CN212163303U - proximity switch - Google Patents

Abstract

The utility model relates to a proximity switch, which comprises a shell, a central control component, an induction coil and a light-transmitting protective cover; the shell is provided with an accommodating cavity; the central control assembly comprises a circuit board and a cable connected with the circuit board; the circuit board is correspondingly arranged in the accommodating cavity; the induction coil is electrically connected with the circuit board and arranged at one end of the mounting part far away from the wiring part; the light-transmitting protective cover covers the outer side of the induction coil; the light-transmitting protective cover comprises a light-transmitting part, a light guide part connected with the light-emitting part and a light-emitting part inserted in the light guide part; the light-emitting piece is electrically connected with the circuit board. Above-mentioned proximity switch leads the printing opacity portion through setting up the light guide part with the light that the illuminating part sent to enlarge the light that the illuminating part sent through printing opacity portion, and then guarantee the convenience and observe the light that the illuminating part sent, guarantee the reliability of construction.

Description

proximity switch

technical field

The utility model relates to the technical field of detection, in particular to a proximity switch.

Background technique

Proximity switch, also known as non-contact proximity switch, is an ideal electronic switch sensor. It is widely used in machine tools, metallurgy, chemical industry, textile and printing industries. It can be used as limit, technology, positioning control and automatic protection, etc. When the proximity switch is used, when the metal detection body is close to the sensing area of the proximity switch, the switch can quickly send out electrical commands without contact, pressure, spark, and accurately respond to the position and stroke of the moving mechanism.

The existing proximity switch needs to inform the construction personnel when an object is detected. The existing method is to set an opening on the shell, and by setting an indicator light through the opening on the circuit board, the construction personnel can observe the indicator light on and off. Know the detection status of the proximity switch; but because the shell is made of metal material, and the side of the proximity switch has holes for light to pass through, it is easy to fail to observe the on-off status of the indicator light, and thus the detection status of the proximity switch cannot be known. , affecting the construction.

Utility model content

Based on this, it is necessary to provide a proximity switch for the problem that the indicator light is on and off is inconvenient to observe and affect the construction.

A proximity switch comprising:

a housing, the housing is provided with an accommodating cavity; the housing includes an installation part and a wiring part; the accommodating cavity extends from the installation part to the wiring part;

a central control assembly connected to the housing; the central control assembly includes a circuit board and a cable connecting the circuit board; the circuit board is correspondingly arranged in the accommodating cavity;

an induction coil, connected to the central control assembly, the induction coil is electrically connected to the circuit board, and the induction coil is arranged at one end of the mounting portion away from the wiring portion; and

A light-transmitting protective cover is connected to the housing, and the light-transmitting protective cover is arranged on the outside of the induction coil; the light-transmitting protective cover includes a light-transmitting part, a light-guiding part connected to the light-transmitting part, and a light-emitting element inserted in the light guide part; the light-emitting element is electrically connected with the circuit board.

The above-mentioned proximity switch guides the light emitted by the light-emitting element to the light-transmitting portion by setting the light-guiding portion, and amplifies the light emitted by the light-emitting element through the light-transmitting portion, thereby ensuring the convenience of observing the light emitted by the light-emitting element and ensuring the reliability of construction. By arranging the light-transmitting protective cover on the outer side of the induction coil, it is ensured that the end of the proximity switch provided with the induction coil emits light for indication, which further improves the observation convenience of the detection state of the proximity switch.

In one embodiment, the light-transmitting portion is arranged in a hollow cylindrical structure, and the light-guiding portion is arranged in the light-transmitting portion.

In one embodiment, the light guide portion extends from the light transmission portion toward the circuit board in a cylindrical shape, and the central axis of the light guide portion and the light transmission portion are collinear.

In one embodiment, an embedded groove is provided in the light-transmitting portion, the embedded groove extends from an end of the light-transmitting portion close to the circuit board to the inside of the light-transmitting portion, and the embedded groove surrounds the light-transmitting portion. The induction coil is arranged outside the light guide portion, and the induction coil is correspondingly embedded in the embedding groove.

In one embodiment, the light-emitting element is disposed at the end of the light-guiding portion away from the light-transmitting portion; the light-emitting element is provided with a feeler, and the feeler is elongated from the light-emitting element toward the light-emitting element. The circuit board is extended in the direction, and the antenna is electrically connected with the circuit board.

In one embodiment, the induction coil is arranged in a ring-shaped structure, the induction coil is arranged around the outer side of the light guide portion, and the light guide portion passes through the induction coil correspondingly.

In one of the embodiments, the mounting portion is provided in an annular structure, the outer side of the mounting portion is provided with a thread, and the mounting portion is arranged around the outer side of the circuit board.

In one embodiment, the wiring portion is disposed at one end of the mounting portion, the wiring portion and the mounting portion extend in the same direction, and the cable passes through the wiring portion correspondingly.

In one embodiment, a torsion block is provided at the connection position between the cable and the wiring part; the torsion block is sleeved on the outer side of the cable, and the torsion block is arranged on the part of the wiring part away from the installation part. one end.

In one embodiment, a sealant is disposed in the accommodating cavity, and the sealant is wrapped and attached to the outside of the circuit board and the induction coil.

Description of drawings

1 is a schematic cross-sectional view of a proximity switch according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the light-transmitting protective cover in FIG. 1 .

