected to an electrical appliance and is used by being inserted into a socket. In general, electric power supplied to a home or a factory is connected to an electric outlet, and a plug of an electric appliance is inserted into the electric outlet to supply electric power to the electric appliance to operate the electric appliance.
The plug is easy to generate heat under the condition of long-term power-on or overload, fire can be caused under the serious condition, and although the plug which can automatically cut off power under the condition of overhigh temperature exists in the market, certain improvement spaces still exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can solve the plug of above-mentioned problem.
In order to achieve the above object, an embodiment of the present invention provides a plug with overheat protection function, including the insulating casing, stretch into first power cord and first joint in the insulating casing, be connected with the overheat protection structure between first power cord and the first joint, the overheat protection structure includes:
the protective shell is internally provided with a first joint, and one end of the first joint extends into the protective shell;
the supporting piece is embedded in the protective shell and attached to the first joint, so that a closed space is formed in the protective shell; and
the connecting terminal is arranged opposite to the first joint and extends into the closed space from the outer side of the supporting piece, and the exposed end of the connecting terminal is electrically connected with a first power line;
a movable contact spring and a bimetallic strip are arranged in the closed space, wherein one end of the movable contact spring and one end of the bimetallic strip are attached to each other and fixedly connected with the extending end of the first joint, and the bimetallic strip is positioned below the movable contact spring and is contacted with the supporting piece; the bimetallic strip has an action value, and when the temperature is lower than the action value, the movable contact strip is contacted with the connecting terminal; when the temperature is higher than the action value, the bimetallic strip is heated and bent upwards, so that the movable contact piece is disconnected with the connecting terminal.
Optionally, the support member includes first step, second step and third step that descends from left to right step by step, the mouth has been seted up to the lateral wall of first step, the mouth face the second step direction extends and forms the trench, connecting terminal follows the mouth stretches into on the trench and fix on the mouth, the end of stretching into of first joint hugs closely on the third step.
Optionally, be equipped with first toper piece on the third step, first toper piece is located the second step with between the first joint, bimetallic strip includes first installation department and arc portion, first installation department fixed connection be in the end of stretching into of first joint, the arc portion for first installation department downward sloping and being close to the lateral wall of second step, work as the temperature is less than the action value, the bottom of arc portion with first toper piece contact.
Optionally, the movable contact piece includes a second mounting portion, a stressed portion and a connecting portion, the second mounting portion is fixed on the first mounting portion, the stressed portion is inclined upward relative to the second mounting portion, two ends of the stressed portion are respectively connected with the second mounting portion and the connecting portion, and the connecting portion extends to the upper portion of the connecting terminal.
Optionally, the bottom of the connecting portion is provided with a second tapered block, when the temperature is lower than the action value, the second tapered block abuts against the slope of the arc-shaped portion away from the first mounting portion, and when the temperature is higher than the action value, the arc-shaped portion bends and the force-bearing portion inclines upwards by pushing the second tapered block.
Optionally, when the temperature is lower than the action value, the arc portion abuts on the arc portion.
Optionally, a silver contact piece is installed on the extending end of the connecting terminal, and a connecting block capable of contacting with the silver contact piece is arranged on the connecting portion.
Optionally, the protective housing is provided with a first opening and a second opening which are oppositely arranged, the first opening is matched with the first step, and the thickness of the third step and the extending end of the first joint is the same as the height of the second opening.
Optionally, still include pilot lamp, second power cord and second joint, the pilot lamp is installed on the outer wall of insulating casing, two terminals of pilot lamp stretch into in the insulating casing and connect respectively connecting terminal with on the second joint, the second power cord with the second joint is connected.
Compared with the prior art, the beneficial effects of the utility model are that: the movable contact piece and the bimetallic strip are arranged in the closed space, so that the temperature is prevented from losing, the bimetallic strip senses the temperature more accurately, and the switching accuracy is improved; the plug is simple in structure and high in sensitivity, and effectively solves the problem that safety accidents are caused by overheating under the condition of long-term electrification or overlarge load.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is the structure schematic diagram of the utility model after the insulating shell is hidden.
Fig. 2 is a top view of an overheat protection structure.
Fig. 3 is a sectional view of the area a-a as shown in fig. 2.
Fig. 4 is a schematic structural view of the hidden protective shell of the overheat protection structure.
Fig. 5 is a schematic structural view of the supporting member.
Fig. 6 is a schematic view of the connection between the bimetal and the movable contact.
Fig. 7 is a schematic structural view of the protective shell.
