Reed switch structure

Abstract

The utility model relates to the technical field of reed switches, and discloses a reed switch structure which comprises a glass tube, a first pin is arranged in the middle of one end of the glass tube, and a second pin is arranged in the middle of one end, far away from the first pin, of the glass tube. Protective resin is arranged on the outer walls of the positions, connected with the first pin and the second pin, of the two ends of the glass tube. According to the structure arrangement of the connecting rod, the limiting head, the sliding ball and the spring, a mistaken touch prevention structure is additionally arranged between the first contact and the second contact, the magnetic field where a plurality of reed pipe structures are located is weak, and the pressing force of the second contact by the movable reed cannot resist the force applied to the sliding ball by the spring, so that the sliding ball cannot be extruded between the second contact and the first contact; therefore, the second contact cannot be in contact with the first contact, and the reed switch structure cannot form an access, so that the reed switch structure can be prevented from being mistakenly touched in a weak magnetic field environment, and the working stability of the reed switch structure can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reed switches, in particular to a reed switch structure. Background Art

[0002] A reed switch is also called a dry reed pipe. It is an electrical switch operated by an applied magnetic field. Its basic form is to seal two magnetic reeds in a glass tube. Although the two reeds overlap, there is a small gap in the middle. When the dry reed pipe is in an external magnetic field, the two reeds will contact and conduct. Once the dry reed pipe is pulled away from the magnetic field, the two reeds inside will return to their original position.

[0003] However, the reed switch structure currently on the market does not have an anti-mis-touch structure between the two magnetic reed pieces. In some weak magnetic field environments, the two magnetic reed pieces of the reed switch structure may be accidentally touched, affecting the normal working state. For this reason, a reed switch structure is proposed here. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a reed switch structure, which effectively solves the problems existing in the existing reed switch structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reed switch structure comprises a glass tube, a first pin is arranged in the middle of one end of the glass tube, a second pin is arranged in the middle of one end of the glass tube away from the first pin, protective resin is arranged on the outer walls of the positions where the first and second pins are connected at both ends of the glass tube, a fixed spring piece is arranged at the lower part of the end of the first pin extending into the glass tube, a first contact is arranged at the upper part of the end of the fixed spring piece away from the first pin, a moving spring piece is arranged at the upper part of the end of the second pin extending into the glass tube, a second contact is arranged at the lower part of the end of the moving spring piece away from the second pin, a connecting rod is arranged at the end of the second pin located at the lower end of the moving spring piece, a limiting head is arranged at the end of the connecting rod away from the second pin, a sliding ball is arranged at the periphery of the connecting rod located on one side of the limiting head, and a spring is arranged at the periphery of the connecting rod located between the sliding ball and the end of the second pin.

[0006] Preferably, the first pin is bonded to the end of the glass tube by the protective resin, the protective resin seals the connection between the first pin and the glass tube, the glass tube is filled with inert gas, and the protective resin can ensure the sealing between the first pin and the glass tube.

[0007] Preferably, the second pin is bonded to the end of the glass tube by the protective resin, and the protective resin seals the connection between the second pin and the glass tube. The protective resin can ensure the sealing between the second pin and the glass tube.

[0008] Preferably, the fixed spring piece is connected to the end of the first pin via a screw, the first contact is connected to the fixed spring piece via a screw, the fixed spring piece is a magnetic spring piece, and the surface of the first contact is plated with rhodium, which is a hard metal.

[0009] Preferably, the movable reed is connected to the upper end of the second pin by a screw, and the second contact is connected to the movable reed by a screw. The movable reed is also a magnetic reed, and the surface of the second contact is plated with rhodium, which is a hard metal. The hard metal rhodium plated on the surface of the first contact and the second contact can greatly improve the life of the reed switch structure in terms of switching times.

[0010] Preferably, the connecting rod is glued to the end of the second pin, the limiting head is formed on the connecting rod, and the connecting rod and the limiting head are made of plastic.

