A delay switch

Abstract

The present invention relates to the field of electrical switches, and in particular to a time-delay switch. The characteristics are as follows: It includes two electrodes, one of which is sequentially connected to a conductive elastic member, a conductive permanent magnet, and an armature is arranged at a position corresponding to the conductive permanent magnet. The other electrode is connected to the armature. The two electrodes are respectively fixed at both ends of an elastic cavity. The elastic force of the elastic cavity keeps the conductive permanent magnet and the armature open, thereby opening the two electrodes. When pressing any one of the electrode ends by hand, the elastic cavity is compressed, causing the conductive permanent magnet and the armature to approach and then attract and close stably. After releasing the hand, the elastic cavity stretches the conductive elastic member until the conductive permanent magnet disengages from the armature to open the switch. During this period, there is a stable closing delay time.

Description

Technical Field

[0001] The present invention relates to the field of electrical switches, and particularly to a delay switch. Background Art

[0002] A switch is a commonly used device. For example, in an existing delay relay, an electrified delay relay means that the relay does not immediately change the contact state after being electrified, but instead takes a certain delay before acting (normally closed contacts become open, and normally open contacts close). There are two types of such relays. One is mechanical. After being electrified, the coil drives the armature to be attracted, but due to the control of the air release time of the rubber airbag of the relay (which can be adjusted within a certain range), the contacts act with a delay. The other is that after being electrified, the micro-motor inside the relay rotates, and after decelerating through a gear mechanism with a delay, the contacts act with a delay. In addition, there is another type of relay in a transistor (including integrated circuit) circuit. It controls the charging time of a capacitor in the circuit after being electrified, or uses "second oscillation signals" for counting (i.e., timing) to control the conduction or cutoff of a thyristor or transistor to control the on / off of a circuit or drive an ordinary relay to work, and controls the on / off of the circuit to achieve the delay function.

[0003] The present invention provides a press delay switch, which specifically realizes that after pressing, the switch contacts are stably closed, and after releasing the hand, they remain stably closed for a period of time and then open. Summary of the Invention

[0004] The technical solution of the present invention is as follows:

[0005] A delay switch, characterized in that: it includes two electrodes, one of the electrodes is sequentially connected to a conductive elastic member, a conductive permanent magnet, and an armature is arranged at a position corresponding to the conductive permanent magnet. The other electrode is connected to the armature. The two electrodes are respectively fixed at both ends of an elastic cavity, and the elasticity of the elastic cavity keeps the conductive permanent magnet and the armature open, thereby opening the two electrodes. When pressing either end of the electrode by hand, the elastic cavity is compressed, causing the conductive permanent magnet and the armature to approach and then attract each other to make the switch stably closed. After releasing the hand, the elastic cavity stretches the conductive elastic member until the conductive permanent magnet is separated from the armature to open the switch. During this period, there is a stable closing delay time.

[0006] The described delay switch is characterized in that: the installation positions of the conductive permanent magnet and its corresponding armature can be interchanged.

[0007] The described delay switch is characterized in that: it further includes a normally open magneto-controlled switch. One end of the normally open magneto-controlled switch serves as an electrode of the delay switch, and the other end of the normally open magneto-controlled switch is connected to the armature and is arranged near the armature. When pressing one end of the electrode connected to the conductive elastic member by hand, the pressure compresses the elastic cavity, causing the conductive permanent magnet to attract and magnetize the armature. After the armature is magnetized, the normally open magneto-controlled switch is stably closed. After releasing the hand, the elastic cavity stretches the conductive elastic member until the conductive permanent magnet moves away from the armature, causing the armature to lose its magnetism. The normally open magneto-controlled switch loses the magnetization magnetic field of the armature and opens. During this period, there is a stable closing delay time.

[0008] The described delay switch is characterized in that: the stable closing delay time is determined by the elastic coefficient of the conductive elastic member and the magnetic force of the permanent magnet.

[0009] The described delay switch is characterized in that: the normally open magneto-controlled switch is a normally open reed switch.

[0010] The described delay switch is characterized in that: the conductive elastic member is a spring.

[0011] The described delay switch is characterized in that: the elastic cavity is made of rubber.

[0012] The described delay switch is characterized in that: the elastic cavity is made of conductive rubber.

[0013] The described delay switch is characterized in that: the resistance value of the conductive rubber is 10 megaohms to 1000 megaohms.

[0014] The beneficial effect of the present invention is: to provide a pressing delay switch, specifically realizing that after pressing, the switch contacts are stably closed, and after releasing the hand, they remain stably closed for a period of time and then open. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the device of the present invention.