FIG. 8 is a schematic structural view of the present invention
In the figure: the overheat protection device comprises an insulating shell 1, a first power line 2, a first joint 3, an overheat protection structure 4, a protective shell 41, a first opening 411, a second opening 412, a supporting piece 42, a first step 421, a second step 422, a third step 423, a first conical block 4231, a port 424, a groove 425, a connecting terminal 43, a movable contact piece 44, a second mounting portion 441, a force receiving portion 442, a connecting portion 443, a second conical block 4431, a connecting block 4432, a bimetallic strip 45, a first mounting portion 451, an arc-shaped portion 452, a silver contact piece 5, an indicator light 6, a second power line 7 and a second joint 8.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be understood that, if directional indications, such as directions or positional relationships indicated by upper, lower, left, right, front, back, inner, outer, etc., are provided in the embodiments of the present invention, the directions or positional relationships are shown in the drawings, which are only for convenience of description and simplification of the embodiments of the present invention, and are not intended to indicate or imply that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like shall be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrated. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-8, the embodiment of the utility model provides a plug with overheat protection function, including insulating casing 1, stretch into first power cord 2 and first joint 3 in the insulating casing 1, be connected with overheat protection structure 4 between first power cord 2 and the first joint 3, overheat protection structure 4 includes:
a protective shell 41 into which one end of the first joint 3 extends;
a support member 42 embedded in the protective shell and attached to the first joint, so that a closed space is formed in the protective shell 41; and
the connecting terminal 43 is arranged opposite to the first connector 3, and extends into the closed space from the outer side of the supporting piece 42, and the exposed end of the connecting terminal 43 is electrically connected with the first power line 2;
a movable contact spring 44 and a bimetallic strip 45 are arranged in the closed space, wherein one end of the movable contact spring 44 is attached to one end of the bimetallic strip 45 and is fixedly connected with the extending end of the first connector 3, and the bimetallic strip 45 is positioned below the movable contact spring 44 and is in contact with the supporting piece 42; when the temperature is lower than the action value, the movable contact piece 44 is contacted with the connecting terminal 43; the bimetal 45 has an action value, which refers to a temperature critical value of the bimetal 45 when being heated and bent, namely a thermal expansion coefficient; when the temperature is higher than the action value, the bimetallic strip 45 is heated and bent upwards, so that the movable contact piece 44 is disconnected with the connecting terminal 43; the protective shell 41 and the supporting piece 42 are made of insulating materials; preferably, the movable contact piece 44 and the bimetallic strip 45 are installed in the closed space, so that heat dissipation can be effectively prevented, the temperature sensed by the bimetallic strip 45 is more accurate, and the switching accuracy is improved; the plug is simple in structure and high in sensitivity, and effectively solves the problem that safety accidents are caused by overheating under the condition of long-term electrification or overlarge load.
In this embodiment, in order to form a closed space in the protective casing 41 without affecting the overheat protection, specifically, the supporting component 42 includes a first step 421, a second step 422, and a third step 423 that decrease gradually from left to right to form the closed space; an opening 424 is formed in a side wall of the first step 421, and the opening 424 extends towards the second step 421 to form a slot 425; the connecting terminal 43 extends into the slot 425 from the opening 424 and is fixed on the opening 424 to be tightly closed; the extending end of the first joint 3 is tightly attached to the third step 423.
In this embodiment, be equipped with first toper piece 4231 on the third step 423, first toper piece 4231 is located second step 422 with between the first joint 3, bimetallic strip 45 includes first installation department 451 and arc portion 452, first installation department 451 fixed connection be in the end that stretches out of first joint 3, arc portion 452 for first installation department 451 downward sloping and being close to the lateral wall of second step 422, when the temperature is less than the action value, the bottom of arc portion 452 with the contact of first toper piece 4231, through first toper piece 4231 can be right bimetallic strip 45 carries out spacing and support, and the downwarping when preventing it from reseing influences subsequent use.
In this embodiment, in order to realize that the bimetal 45 can better jack up the movable contact piece 44, specifically, the movable contact piece 44 includes a second mounting portion 441, a force receiving portion 442 and a connecting portion 443, wherein the second mounting portion 441 is fixed on the first mounting portion 451, the force receiving portion 442 inclines upward relative to the second mounting portion 441, and two ends of the force receiving portion 441 are respectively connected to the second mounting portion 441 and the connecting portion 443, so that the force receiving portion 441 and the connecting portion 443 can have a resilient force, and the connecting portion 443 extends to a position above the connecting terminal 43.
Specifically, the bottom of the connecting portion 443 is provided with a second taper piece 4431, when the temperature is lower than the action value, the second taper piece 4431 abuts on the slope of the arc-shaped portion 452 away from the first mounting portion 451, and when the temperature is higher than the action value, the arc-shaped portion 452 bends and the force receiving portion 442 is inclined upward by pushing the second taper piece 4431; the accuracy of the bimetal 45 pushing the movable contact 44 can be effectively improved by the second taper block 4431.
In this embodiment, when the temperature is lower than the operation value, the connection portion 443 abuts against the arc-shaped portion 452, and specifically, the connection portion 443 is positioned between the second taper block 4431 and the second mounting portion 441 and abuts against the top end of the arc-shaped portion 452, so as to support the movable contact 44 and improve the stability thereof.
In this embodiment, the extending end of the connection terminal 43 is mounted with a silver contact piece 5, and the connection portion 443 is provided with a connection block 4432 capable of contacting with the silver contact piece 5. The silver contact piece 5 is provided to prevent instantaneous heat and spark from being generated at the moment the connection terminal 43 is in contact with the connection block 4432, oxidation and electrolysis are generated, and the service life is affected.
