Magnetic reed switch assembly and method
11456134 · 2022-09-27
Assignee
Inventors
Cpc classification
H01H9/04
ELECTRICITY
H01H36/0046
ELECTRICITY
H01H36/0013
ELECTRICITY
H01H51/28
ELECTRICITY
H01H2036/0086
ELECTRICITY
International classification
H01H36/00
ELECTRICITY
Abstract
A magnet reed switch assembly. The magnetic reed switch assembly includes a reed switch having a body and a pair of electrical contacts disposed in the body. A ring magnet has a bore, and a portion of the body of the reed switch is disposed within the bore, with the ring magnet positioned close to the pair of electrical contacts. The ring magnet is movable along the axis of the body between a first position and a second position. A plunger includes a proximal end coupled to the ring magnet and a distal end having a sensing magnet. When a ferrous target is disposed near the sensing magnet, the plunger moves toward the ferrous target causing the ring magnet to move from the first position to the second position, and the reed switch to move from an open state to a closed state.
Claims
1. A magnetic reed switch assembly, comprising: a reed switch having a tubular body with an axis and a pair of electrical contacts disposed in the tubular body, the pair of electrical contacts in a non-contacting position in an open state of the reed switch; a ring magnet having a bore, and a portion of the tubular body of the reed switch disposed within the bore, such that the ring magnet is positioned close to the pair of electrical contacts and movable along the axis of the tubular body between a first position and a second position; and a plunger having a proximal end coupled to the ring magnet and a distal end having a sensing magnet, where, when a target is disposed near the sensing magnet, the plunger moves toward the target causing the ring magnet to move along the axis of the tubular body from the first position to the second position and the reed switch to move from an open state to a closed state, the closed state in which the pair of electrical contacts are contacting each other.
2. The magnetic reed switch assembly of claim 1, wherein the tubular body includes a proximal end and a distal end, and further comprising at least one wire extending outside of the tubular body of the reed switch, the at least one wire comprises a first wire extending into the proximal end of the tubular body of the magnetic reed switch and coupled to a first electrical contact of the pair of electrical contacts, and a second wire extending into the distal end of the tubular body of the magnetic reed switch and coupled to a second electrical contact of the pair of electrical contacts.
3. The magnetic reed switch assembly of claim 2, further comprising a third wire extending into the proximal end of the tubular body of the magnetic reed switch and disposed one or more of adjacent to or below the first wire, wherein the third wire is coupled to a third electrical contact separate from and in addition to the first and second electrical contacts of the pair of electrical contacts, the third electrical contact in contact with the second electrical contact when the magnetic reed switch is in the open state.
4. The magnetic reed switch assembly of claim 1, further including a housing enclosing the ring magnet, the plunger, and a portion of the reed switch, the housing including a proximal end and a distal end, with a first housing portion disposed at the distal end, such that a portion of the tubular body of the reed switch extends outside of the proximal end of the housing, and a portion of the sensing magnet coupled to the distal end of the plunger is disposed outside of the distal end of the housing, and a second housing portion coupled to the first housing portion and including an inside surface limiting movement of the ring magnet.
5. The magnetic reed switch assembly of claim 4, further comprising an offset wire extending from the proximal end of the housing, the offset wire adjacent to and offset from at least one wire extending from the tubular body of the reed switch at the proximal end of the housing, wherein the offset wire extending from the proximal end of the housing and the at least one wire extending from the tubular body of the reed switch are disposed parallel to each other.
6. The magnetic reed switch assembly of claim 1, wherein the tubular body of the reed switch comprises glass, and the target comprises a ferrous target having at least one ferrous material, such as a magnet.
7. The magnetic reed switch assembly of claim 4, wherein the housing further includes an end portion disposed at the proximal end of the housing, the end portion having a bore and an inside surface, the bore for receiving a portion of the tubular body of the reed switch and the inside surface having a hollow projection extending therefrom, the hollow projection receiving another portion of the tubular body of the reed switch.
8. The magnetic reed switch of claim 1, wherein the ring magnet is in the first position near the pair of electrical contacts when the reed switch is in an open state, and the ring magnet is in the second position closer to the pair of electrical contact than the first position when the reed switch is in a closed state.
9. A magnetic reed switch, comprising: a body with an axis and a pair of electrical contacts disposed in the body, the pair of electrical contacts movable between a non-contacting position in which the pair of electrical contacts are moved away from each other and a contacting position in which the pair of electrical contacts are in contact with each other; and a ring magnet having a bore, and a portion of the body disposed within the bore, where, the ring magnet is positioned in a first position near the pair of electrical contacts when the pair of electrical contacts is in the non-contacting position, and the ring magnet is moved to a second position in response to a presence of a target, the second position closer to the pair of electrical contacts, causing the pair of electrical contacts to be moved to the contacting position, and where the ring magnet is adapted to be coupled to a proximal end of a plunger, the distal end of the plunger having a sensing magnet.
