CN110706974A - Normally closed reed switch - Google Patents
Normally closed reed switch Download PDFInfo
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- CN110706974A CN110706974A CN201910967258.1A CN201910967258A CN110706974A CN 110706974 A CN110706974 A CN 110706974A CN 201910967258 A CN201910967258 A CN 201910967258A CN 110706974 A CN110706974 A CN 110706974A
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- elastic sheet
- magnetic
- conductive
- magnetic conduction
- conductive elastic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/008—Change of magnetic field wherein the magnet and switch are fixed, e.g. by shielding or relative movements of armature
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The invention relates to the technical field of reed pipes and discloses a normally closed reed pipe which comprises a pipe body, a first magnetic conductive elastic sheet and a second magnetic conductive elastic sheet, wherein one end of the first magnetic conductive elastic sheet and one end of the second magnetic conductive elastic sheet are both positioned in the pipe body and are overlapped with each other, one end of the first magnetic conductive elastic sheet is provided with a conductive branching structure, the second magnetic conductive elastic sheet is positioned between the first magnetic conductive elastic sheet and the conductive branching structure, and an insulating layer is arranged between one end of the second magnetic conductive elastic sheet and one end of the first magnetic conductive elastic sheet. When the second magnetic conductive elastic sheet is not triggered, one end of the second magnetic conductive elastic sheet is contacted with the conductive branched structure, and the reed switch is conducted; when the switch is triggered, under the action of an external magnetic field, one end of the second magnetic conduction elastic sheet bends towards the first magnetic conduction elastic sheet, the second magnetic conduction elastic sheet is separated from the conductive branching structure, and the first magnetic conduction elastic sheet and the second magnetic conduction elastic sheet cannot be switched on after being mutually attracted due to the insulating layer, so that the second magnetic conduction elastic sheet and the first magnetic conduction elastic sheet are switched from a switching-on state to a switching-off state. Simple structure and convenient use.
Description
Technical Field
The invention relates to the technical field of reed switches, in particular to a normally closed reed switch.
Background
At present, a normally open reed switch is attached with a magnet to keep the normally open reed switch closed, and when the normally open reed switch is used, the normally open reed switch is triggered by a magnet with opposite polarity to disconnect the normally open reed switch. The disadvantage of this method is that the magnetic field strength of the two magnets cannot differ much, and if the strength of the magnet used for triggering is much weaker than that of the magnet attached, the reed switch cannot be disconnected; if the strength is too strong, after the switch is switched off, the triggered magnet can magnetize the elastic sheet in the reed pipe again, and the reed pipe can be closed again; if the polarity direction of the magnet is wrong in the using process, the reed switch can not be disconnected. In addition, the process of attaching the magnet to the reed switch requires professional equipment and is difficult to achieve. In addition, a switching type reed switch is adopted, the normally open pins are not used, the normally closed pins are only used, and the normally open pins are used as normally closed reed switches. So that both of these ways are inconvenient to use.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a normally closed reed switch which is simple in structure and convenient to use.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a normally closed reed switch comprises a pipe body, wherein a first magnetic conductive elastic sheet and a second magnetic conductive elastic sheet are respectively arranged at two ends of the pipe body, one end of the first magnetic conductive elastic sheet and one end of the second magnetic conductive elastic sheet are both positioned in the pipe body, one end of the first magnetic conductive elastic sheet and one end of the second magnetic conductive elastic sheet are overlapped with each other, a conductive branching structure is arranged at one end of the first magnetic conductive elastic sheet, one end of the second magnetic conductive elastic sheet is positioned between one end of the first magnetic conductive elastic sheet and the conductive branching structure, and an insulating layer is arranged between one end of the second magnetic conductive elastic sheet and one end of the first magnetic conductive elastic sheet; when the second magnetic conductive elastic sheet is not triggered, one end of the second magnetic conductive elastic sheet is contacted with the conductive branched structure; when the magnetic switch is triggered, under the action of an external magnetic field, one end of the second magnetic conductive elastic sheet bends towards the first magnetic conductive elastic sheet, and one end of the second magnetic conductive elastic sheet is separated from the conductive branched structure.
