Safety sensing switch

Abstract

The utility model discloses a safety sensing switch, which is used for sensing signals and feeding back the signals to control equipment, and is characterized by comprising a first sensing circuit and a second sensing circuit which are connected in parallel, the first sensing circuit comprises a first normally-open magnetic reed pipe and a first normally-closed magnetic reed pipe which are connected in series, and the second sensing circuit comprises a second normally-closed magnetic reed pipe and a second normally-open magnetic reed pipe which are connected in parallel. The second induction circuit comprises a second normally-open magnetic reed pipe and a second normally-closed magnetic reed pipe which are connected in series.

Description

Technical Field

[0001] The utility model relates to the technical field of safety switches, in particular to a safety sensor switch. Background Art

[0002] Magnetic induction proximity switches use magnetic induction generators as probes to detect the working status of the object being measured. Magnetic induction sensors have the advantages of small size, large inertia, and fast action. When magnetic induction proximity switches can be used as limit switches to replace travel switches that rely on collision contact, the reliability and service life of the system can be improved. However, for machines or equipment in harsh environments such as high temperature and high humidity, how to ensure stable and continuous operation is also an urgent problem to be solved. Utility Model Content

[0003] The utility model aims to provide a safety sensor switch, which is used to solve the problem that the prior art cannot adapt to harsh environments.

[0004] To solve the above technical problems, a technical solution adopted in the present application is: to provide a safety sensor switch for sensing signals and feeding back to a control device, comprising a first sensing circuit and a second sensing circuit connected in parallel, wherein the first sensing circuit comprises a first normally open reed switch and a first normally closed reed switch connected in series, and the second sensing circuit comprises a second normally open reed switch and a second normally closed reed switch connected in series.

[0005] As a preferred solution, a resistor R1 is further included, and the resistor R1 is connected between the first normally open reed switch K1 and the first normally closed reed switch K2.

[0006] As a preferred solution, a resistor R2 is further included, and the resistor R2 is connected between the second normally open reed switch K3 and the second normally closed reed switch K4.

[0007] As a preferred solution, a fuse F1 is further included, and the fuse F1 is connected between the resistor R1 and the first normally closed reed switch K2.

[0008] As a preferred solution, a fuse F2 is further included, and the fuse F2 is connected between the resistor R2 and the second normally closed reed switch K4.

[0009] As a preferred solution, a capacitor C1 is further included, and the capacitor C1 is connected between the resistor R1 and the fuse F1.

[0010] As a preferred solution, a capacitor C2 is further included, and the capacitor C2 is connected between the resistor R2 and the fuse F2.

[0011] The safety sensor switch provided by the utility model is used for sensing signals and feeding back to the control device, and includes a first sensing circuit and a second sensing circuit connected in parallel. When the device is working and the safety sensor switch is not close to the trigger, the first normally open reed switch K1 of the first sensing circuit and the second normally open reed switch K3 of the second sensing circuit are in a normally open state, and the first sensing circuit and the second sensing circuit are cut off without feedback. When the device is working and the safety sensor switch is close to the trigger without deviation, the first normally open reed switch K1 of the first sensing circuit and the second normally open reed switch K3 of the second sensing circuit are in a normally closed state. At the same time, since the first normally closed reed switch K2 of the first sensing circuit and the second normally closed reed switch K4 of the second sensing circuit are in a normally closed state, the loops of the first sensing circuit and the second sensing circuit are connected, and the feedback signal is given to the control device. When the device is working, the safety sensor switch approaches the trigger and deflects, the first normally open reed switch K1 of the first induction circuit and the second normally open reed switch K3 of the second induction circuit are in a normally closed state, the first normally closed reed switch K2 of the first induction circuit or the second normally closed reed switch K4 of the second induction circuit changes from a normally closed state to a normally open state, and the changed circuits in the first induction circuit and the second induction circuit are cut off. Therefore, the safety sensor switch of the utility model has three states, one is that the first induction circuit and the second induction circuit in parallel are both cut off, the other is that the first induction circuit and the second induction circuit in parallel are both turned on, and the other is that the first induction circuit or the second induction circuit in parallel is turned on or cut off. On the one hand, when the third situation occurs, the safety sensor switch can still feedback one signal to ensure the normal operation of the device, and can judge whether the safety sensor switch is faulty according to the situation, and can be replaced or repaired in time. On the other hand, it can be judged whether the device is working normally according to whether the feedback signal is one or two, and if a deviation occurs, it can be corrected in time. The utility model can adapt to high temperature and high humidity environments, and can ensure the stable and continuous operation of the equipment even if problems occur in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the utility model will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The utility model is a circuit principle diagram of a safety sensor switch according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments to be described below are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0015] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0016] It should also be understood that the terms used in this utility model embodiment specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model embodiments. As used in the utility model embodiment specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0017] Please refer to Figure 1 An embodiment of the utility model provides a safety sensor switch for sensing signals and feeding back to a control device, including a first sensing circuit and a second sensing circuit connected in parallel, the first sensing circuit including a first normally open reed switch and a first normally closed reed switch connected in series, and the second sensing circuit including a second normally open reed switch and a second normally closed reed switch connected in series.