10. The magnetic reed switch of claim 9, where the ring magnet is movable in response to a position of the target disposed near the sensing magnet, the target comprising a ferrous target having at least one ferrous material, such as a magnet.
11. The magnetic reed switch of claim 9, further comprising at least one wire lead extending outside of the body of the reed switch, the body forming a seal with the at least one wire and comprising a proximal end and a distal end, the at least one wire including a first wire extending into the proximal end of the body of the reed switch and coupled to a first electrical contact of the pair of electrical contacts, and a second wire extending into the distal end of the body of the reed switch and coupled to a second electrical contact of the pair of electrical contacts.
12. A method of changing states of a magnetic reed switch, the method comprising: moving a target into a sensing area of a sensing magnet coupled to a magnetic reed switch to change a state of the magnetic reed switch, the magnetic reed switch including a body with a portion disposed within a ring magnet; and in response to the presence of the target in the sensing area, triggering a closed state of the magnetic reed switch via movement of the ring magnet along an axis of the body of the magnetic reed switch from a first position to a second position and toward the target, causing a pair of electrical contacts disposed within the body of the magnetic reed switch to contact each other.
13. The method of claim 12, wherein triggering the closed state of the magnetic reed switch via movement of the ring magnet along an axis of a body of the reed switch from a first position to a second position comprises moving the ring magnet closer to one or more of the pair of electrical contacts disposed within the body of the magnetic reed switch or a distal end of the body of the magnetic reed switch.
14. The method of claim 12, wherein, the pair of electrical contacts includes a first electrical contact and a second electrical contact, and triggering the closed state of the magnetic reed switch via movement of the ring magnet along an axis of a body of the reed switch from a first position to a second position comprises moving the ring magnet in response to the presence of the target disposed near the sensing magnet from the first position, in which one or more of the pair of electrical contacts are not contacting each other, a third electrical contact is contacting the second electrical contact, and the magnetic reed switch is in an open state, to the second position, in which one or more of the pair of electrical contacts are contacting each other, the second electrical contact is moved away from third electrical contact, and the magnetic reed switch is in the closed state.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The Figures described below depict various aspects of the system and methods disclosed therein. It should be understood that each figure depicts an example of a particular aspect of the disclosed system and methods, and that each of the figures is intended to accord with a possible example thereof. Further, wherever possible, the following description refers to the reference numerals included in the following figures, in which features depicted in multiple figures are designated with consistent reference numerals.
(2) There are shown in the drawings arrangements which are presently discussed, it being understood, however, that the present examples are not limited to the precise arrangements and instrumentalities shown, wherein:
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DETAILED DESCRIPTION
(13) The present disclosure is directed to a magnetic reed switch assembly comprising a reed switch having a pair of electrical contacts movable between a contacting position, in which the reed switch is in a closed state, and a non-contacting position, in which the reed switch is in an open state. A portion of the reed switch is disposed in a ring magnet, such that the ring magnet is movable between a first position disposed near the pair of electrical contacts and a second position disposed closer to the pair of electrical contacts. A proximal end of a plunger is coupled to the ring magnet having a portion of the reed switch, and a distal end of the plunger is coupled to a sensing magnet. When a ferrous target, such as a ferrous material, is disposed near a sensing area of the sensing magnet, the ring magnet is moved from the first position to the second position closer to the electrical contacts, causing the electrical contacts to contact each other, and the reed switch to move from an open state to a closed state. When the ferrous target is removed from the sensing area of the sensing magnet, the ring magnet moves back to the first position, causing the electrical contacts to move away from each other, and the reed switch to move back to the open state.
(14) Referring now to
(15) The magnetic reed switch assembly 100 also includes a plunger 116 having a proximal end 118 coupled to the ring magnet 112 and a distal end 120 having a sensing magnet 122 coupled thereto.
(16) In addition, and in one example, the magnetic reed switch assembly 100 further includes a housing assembly 124 enclosing the ring magnet 112, the plunger 116, and a portion of the reed switch 110. The housing assembly 124 includes a proximal end 126 and a distal end 128, with a first housing portion 130, such as an end portion, disposed at the proximal end 126. A second housing portion 132 is coupled to the first housing portion 130 and disposed around a portion of the plunger 116 and the ring magnet 112 with the portion of the reed switch 110 disposed therein. A third housing portion 134 is coupled to the second housing portion 132 and disposed close to and/or near the distal end 128 of the housing assembly 124.