As an improvement of the above technical solution, the insulating layer covers one end of the first magnetic conductive elastic sheet.
As an improvement of the above technical solution, the insulating layer covers one end of the second magnetic conductive elastic sheet, and the insulating layer is located on the second magnetic conductive elastic sheet and close to the side surface of the first magnetic conductive elastic sheet.
As an improvement of the above technical solution, the conductive bifurcated structure is made of a conductive and non-conductive material.
As an improvement of the above technical solution, the conductive bifurcated structure is an L-shaped conductive sheet, and one end of the L-shaped conductive sheet is connected to one end of the first magnetic conductive elastic sheet.
As an improvement of the above technical solution, the other end of the L-shaped conductive plate is parallel to the first magnetic conductive elastic piece, and the second magnetic conductive elastic piece is located between one end of the first magnetic conductive elastic piece and the other end of the L-shaped conductive plate.
As an improvement of the above technical solution, a gap is formed between one end of the second magnetic conductive elastic sheet and one end of the L-shaped conductive sheet.
As an improvement of the above technical solution, the first magnetic conductive elastic piece and the second magnetic conductive elastic piece are made of an electrically and magnetically conductive material.
As an improvement of the technical scheme, the tube body is an insulating tube.
As an improvement of the above technical solution, one end of the first magnetic conductive elastic sheet and one end of the second magnetic conductive elastic sheet are both sealed in the tube body, and the tube body is filled with inert gas.
The invention has the following beneficial effects:
when the normally closed reed switch is in a natural state, namely when the normally closed reed switch is not triggered, one end of the second magnetic conductive elastic sheet is contacted with the conductive bifurcation structure, and the conductive bifurcation structure can conduct electricity, so that the second magnetic conductive elastic sheet is conducted with the first magnetic conductive elastic sheet; when an external magnetic field acts, the first magnetic conduction elastic sheet and the second magnetic conduction elastic sheet can conduct magnetism, and the polarities of the first magnetic conduction elastic sheet and the second magnetic conduction elastic sheet are opposite and mutually attracted after magnetization, so that one end of the second magnetic conduction elastic sheet bends towards the first magnetic conduction elastic sheet, the second magnetic conduction elastic sheet which is originally mutually attached is separated from the conductive branched structure of the conductive branched structure, and the first magnetic conduction elastic sheet and the second magnetic conduction elastic sheet cannot be conducted after mutual attraction, so that the second magnetic conduction elastic sheet and the first magnetic conduction elastic sheet are changed into a disconnected state from a conducting state; when the external magnetic field disappears, the first magnetic conductive elastic sheet and the second magnetic conductive elastic sheet return to the initial state under the action of the elastic force of the first magnetic conductive elastic sheet and the second magnetic conductive elastic sheet, namely, the state that one end of the second magnetic conductive elastic sheet is communicated with the conductive branched structure. The normally closed reed switch only has two pins, and does not need to be identified during wiring and does not need to worry about short circuit; when in use, the polarity direction of an external magnetic field does not need to be distinguished; during manufacturing, the reed switch does not need to be attached with a magnet; when in use, the reed switch is as simple and convenient as a common normally open reed switch.
Drawings
The invention is further described with reference to the following detailed description of embodiments and drawings, in which:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a reed switch in a natural state according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a partial cross-sectional structure of a reed switch in a natural state according to an embodiment of the present invention;
FIG. 4 is a schematic partial sectional view of a reed switch under the action of an applied magnetic field according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1 to 4, the normally closed reed switch of the present invention includes a tube body 1, where the tube body 1 is an insulating tube, and in this embodiment, the tube body 1 is a glass tube; the arc spark protection tube is characterized in that a first magnetic conduction elastic sheet 2 and a second magnetic conduction elastic sheet 3 are respectively arranged at two ends of the tube body 1, one end of the first magnetic conduction elastic sheet 2 and one end of the second magnetic conduction elastic sheet 3 are both sealed inside the tube body 1, and the tube body 1 is filled with inert gas to protect the first magnetic conduction elastic sheet 2 and the second magnetic conduction elastic sheet 3 from being oxidized and corroded when an electric arc spark is generated due to the fact that a circuit is switched on or switched off.