[0016] Figure 2 It is an implementation scheme in which the installation positions of the conductive permanent magnet and the armature in the present invention are interchanged.

[0017] Figure 3 It is an implementation scheme of the present invention adopting a reed switch.

[0018] Figure 4 It is an application case of eliminating human body static electricity in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 This is the schematic diagram of the device of the present invention, which includes two electrodes 102 and 106. Among them, the electrode 102 is sequentially connected to a conductive elastic member 103, a conductive permanent magnet 104, and an armature 105 is arranged at a position corresponding to the conductive permanent magnet 104. Here, the concept of the armature comes from a relay and can be understood as an iron attracted by a permanent magnet. The electrode 106 is connected to the armature 105 or the armature 105 is the electrode itself. The two electrodes are respectively fixed at both ends of the elastic cavity 101, and the elasticity of the elastic cavity 101 keeps the conductive permanent magnet 104 and the armature 105 open circuit, so that the two electrodes 102 and 106 are open circuit. When pressing the electrode 102 end by hand, the elastic cavity 101 is compressed, resulting in the approach and attraction of the conductive permanent magnet 104 and the armature 105, so that the switch is stably closed. After releasing the hand, the elastic cavity 101 stretches the conductive elastic member 103 until the conductive permanent magnet 104 separates from the armature 105, making the switch open circuit. During this period, there is a stable closing delay time T. Here, the elastic force of the elastic cavity 101 is greater than the attractive force between the conductive permanent magnet 104 and the armature 105, and the stable closing delay time T can be adjusted by the elastic coefficient of the conductive elastic member 103 and the attractive force between the conductive permanent magnet 104 and the armature 105.

[0021] Figure 2 This is an implementation scheme in the present invention where the installation positions of the conductive permanent magnet and the armature are interchanged. The installation positions of the conductive permanent magnet 104 and its corresponding armature 105 can be interchanged.

[0022] Figure 3 This is an implementation scheme of the present invention using a reed switch, which includes a reed switch 302. One end of the reed switch 302 serves as an electrode 106 of the delay switch, and the other end of the reed switch 302 is connected to an armature 302 and arranged near the armature 302 (the armature and the reed switch are arranged in parallel). When pressing one end of the electrode 102 connected to the conductive elastic member 103 by hand, the pressure compresses the elastic cavity 101, resulting in the attraction of the conductive permanent magnet 104 and the armature 302 and magnetizing the armature 302. Before the armature 302 is magnetized, the conductive permanent magnet 104 and the armature 302 have been attracted and electrically connected, and at this time the reed switch 302 is not yet closed, so there will be no conductive spark when the conductive permanent magnet 104 and the armature 302 are attracted and electrically connected. Later, after the armature 302 is magnetized, the reed switch 302 is stably closed. After releasing the hand, the elastic cavity 101 stretches the conductive elastic member 103 until the conductive permanent magnet 104 is far away from the armature 302, making the armature 302 lose its magnetism, and the reed switch 302 loses the magnetization magnetic field of the armature 302 and opens circuit. During this period, there is a stable closing delay time T.

[0023] The reed switch of the present invention is a normally open reed switch. Since the two electrical contacts of the reed switch are located in a closed space, it belongs to an explosion-proof device. Even if an electric spark is generated at the electrical contacts of the reed switch, it will not spread to the outside world. Therefore, it is an intrinsically safe explosion-proof device. Furthermore, the outer wall of the reed switch can be made of non-magnetic material, such as an aluminum tube, so that the explosion-proof effect is better. Here, the reed switch can be extended to a normally open magneto-controlled switch.

[0024] Figure 4 This is an application case of eliminating human static electricity in the present invention. Currently, there is a product of a human static electricity discharge ball, also known as a human static electricity elimination ball. The static electricity elimination ball is a human static electricity discharge product applicable to flammable, explosive and anti-static places. The main purpose of the research and development is to safely discharge the static electricity charges accumulated by the human body itself in flammable, explosive dangerous areas and anti-static places, and avoid fire and explosion accidents, human electric shock and reduce the occurrence of static electricity damage to electronic components caused by human static electricity. However, the existing human static electricity discharge balls are made of stainless steel, and the sphere (touch ball) is connected to the ground. When the hand touches the sphere, the human static electricity is quickly introduced into the ground. During this process, when the hand touches the sphere, there may be a discharge spark, which is not safe for flammable and explosive places. In addition, since it takes a certain amount of time to completely release the human static electricity, but the operator only touches the static electricity discharge sphere during the static electricity discharge process, and cannot subjectively determine the contact time. The time-delay switch of the present invention can provide a stable closing delay time T. Refer to Figure 4 , the electrode 106 is grounded. When the hand presses the electrode 102, the elastic cavity 101 is compressed, causing the conductive permanent magnet 104 and the armature 105 to approach and then attract each other to make the switch close stably. This time is greater than 0.1 second (this time is related to the elastic coefficient of the conductive elastic member and the magnetic force of the conductive permanent magnet, and the required time can be obtained through the elastic coefficient and the magnetic force magnitude), while the time required to directly ground and release the human static electricity is less than 0.1 second (generally 0.08 second). Therefore, this solution achieves the effect of ensuring the time required to quickly release the human static electricity.