(17) As further depicted in
(18) As also depicted in
(19) In one example, the first housing portion 130 may be an end portion 130 of the housing assembly 124. In this example, the end portion 130 includes a central bore 140 for receiving a portion of the reed switch 110 and an inside surface 142. A hollow projection 144 extends from the inside surface 142 of the end portion 130 and receives another portion of the reed switch 110 to further secure the reed switch 110 within the housing assembly 124. As will be appreciated, various other shapes and configurations of the first housing portion 130, such as the end portion 130, may alternatively be used and still fall within the scope of the present disclosure.
(20) Referring now to
(21) As further depicted in
(22) Referring now to
(23) Referring back to
(24) When the ferrous target 170 is moved away from the sensing area SA (
(25) Referring now to
(26) As further depicted in
(27) Referring now to
(28) As further depicted in
(29) As described earlier relative to
(30) Referring now to
(31) Referring now to
(32) As further depicted in
(33) Further, the magnetic reed switch 213 also includes a third wire 261 that likewise extends into the proximal end 256 of the tubular body 250 and is disposed one or more of adjacent to or below the first wire 260 also extending into the proximal end 256 of the tubular body 250. The third wire 261 is also coupled to a third electrical contact 263, separate from and in addition to the pair of electrical contacts 252. In the open state depicted in
(34) Referring now to
(35) When the ferrous target 170 is disposed in a sensing area SA of the sensing magnet 122, such as near the sensing magnet 122, the plunger 116 is actuated in a direction along the axis X toward the ferrous target 170. This actuation causes the ring magnet 112 to move along the axis X of the reed switch 110 from the first position A to the second position B closer to the pair of electrical contacts 252. As a result, the pair of electrical contacts 252 are moved into contact with each other, e.g., are contacting each other, and the reed switch 210 is moved from an open state to a closed state, as depicted in
(36) More specifically, when the plunger 116 is actuated toward the ferrous target 170, the second electrical contact 266 of the pair of electrical contacts 252 moves into contact the first electrical contact 262 and out of contact with the third electrical contact 263, as depicted in
(37) When the ferrous target 170 is moved away from the sensing area SA (
(38) So configured, the foregoing magnetic reed switch assembly 100, 200 and magnetic reed switch 113, 213 operate according to the following exemplary method 300. Specifically, a method of changing states of the magnetic reed switch assembly 110, 210, for example, may include moving the ferrous target 170 into the sensing area SA of the sensing magnet 122 coupled to the magnetic reed switch 113, 213 to change a state of the magnetic reed switch 113, 213, the magnetic reed switch 113,213 including the body 150, 250 with a portion disposed within the ring magnet 112. The method may further include in response to the presence of the ferrous target 170 in the sensing area SA, triggering a closed state of the magnetic reed switch 113, 213 via movement of the ring magnet 112 along the axis X of the body 150, 250 of the magnetic reed switch 113, 213 from a first position to a second position and toward the ferrous target 170, causing the pair of electrical contacts 152, 252 disposed within the body 150, 250 of the magnetic reed switch 113, 213 to contact each other.
(39) In one example, the method 300 may further comprise moving the ferrous target 170 away from the sensing area SA of the sensing magnet 122 coupled to the magnetic reed switch 113, 213 and resetting the magnetic reed switch 113, 213 back to an open state via movement of the ring magnet 112 along the axis of the body from the second position back to the first position, causing the pair of electrical contacts 152, 252 to move away from each other.
(40) In another example, triggering the closed state of the magnetic reed switch 113, 213 via movement of the ring magnet 112 along an axis X of the body 150 of the magnetic reed switch 113, 213 from the first position to the second position may comprise moving the ring magnet 112 closer to the pair of electrical contacts 152, 252 disposed within the body 150, 250 of the magnetic reed switch 113, 213 and/or closer to the distal end 158, 258 of the body 150, 250 of the magnetic reed switch 113, 213. In yet another example, triggering the closed state of the magnetic reed switch 113, 213 via movement of the ring magnet 112 along an axis of the body 150 of the magnetic reed switch 113, 213 from the first position to the second position may comprise moving the ring magnet 112, 213 in response to the presence of the ferrous target 170 disposed near the sensing magnet 122 from the first position, in which the pair of electrical contacts 152, 252 are not contacting each other and the magnetic reed switch 113 is in an open state, to the second position, in which the pair of electrical contacts 152, 252 are contacting each other and the magnetic reed switch 113 is in the closed state.