Further, the length direction of the first magnetic conductive elastic piece 2 and the length direction of the second magnetic conductive elastic piece 3 are both parallel to the length direction of the pipe body 1, and the first magnetic conductive elastic piece 2 and the second magnetic conductive elastic piece 3 are both made of an electrically and magnetically conductive material, such as a soft magnetic material, in this embodiment, the first magnetic conductive elastic piece 2 and the second magnetic conductive elastic piece 3 are both made of iron-nickel alloy. One end of the first magnetic conduction elastic sheet 2 and one end of the second magnetic conduction elastic sheet 3 are mutually overlapped in the length direction, and the overlapped length range is 0.1 mm-100 mm, preferably 0.3 mm-10 mm, and further preferably 0.5 mm-2.5 mm.
Specifically, an electrically conductive bifurcated structure 4 is welded at one end of the first magnetically conductive elastic piece 2, and the electrically conductive bifurcated structure 4 is made of an electrically conductive and magnetically non-conductive material, such as a non-conductive metal material like copper, aluminum, silver, or an alloy containing no magnetically conductive material. A part of the conductive fork structure 4 is located on a plane where the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3 are located together, the second magnetic conductive elastic sheet 3 is located between one end of the first magnetic conductive elastic sheet 2 and the conductive fork structure 4, and an insulating layer 5 is arranged between one end of the second magnetic conductive elastic sheet 3 and one end of the first magnetic conductive elastic sheet 2.
Furthermore, the connection relationship between the insulating layer 5 and the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3 is various.
First, the insulating layer 5 covers one end of the second magnetic conductive elastic sheet 3, and the insulating layer 5 is located on the side surface of the second magnetic conductive elastic sheet 3 close to the first magnetic conductive elastic sheet 2. Furthermore, except for the portion of the second magnetic conductive elastic sheet 3 contacting the conductive branch structure 4, the insulating layer 5 cannot be covered, and the other portions of the second magnetic conductive elastic sheet 3 are covered with the insulating layer 5. Of course, the useful part is still the insulating layer 5 between the second magnetic conductive elastic piece 3 and the first magnetic conductive elastic piece 2.
In the second mode, the insulating layer 5 covers one end of the first magnetic conductive elastic sheet 2. In this embodiment, the insulating layer 5 covers the side surface of the first magnetic conductive elastic sheet 2 close to the second magnetic conductive elastic sheet 3. The insulating layer 5 is sprayed or soaked on the first magnetic conductive elastic sheet 2. Of course, the insulating layer 5 may cover any other side surface of the first magnetic conductive elastic sheet 2 besides the side surface, for example, the insulating layer 5 is in a sleeve shape and wraps one end of the first magnetic conductive elastic sheet 2, and of course, the useful part is still the insulating layer 5 between the second magnetic conductive elastic sheet 3 and the first magnetic conductive elastic sheet 2.
Referring to fig. 3, in a natural state, that is, when there is no external magnetic field, the reed switch is not triggered, one end of the second magnetic conductive elastic piece 3 contacts the conductive branch structure 4, and the conductive branch structure 4 can conduct electricity, so that the second magnetic conductive elastic piece 3 is conducted with the first magnetic conductive elastic piece 2.
Referring to fig. 4, under the action of an external magnetic field, the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3 are both capable of conducting magnetic, and attract each other after being magnetized, so that one end of the second magnetic conductive elastic sheet 3 bends toward the first magnetic conductive elastic sheet 2, the originally mutually attached second magnetic conductive elastic sheet 3 is separated from the conductive branch structure 4, and the insulating layer 5 is arranged between one end of the second magnetic conductive elastic sheet 3 and one end of the first magnetic conductive elastic sheet 2, so that the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3 still cannot be conducted after attracting each other, and thus the second magnetic conductive elastic sheet 3 and the first magnetic conductive elastic sheet 2 are changed from a conducting state to a disconnecting state.