[0025] Intrinsic safety originates from GB3836.4-201 standards. Explosion-proof electrical appliances are divided into types such as flameproof type, increased safety type, intrinsic safety type, etc. The characteristic of intrinsic safety type electrical equipment is that all its circuits are intrinsically safe circuits, that is, the electric sparks and thermal effects generated under normal working or specified fault conditions cannot ignite the specified explosive mixture circuit. That is to say, this type of electrical appliance does not rely on the explosion-proof of the shell and filling material, but the energy of the electric sparks or thermal effects generated by its circuit during normal use or when a fault occurs is less than 0.28 mJ, that is, the minimum ignition energy when the gas concentration is 8.5% (the most explosive concentration). Therefore, further, the reed switch implementation shown in Figure 3 can be used.

[0026] In the application case of eliminating human body static electricity, a resistor R can be set to be connected across the two electrodes of the time-delay switch of the present invention to achieve pre-release of human body static electricity, and its resistance value is 10 megohms to 1000 megohms.

[0027] In the application case of eliminating human body static electricity, the elastic cavity can be made of conductive rubber, and its resistance value is 10 megohms to 1000 megohms.

[0028] The conductive rubber in all embodiments of the present invention can be extended to be understood as a semi-conductor elastic material.

[0029] The resistance values of the resistors given in the present invention can be understood as recommended values, which do not necessarily limit the protection scope of this case. Specifically, it shall be implemented with reference to the relevant industry standards, such as GB4385-1995 (the recommended resistance value range is 100 kΩ to 1000 MΩ), GB / T 11210-2014 (the recommended resistance value does not exceed 300 MΩ), GJB 2605-1996, and GB 12014-1989. MΩ means megohm.

[0030] The above application modes and rules do not limit the basic features of the method and system of the present invention, nor do they limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A delay switch, characterized in that: It includes two electrodes. One of the electrodes is sequentially connected to a conductive elastic member, a conductive permanent magnet, and an armature is arranged at a position corresponding to the conductive permanent magnet. The other electrode is connected to the armature. The two electrodes are respectively fixed at both ends of an elastic cavity, and the elasticity of the elastic cavity keeps the conductive permanent magnet and the armature away from each other, thus opening the two electrodes. It further includes a normally open magneto-controlled switch. The normally open magneto-controlled switch is connected to the other electrode of the delay switch. The other end of the normally open magneto-controlled switch is connected to the armature and is arranged near the armature. When one end of the electrode connected to the conductive elastic member is pressed by hand, the pressure compresses the elastic cavity, causing the conductive permanent magnet and the armature to attract and magnetize the armature. After the armature is magnetized, the normally open magneto-controlled switch is stably closed. After releasing the hand, the elastic cavity stretches the conductive elastic member until the conductive permanent magnet is away from the armature and the armature loses its magnetism. The normally open magneto-controlled switch loses the magnetization magnetic field of the armature and opens. During this period, there is a stable closing delay time.

2. The time-delay switch according to claim 1, characterized in that: The installation positions of the conductive permanent magnet and its corresponding armature are interchanged.

3. The time-delay switch according to claim 1, characterized in that: The normally open magneto-controlled switch is a normally open reed switch.

4. A delay switch according to claim 1 or 2 or 3, characterized in that: The stable closing delay time is determined by the elastic coefficient of the conductive elastic member and the magnetic force of the permanent magnet.

5. A delay switch according to claim 1 or 2 or 3, characterized in that: The conductive elastic member is a spring.

6. A delay switch according to claim 1 or 2 or 3, characterized in that: The elastic cavity is made of rubber.

7. A delay switch according to claim 1 or 2 or 3, characterized in that: The elastic cavity is made of conductive rubber.

8. The time-delay switch according to claim 7, characterized in that: The resistance value of the conductive rubber is 10 megaohms to 1000 megaohms.

9. A delay switch according to claim 1 or 2 or 3, characterized in that: A resistor R is connected across the two electrodes of the delay switch to achieve pre-release of human static electricity, and its resistance value is 10 megaohms to 1000 megaohms.

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