[0011] Preferably, the sliding ball is slidably connected to the outer wall of the connecting rod, the sliding ball overlaps the upper end of the first contact, the spring is clamped on the outer periphery of the connecting rod between the sliding ball and the end of the second pin, the sliding ball is made of plastic, and when the second contact is pressed down, the sliding ball can be squeezed to slide in the direction of the second pin, and then the lower end of the second contact can contact the upper end of the first contact, so that the reed switch structure can be turned on.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the reed switch structure, the connecting rod, the limit head, the sliding ball and the spring are arranged to increase a structure to prevent accidental touch between the first contact and the second contact. The magnetic field in which the reed switch structures are located is relatively weak, and the force of the moving reed sheet pressing the second contact downward cannot counteract the force applied by the spring to the sliding ball. In this way, the sliding ball will not be squeezed out from between the second contact and the first contact, the second contact and the first contact will not be able to contact each other, and the reed switch structure will not be able to form a passage. This can prevent the reed switch structure from being accidentally touched in a weaker magnetic field environment, and can effectively improve the working stability of the reed switch structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure when the second contact and the first contact are in contact in the utility model;

[0017] Figure 3 For this utility model Figure 1 A partial enlarged view of the middle A;

[0018] Figure 4 For this utility model Figure 2 A partial enlarged view of point B in the middle;

[0019] In the figure: 1. glass tube; 2. first pin; 3. second pin; 4. protective resin; 5. fixed spring; 6. first contact; 7. moving spring; 8. second contact; 9. connecting rod; 10. limit head; 11. sliding ball; 12. spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In this embodiment, Figure 1-4 The utility model comprises a glass tube 1, a first pin 2 is arranged in the middle of one end of the glass tube 1, a second pin 3 is arranged in the middle of one end of the glass tube 1 away from the first pin 2, protective resin 4 is arranged on the outer walls of the positions where the two ends of the glass tube 1 are connected with the first pin 2 and the second pin 3, a fixed spring piece 5 is arranged at the lower part of one end of the first pin 2 extending into the glass tube 1, a first contact 6 is arranged at the upper part of the end of the fixed spring piece 5 away from the first pin 2, a moving spring piece 7 is arranged at the upper part of one end of the second pin 3 extending into the glass tube 1, a second contact 8 is arranged at the lower part of the end of the moving spring piece 7 away from the second pin 3, a connecting rod 9 is arranged at the end of the second pin 3 located at the lower end of the moving spring piece 7, a limiting head 10 is arranged at the end of the connecting rod 9 away from the second pin 3, a sliding ball 11 is arranged at the periphery of the connecting rod 9 located on one side of the limiting head 10, and a spring 12 is arranged at the periphery of the connecting rod 9 located between the sliding ball 11 and the end of the second pin 3.

[0022] The first pin 2 is bonded to the end of the glass tube 1 by a protective resin 4 , which seals the connection between the first pin 2 and the glass tube 1 . The glass tube 1 is filled with an inert gas, and the protective resin 4 can ensure the sealing between the first pin 2 and the glass tube 1 .

[0023] Among them, the second pin 3 is glued to the end of the glass tube 1 by a protective resin 4, the protective resin 4 seals the connection between the second pin 3 and the glass tube 1, and the protective resin 4 can ensure the sealing between the second pin 3 and the glass tube 1. The fixed spring piece 5 is connected to the end of the first pin 2 by screws, and the first contact 6 is connected to the fixed spring piece 5 by screws. The fixed spring piece 5 is a magnetic spring piece.

[0024] Among them, the movable reed 7 is connected to the upper end of the second pin 3 by screws, and the second contact 8 is connected to the movable reed 7 by screws. The movable reed 7 is also a magnetic reed. The surface of the first contact 6 and the second contact 8 is plated with rhodium, which is a hard metal. The hard metal rhodium plated on the surface of the first contact 6 and the second contact 8 can greatly improve the life of the switching times of the reed switch structure.

[0025] The connecting rod 9 is glued to the end of the second pin 3 , and the limiting head 10 is formed on the connecting rod 9 . The connecting rod 9 and the limiting head 10 are made of plastic.