When the external magnetic field disappears, the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3 return to the initial state under the action of their own elastic force, i.e. the state that one end of the second magnetic conductive elastic sheet 3 is conducted with the conductive fork structure 4. The normally closed reed switch only has two pins, which pin does not need to be identified during wiring, and short circuit does not need to be worried about; when in use, the polarity direction of an external magnetic field does not need to be distinguished; during manufacturing, the reed switch does not need to be attached with a magnet; when in use, the reed switch is as simple and convenient as a common normally open reed switch.
Specifically, only a part of the conductive branch structure 4 is located on a common plane of the first magnetic conductive elastic sheet 2 and the second magnetic conductive elastic sheet 3. Therefore, the conductive branched structure 4 can be linear, the conductive branched structure 4 and the first magnetic conductive elastic sheet 2 form a Y-shaped structure, and the edge of the end surface of the second magnetic conductive elastic sheet 3 is in contact with the side surface of the conductive branched structure 4 in a natural state; the conductive forked structure 4 can also be in a step shape, a gap is reserved between one end of the conductive forked structure 4 close to the first magnetic conductive elastic sheet 2 and the end face of the second magnetic conductive elastic sheet 3, and in a natural state, one end of the conductive forked structure 4 far away from the first magnetic conductive elastic sheet 2 is in contact with the end face of the second magnetic conductive elastic sheet 3; the conductive bifurcating structure 4 may also be of other shapes.
In this embodiment, the conductive bifurcated structure 4 is an L-shaped conductive sheet, one end of the L-shaped conductive sheet is connected to one end of the first magnetic conductive elastic sheet 2, and the conductive bifurcated structure 4 and the first magnetic conductive elastic sheet 2 form an h-shaped structure. The other end of the L-shaped conducting strip is parallel to the first magnetic conducting elastic piece 2, namely the other end of the L-shaped conducting strip is parallel to the second magnetic conducting elastic piece 3, so that the contact area between the second magnetic conducting elastic piece 3 and the L-shaped conducting strip is increased, the conducting effect is ensured, and the second magnetic conducting elastic piece 3 is positioned between one end of the first magnetic conducting elastic piece 2 and the other end of the L-shaped conducting strip. A gap is formed between one end of the second magnetic conduction elastic sheet 3 and one end of the L-shaped conducting sheet, so that the second magnetic conduction elastic sheet 3 is separated from the L-shaped conducting sheet in the process of attracting the first magnetic conduction elastic sheet 2, and the second magnetic conduction elastic sheet 3 is successfully disconnected from the first magnetic conduction elastic sheet 2.
The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any similar or identical means.
Claims (10)
1. A normally closed reed switch is characterized in that: the pipe comprises a pipe body (1), wherein a first magnetic conduction elastic sheet (2) and a second magnetic conduction elastic sheet (3) are respectively arranged at two ends of the pipe body (1), one end of the first magnetic conduction elastic sheet (2) and one end of the second magnetic conduction elastic sheet (3) are both positioned in the pipe body (1), one end of the first magnetic conduction elastic sheet (2) and one end of the second magnetic conduction elastic sheet (3) are mutually overlapped, a conductive fork structure (4) is arranged at one end of the first magnetic conduction elastic sheet (2), one end of the second magnetic conduction elastic sheet (3) is positioned between one end of the first magnetic conduction elastic sheet (2) and the conductive fork structure (4), and an insulating layer (5) is arranged between one end of the second magnetic conduction elastic sheet (3) and one end of the first magnetic conduction elastic sheet (2);
when the magnetic conductive elastic sheet is not triggered, one end of the second magnetic conductive elastic sheet (3) is contacted with the conductive branched structure (4);
when the magnetic conductive elastic sheet is triggered, under the action of an external magnetic field, one end of the second magnetic conductive elastic sheet (3) bends towards the first magnetic conductive elastic sheet (2), and one end of the second magnetic conductive elastic sheet (3) is separated from the conductive branched structure (4).