(41) In yet another example, moving the ferrous target 170 away from the sensing area SA of the sensing magnet 122 coupled to the magnetic reed switch 113, 213 and resetting the magnetic reed switch 113, 213 back to the open state via movement of the ring magnet 112 along the axis of the body 150, 250 of the magnetic reed switch 113, 213 from the second position back to the first position comprises moving the ring magnet 112 away from the pair of electrical contacts 152, 252 disposed within the body 150, 250. In yet another example, moving the ferrous target 170 away from the sensing area SA of the sensing magnet 122 coupled to the magnetic reed switch 113, 213 and resetting the magnetic reed switch 113, 213 back to an open state via movement of the ring magnet 112 along the axis of the body 150, 250 of the magnetic reed switch 113, 213 from the second position back to the first position further comprises moving the ring magnet 112 in response to the absence of the ferrous target 170 from the second position back to the first position in which the pair of electrical contacts 152, 252 are not contacting each other, causing the magnetic reed switch 113, 213 to change from the closed state to the open state.
(42) In view of the foregoing, one of skill in art will appreciate advantages of the magnetic reed switch assembly 100, 200 of the present disclosure. For example, utilizing switch technology, the reed switch 110 operates without the presence of a target magnet, which is a desirable feature. In addition, the magnetic reed switch assembly 100, 200 can accommodate various types of magnetic reed switches, such as those described above relative to each of the magnetic reed switch assemblies 100, 200, in accordance with the principles of the present invention. For example, the magnetic reed switch 113 may include only a pair of electrical contacts 152. Alternatively, the magnetic reed switch 213 may include a pair of electrical contacts 252 and a third electrical contact 263. As will be appreciated, various other types of magnetic reed switches may also be used, such as those having more than three electrical contacts, for example, and still fall within the scope of the present disclosure. This flexibility and adaptability of the magnetic reed switch assembly 100, 200 of the present disclosure are further desirable features.
(43) Although certain assemblies and methods have been described herein in accordance with the teachings of the present disclosure, the scope of coverage of this patent is not limited thereto. On the contrary, while the invention has been shown and described in connection with various preferred embodiments, it is apparent that certain changes and modifications, in addition to those mentioned above, may be made. This patent covers all embodiments of the teachings of the disclosure that fairly fall within the scope of permissible equivalents. Accordingly, it is the intention to protect all variations and modifications that may occur to one of ordinary skill in the art.
(44) The following additional considerations apply to the foregoing discussion. Throughout this specification, plural instances may implement components, operations, or structures described as a single instance. Although individual operations of one or more methods are illustrated and described as separate operations, one or more of the individual operations may be performed concurrently, and nothing requires that the operations be performed in the order illustrated. Structures and functionality presented as separate components in example configurations may be implemented as a combined structure or component. Similarly, structures and functionality presented as a single component may be implemented as separate components. These and other variations, modifications, additions, and improvements fall within the scope of the subject matter herein.
(45) Unless specifically stated otherwise, discussions herein using words such as “processing,” “computing,” “calculating,” “determining,” “presenting,” “displaying,” or the like may refer to actions or processes of a machine (e.g., a computer) that manipulates or transforms data represented as physical (e.g., electronic, magnetic, or optical) quantities within one or more memories (e.g., volatile memory, non-volatile memory, or a combination thereof), registers, or other machine components that receive, store, transmit, or display information.
(46) As used herein any reference to “one implementation,” “one embodiment,” “an implementation,” “an example” or “an embodiment” means that a particular element, feature, structure, or characteristic described in connection with the implementation is included in at least one implementation. The appearances of the phrase “in one implementation” or “in one embodiment” or “in one example” in various places in the specification are not necessarily all referring to the same implementation.
(47) Some implementations may be described using the expression “coupled” along with its derivatives. For example, some implementations may be described using the term “coupled” to indicate that two or more elements are in direct physical or electrical contact. The term “coupled,” however, may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The implementations are not limited in this context.
(48) As used herein, the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
(49) In addition, use of the “a” or “an” are employed to describe elements and components of the implementations herein. This is done merely for convenience and to give a general sense of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
(50) Moreover, the patent claims at the end of this patent application are not intended to be construed under 35 U.S.C. § 112(f) unless traditional means-plus-function language is expressly recited, such as “means for” or “step for” language being explicitly recited in the claim (s).
(51) While various embodiments have been described above, this disclosure is not intended to be limited thereto. Variations can be made to the disclosed embodiments that are still within the scope of the appended claims.