[0026] Among them, the sliding ball 11 is slidably connected to the outer wall of the connecting rod 9, the sliding ball 11 overlaps the upper end of the first contact 6, and the spring 12 is clamped on the outer periphery of the connecting rod 9 between the sliding ball 11 and the end of the second pin 3. The sliding ball 11 is made of plastic. When the second contact 8 is pressed down, the sliding ball 11 can be squeezed to slide in the direction of the second pin 3, and then the lower end of the second contact 8 can contact the upper end of the first contact 6, so that the reed switch structure can be turned on.

[0027] Working principle: When the reed switch structure is in a magnetic field, the moving reed piece 7 will approach the fixed reed piece 5 under the action of the magnetic field, that is, the second contact 8 will approach the first contact 6. When the magnetic field in which the reed switch structure is located is strong enough, the second contact 8 can press down to squeeze the sliding ball 11, causing the sliding ball 11 to slide in the direction of the second pin 3, and then the lower end of the second contact 8 can contact the upper end of the first contact 6, so that the reed switch structure can be turned on. When the magnetic field in which some reed switch structures are located is weak, the force of the moving reed piece 7 pressing down the second contact 8 cannot counteract the force applied by the spring 12 to the sliding ball 11, so that the sliding ball 11 will not be squeezed out from between the second contact 8 and the first contact 6, the second contact 8 cannot contact the first contact 6, and the reed switch structure cannot form a passage, which can prevent the reed switch structure from accidentally touching in a weaker magnetic field environment.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reed switch structure, comprising a glass tube (1), characterized in that: A first pin (2) is provided in the middle of one end of the glass tube (1), a second pin (3) is provided in the middle of one end of the glass tube (1) away from the first pin (2), protective resin (4) is provided on the outer walls of the two ends of the glass tube (1) where the first pin (2) and the second pin (3) are connected, a fixed spring (5) is provided at the lower part of the end of the first pin (2) extending into the glass tube (1), a first contact (6) is provided at the upper part of the end of the fixed spring (5) away from the first pin (2), and the second pin (3) extending into the glass tube (1) is provided with a first contact (6). A movable spring (7) is arranged at the upper part of one end, a second contact (8) is arranged at the lower part of the end of the movable spring (7) away from the second pin (3), a connecting rod (9) is arranged at the end of the second pin (3) located at the lower end of the movable spring (7), a limiting head (10) is arranged at the end of the connecting rod (9) away from the second pin (3), a sliding ball (11) is arranged on the periphery of the connecting rod (9) located on one side of the limiting head (10), and a spring (12) is arranged on the periphery of the connecting rod (9) located between the sliding ball (11) and the end of the second pin (3).

2. A reed switch structure according to claim 1, characterized in that: The first tube pin (2) is bonded to the end of the glass tube (1) by means of the protective resin (4), and the protective resin (4) seals the connection between the first tube pin (2) and the glass tube (1).

3. A reed switch structure according to claim 1, characterized in that: The second tube pin (3) is glued to the end of the glass tube (1) by means of the protective resin (4), and the protective resin (4) seals the connection between the second tube pin (3) and the glass tube (1).

4. A reed switch structure according to claim 1, characterized in that: The fixed spring piece (5) is connected to the end of the first pin (2) via a screw, and the first contact (6) is connected to the fixed spring piece (5) via a screw.

5. A reed switch structure according to claim 1, characterized in that: The movable reed (7) is connected to the upper end of the second pin (3) via screws, and the second contact (8) is connected to the movable reed (7) via screws.

6. A reed switch structure according to claim 1, characterized in that: The connecting rod (9) is glued to the end of the second pin (3), and the limiting head (10) is formed on the connecting rod (9).

7. A reed switch structure according to claim 1, characterized in that: The sliding ball (11) is slidably connected to the outer wall of the connecting rod (9), the sliding ball (11) overlaps the upper end of the first contact (6), and the spring (12) is clamped on the outer periphery of the connecting rod (9) between the sliding ball (11) and the end of the second pin (3).

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