2. A normally closed reed switch according to claim 1, wherein: the insulating layer (5) covers one end of the first magnetic conduction elastic sheet (2).
3. A normally closed reed switch according to claim 1, wherein: the insulating layer (5) covers one end of the second magnetic conduction elastic sheet (3), and the insulating layer (5) is positioned on the side surface, close to the first magnetic conduction elastic sheet (2), of the second magnetic conduction elastic sheet (3).
4. A normally closed reed switch according to claim 1, wherein: the conductive bifurcation structure (4) is made of conductive and non-conductive materials.
5. A normally closed reed switch according to any one of claims 1 to 4, wherein: the conductive fork structure (4) is an L-shaped conductive sheet, and one end of the L-shaped conductive sheet is connected to one end of the first magnetic conductive elastic sheet (2).
6. A normally closed reed switch according to claim 5, wherein: the other end of the L-shaped conducting strip is parallel to the first magnetic conduction elastic sheet (2), and the second magnetic conduction elastic sheet (3) is located between one end of the first magnetic conduction elastic sheet (2) and the other end of the L-shaped conducting strip.
7. A normally closed reed switch according to claim 6, wherein: and a gap is reserved between one end of the second magnetic conductive elastic sheet (3) and one end of the L-shaped conductive sheet.
8. A normally closed reed switch according to claim 1, wherein: the first magnetic conduction elastic sheet (2) and the second magnetic conduction elastic sheet (3) are both made of conductive and magnetic conduction materials.
9. A normally closed reed switch according to claim 1, wherein: the tube body (1) is an insulating tube.
10. A normally closed reed switch according to claim 1 or 9, wherein: one end of the first magnetic conduction elastic sheet (2) and one end of the second magnetic conduction elastic sheet (3) are both sealed in the pipe body (1), and the pipe body (1) is filled with inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910967258.1A CN110706974A (en) | 2019-10-12 | 2019-10-12 | Normally closed reed switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910967258.1A CN110706974A (en) | 2019-10-12 | 2019-10-12 | Normally closed reed switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110706974A true CN110706974A (en) | 2020-01-17 |
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ID=69199542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910967258.1A Pending CN110706974A (en) | 2019-10-12 | 2019-10-12 | Normally closed reed switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110706974A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6258527A (en) * | 1985-09-06 | 1987-03-14 | 沖電気工業株式会社 | Brake type lead switch |
| JPS63254622A (en) * | 1987-04-13 | 1988-10-21 | 沖電気工業株式会社 | Lead switch |
| CN1610029A (en) * | 2004-11-17 | 2005-04-27 | 袁媛 | Normally closed dry reed pipe |
| CN200941362Y (en) * | 2006-09-08 | 2007-08-29 | 周柔刚 | Normally closed dry reed magnetic controlled switch |
| CN203826286U (en) * | 2014-05-13 | 2014-09-10 | 中国长江电力股份有限公司 | Anti-interference type magnetic memory switch |
-
2019
- 2019-10-12 CN CN201910967258.1A patent/CN110706974A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6258527A (en) * | 1985-09-06 | 1987-03-14 | 沖電気工業株式会社 | Brake type lead switch |
| JPS63254622A (en) * | 1987-04-13 | 1988-10-21 | 沖電気工業株式会社 | Lead switch |
| CN1610029A (en) * | 2004-11-17 | 2005-04-27 | 袁媛 | Normally closed dry reed pipe |
| CN200941362Y (en) * | 2006-09-08 | 2007-08-29 | 周柔刚 | Normally closed dry reed magnetic controlled switch |
| CN203826286U (en) * | 2014-05-13 | 2014-09-10 | 中国长江电力股份有限公司 | Anti-interference type magnetic memory switch |
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Application publication date: 20200117 |
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| RJ01 | Rejection of invention patent application after publication |