In this embodiment, in order to realize that the supporting member 42 and the first joint 3 can be embedded in the protective shell 41, specifically, the protective shell 41 is provided with a first opening 411 and a second opening 412 which are oppositely arranged, wherein the first opening 411 is adapted to the first step 421, and the thickness of the third step 423 and the extending end of the first joint 3 is the same as the height of the second opening 412.
In this embodiment, the plug further includes an indicator lamp 6, a second power line 7 and a second connector 8, the indicator lamp 6 is installed on an outer wall of the insulating housing 1, two connection wires of the indicator lamp 6 extend into the insulating housing 1 and are respectively connected to the connection terminal 43 and the second connector 8, the second power line 7 is electrically connected to the second connector 8, when the temperature is higher than the action value, the connection terminal 43 is disconnected from the movable contact 44, the indicator lamp 8 is turned off, otherwise, the indicator lamp is turned on, so that a user can clearly know the use condition of the plug.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A plug with an overheat protection function comprises an insulating shell, a first power line and a first joint, wherein the first power line and the first joint extend into the insulating shell, an overheat protection structure is connected between the first power line and the first joint, and the overheat protection structure comprises:
the protective shell is internally provided with a first joint, and one end of the first joint extends into the protective shell;
the supporting piece is embedded in the protective shell and attached to the first joint, so that a closed space is formed in the protective shell; and
the connecting terminal is arranged opposite to the first joint and extends into the closed space from the outer side of the supporting piece, and the exposed end of the connecting terminal is electrically connected with a first power line;
a movable contact spring and a bimetallic strip are arranged in the closed space, wherein one end of the movable contact spring and one end of the bimetallic strip are attached to each other and fixedly connected with the extending end of the first joint, and the bimetallic strip is positioned below the movable contact spring and is contacted with the supporting piece; the bimetallic strip has an action value, and when the temperature is lower than the action value, the movable contact strip is contacted with the connecting terminal; when the temperature is higher than the action value, the bimetallic strip is heated and bent upwards, so that the movable contact piece is disconnected with the connecting terminal.
2. The plug according to claim 1, wherein the supporting member comprises a first step, a second step and a third step which decrease gradually from left to right, a side wall of the first step is provided with a port, the port extends in a direction facing the second step to form a slot, the connecting terminal extends into the slot from the port and is fixed on the port, and an extending end of the first connector is tightly attached to the third step.
3. The plug with the overheat protection function according to claim 2, wherein a first tapered block is arranged on the third step, the first tapered block is located between the second step and the first joint, the bimetallic strip comprises a first installation portion and an arc portion, the first installation portion is fixedly connected to an extending end of the first joint, the arc portion is inclined downwards relative to the first installation portion and close to a side wall of the second step, and when the temperature is lower than the action value, the bottom of the arc portion is in contact with the first tapered block.
4. A plug having an overheat protection function according to claim 3, wherein the movable contact piece includes a second mounting portion, a force receiving portion and a connecting portion, the second mounting portion is fixed to the first mounting portion, the force receiving portion is inclined upward with respect to the second mounting portion, and both ends of the force receiving portion are connected to the second mounting portion and the connecting portion, respectively, the connecting portion extends above the connecting terminal.
5. The plug with the overheat protection function according to claim 4, wherein the bottom of the connecting portion is provided with a second tapered block which abuts on a slope of the arc portion away from the first mounting portion when the temperature is lower than the action value, and when the temperature is higher than the action value, the arc portion is bent and the force receiving portion is inclined upward by pushing the second tapered block.
6. The plug with the overheat protection function according to claim 5, wherein the arc portion abuts against the arc portion when the temperature is lower than the operation value.
7. A plug with overheat protection function according to claim 5, wherein silver contact pieces are mounted on the extending ends of the connection terminals, and a connection block capable of contacting with the silver contact pieces is provided on the connection portion.
8. The plug according to claim 2, wherein the protective shell has a first opening and a second opening opposite to each other, the first opening is adapted to the first step, and the thickness of the third step and the extending end of the first terminal is the same as the height of the second opening.
9. The plug with the overheat protection function according to claim 1, further comprising an indicator lamp, a second power line and a second connector, wherein the indicator lamp is mounted on an outer wall of the insulating housing, two terminals of the indicator lamp extend into the insulating housing and are respectively connected to the connecting terminal and the second connector, and the second power line is connected to the second connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122958272.0U CN217215375U (en) | 2021-11-26 | 2021-11-26 | Plug with overheat protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122958272.0U CN217215375U (en) | 2021-11-26 | 2021-11-26 | Plug with overheat protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217215375U true CN217215375U (en) | 2022-08-16 |
Family
ID=82783262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122958272.0U Active CN217215375U (en) | 2021-11-26 | 2021-11-26 | Plug with overheat protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217215375U (en) |
-
2021
- 2021-11-26 CN CN202122958272.0U patent/CN217215375U/en active Active
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