[0018] Furthermore, a resistor R1 is included, and the resistor R1 is connected between the first normally open reed switch K1 and the first normally closed reed switch K2.

[0019] Furthermore, a resistor R2 is included, and the resistor R2 is connected between the second normally open reed switch K3 and the second normally closed reed switch K4.

[0020] Furthermore, it also includes a fuse F1, which is connected between the resistor R1 and the first normally closed reed switch K2.

[0021] Furthermore, it also includes a fuse F2, and the fuse F2 is connected between the resistor R2 and the second normally closed reed switch K4.

[0022] It is understandable that the fuse F1 can effectively ensure the stable operation of the first induction circuit, and the fuse F2 can effectively ensure the stable operation of the second induction circuit. Specifically, under a switching voltage environment of up to 260V, it can still work effectively and stably.

[0023] The safety sensor switch provided by the utility model is used for sensing signals and feeding back to the control device, and includes a first sensing circuit and a second sensing circuit connected in parallel. When the device is working and the safety sensor switch is not close to the trigger, the first normally open reed switch K1 of the first sensing circuit and the second normally open reed switch K3 of the second sensing circuit are in a normally open state, and the loops of the first sensing circuit and the second sensing circuit are cut off without feedback. When the device is working and the safety sensor switch is close to the trigger without deviation, the first normally open reed switch K1 of the first sensing circuit and the second normally open reed switch K3 of the second sensing circuit are in a normally closed state. At the same time, since the first normally closed reed switch K2 of the first sensing circuit and the second normally closed reed switch K4 of the second sensing circuit are in a normally closed state, the loops of the first sensing circuit and the second sensing circuit are connected, and the feedback signal is given to the control device. When the device is working, the safety sensor switch approaches the trigger and deflects, the first normally open reed switch K1 of the first induction circuit and the second normally open reed switch K3 of the second induction circuit are in a normally closed state, the first normally closed reed switch K2 of the first induction circuit or the second normally closed reed switch K4 of the second induction circuit changes from a normally closed state to a normally open state, and the changed circuits in the first induction circuit and the second induction circuit are cut off. Therefore, the safety sensor switch of the utility model has three states, one is that the first induction circuit and the second induction circuit in parallel are both cut off, the other is that the first induction circuit and the second induction circuit in parallel are both turned on, and the other is that the first induction circuit or the second induction circuit in parallel is turned on or cut off. On the one hand, when the third situation occurs, the safety sensor switch can still feedback one signal to ensure the normal operation of the device, and has a high anti-interference ability, and can judge whether the safety sensor switch is faulty according to the situation, and can be replaced or repaired in time. On the other hand, it can be judged whether the device is working normally or whether a misdetection occurs according to whether the feedback signal is one or two, and if a deviation occurs, it can be corrected in time. In harsh working environments, machines and equipment are large in size. Once the safety sensor switch fails or misdetects, it may cause damage to the equipment at the least, or even personal accidents at the worst. The utility model can adapt to high temperature and high humidity environments, and can ensure stable and continuous operation of the equipment even if problems occur in time.

[0024] In some embodiments, the safety sensor switch of the utility model further includes a capacitor C1, one end of which is connected between the resistor R1 and the fuse F1, and the other end is grounded. It also includes a capacitor C2, one end of which is connected between the resistor R2 and the fuse F2, and the other end is grounded.

[0025] It should be noted that the above embodiments are applied in machines and equipment mainly for safety, so during the detection process, they need to respond quickly and feedback to the control device. However, for some machines and equipment that do not require fast response and feedback, the capacitors C1 and C2 can further improve the reliability of the first induction circuit and the second induction circuit to prevent large currents from damaging the loop, and they have the function of delayed response and feedback.

[0026] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

[0033] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A safety sensor switch for sensing signals and feeding back to a control device, characterized in that: It comprises a first induction circuit and a second induction circuit connected in parallel, wherein the first induction circuit comprises a first normally open reed switch and a first normally closed reed switch connected in series, and the second induction circuit comprises a second normally open reed switch and a second normally closed reed switch connected in series.

2. The safety sensor switch according to claim 1, characterized in that: The device further comprises a resistor R1 connected between the first normally open reed switch K1 and the first normally closed reed switch K2.

3. The safety sensor switch according to claim 1, characterized in that: A resistor R2 is also included, and the resistor R2 is connected between the second normally open reed switch K3 and the second normally closed reed switch K4.

4. The safety sensor switch according to claim 2, characterized in that: The device further comprises a fuse F1 , which is connected between the resistor R1 and the first normally closed reed switch K2 .

5. The safety sensor switch according to claim 3, characterized in that: The circuit also includes a fuse F2 connected between the resistor R2 and the second normally closed reed switch K4.

6. The safety sensor switch according to claim 4, characterized in that: The device further comprises a capacitor C1 , which is connected between the resistor R1 and the fuse F1 .

7. The safety sensor switch according to claim 5, characterized in that: The device further comprises a capacitor C2, wherein the capacitor C2 is connected between the resistor R2 and the fuse F2.

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