The meanings of the symbols in the attached drawings are:

100. Proximity switch;

10. Housing; 11. Receiving cavity; 15. Mounting part; 16. Wiring part;

20. Central control assembly; 21. Circuit board; 22. Cable; 25. Torsion block;

30. Induction coil;

40, light transmission protective cover; 41, light transmission part; 42, light guide part; 43, light-emitting part; 45, embedded groove; 46, antenna.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not subject to the specific embodiments disclosed below. limit.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" ", "radial", "circumferential" and other indicated orientations or positional relationships are 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, rather than indicating or implying the indicated A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Please refer to FIG. 1 and FIG. 2 , a proximity switch 100 according to an embodiment of the present invention includes a housing 10 , a central control assembly 20 connected to the housing 10 , an induction coil 30 connected to the central control assembly 20 , and a housing 10 . The light-transmitting protective cover 40 connected to the body 10; the proximity switch 100 is used to detect the working position of the external device. When the external device approaches the proximity switch 100, the proximity switch 100 is correspondingly triggered, and an electrical signal is sent out. The electrical signal corresponds to detecting the working state of the external device to ensure the control operation of the external device.

The housing 10 is arranged in a horizontal direction in a hollow structure, and the housing 10 is arranged on the outer side of the proximity switch 100; the housing 10 is provided with an accommodating cavity 11, and the accommodating cavity 11 is arranged in a circular groove-like structure, The accommodating cavity 11 extends from one end of the casing 10 to the interior of the casing 10 . The housing 10 includes a mounting portion 15 and a wiring portion 16; the mounting portion 15 is used for connection and fixing with the outside world, the wiring portion 16 is provided at one end of the mounting portion 15, and the wiring portion 16 is used for the external cable 22 to pass through the housing Inside the body 10 , the accommodating cavity 11 extends from the mounting portion 15 toward the wiring portion 16 . In this embodiment, the mounting portion 15 is arranged in a ring-shaped structure, the mounting portion 15 is extended in the horizontal direction, and the outer side of the mounting portion 15 is provided with a thread to connect the mounting portion 15 with the external thread, and then the housing The body 10 is connected and fixed with the outside world; the wiring portion 16 is arranged at one end of the mounting portion 15 , and the wiring portion 16 and the mounting portion 15 extend in the same direction.

The central control assembly 20 is correspondingly connected to the housing 10 , and the central control assembly 20 includes a wiring board and a cable 22 connecting the wiring board. The wiring board is correspondingly arranged in the accommodating cavity 11 , the wiring board is in the shape of a rectangular straight plate extending in the horizontal direction, the mounting portion 15 is arranged around the outer side of the wiring board 21 ; the cable 22 is extended in the shape of a circular strip , the cable 22 is connected to one end of the circuit board 21 , the cable 22 is electrically connected to the circuit board 21 , the cable 22 is used to transmit electrical signals, and the cable 22 corresponds to the wiring portion 16 . In this embodiment, a twist block 25 is provided at the connection position of the cable 22 and the wiring portion 16 , the twist block 25 is arranged at the end of the wiring portion 16 away from the mounting portion 15 , and the twist block 25 is sleeved on the cable 22 . Outside, the torsion block 25 extends from the wiring portion 16 to the direction away from the wiring portion 16 in a gradually shrinking shape. The torsion block 25 is used to improve the connection reliability between the cable 22 and the housing 10 . Further, the accommodating cavity 11 is provided with sealant, and the sealant is wrapped around the outside of the circuit board 21 and the induction coil 30 . stability while preventing breakdown between circuits.

The induction coil 30 is connected to the central control assembly 20 , the induction coil 30 is electrically connected to the circuit board 21 , the induction coil 30 is arranged at one end of the mounting portion 15 away from the wiring portion 16 , the induction coil 30 is arranged in a circular structure, and the induction coil 30 is arranged in a circular structure. The coil 30 and the mounting portion 15 are extended in the same direction. The induction coil 30 is used to sense an approaching external device, and the approaching external device correspondingly causes the magnetic field generated by the induction coil 30 to change, thereby generating an induced current in the induction coil 30. The induction The coil 30 transmits the generated induced current to the circuit board 21, and the circuit board 21 amplifies and filters the induced current to ensure identification by external devices.

The light-transmitting protective cover 40 is connected to the housing 10 , and the light-transmitting protective cover 40 is covered on the outside of the induction coil 30 ; the light-transmitting protective cover 40 includes a light-transmitting portion 41 , a light-guiding portion 42 connected to the light-transmitting portion 41 , and The light emitting element 43 inserted in the light guide portion 42 . The light-transmitting portion 41 is arranged in a hollow cylindrical structure. The light-transmitting portion 41 is covered on the outer side of the induction coil 30 . The light-transmitting portion 41 is connected to the peripheral edge of the mounting portion 15 away from the wiring portion 16 . The light guide portion 41 extends in the same direction as the mounting portion 15 ; the light guide portion 42 is cylindrical and extends in the horizontal direction, the light guide portion 42 extends from the light transmission portion 41 to the circuit board 21 , and the light guide portion 42 is connected to the light transmission portion 41 . The light portion 41 extends in the same direction, and the light guide portion 42 and the central axis of the light transmission portion 41 are collinear; In the light portion 42, the light-emitting element 43 is used to emit light when the induction coil 30 senses an external device. In this embodiment, the light-transmitting portion 41 is provided with an embedded groove 45 , and the embedded groove 45 extends from one end of the light-transmitting portion 41 close to the circuit board 21 to the inside of the light-transmitting portion 41 , and the embedded groove 45 surrounds the light-transmitting portion 41 . The induction coil 30 is arranged on the outer side of the light guide portion 42, and the induction coil 30 is correspondingly embedded in the embedding groove 45; further, the light-emitting element 43 is provided with a feeler 46, and the feeler 46 is elongated and extends in the horizontal direction. The antennae 46 extend from the light-emitting element 43 toward the circuit board 21 , and the antennae 46 are electrically connected to the circuit board 21 . The number of the antennae 46 is two, and the two antennae 46 extend in parallel; the light-emitting element 43 is an LED chip.

The aforementioned proximity switch 100 guides the light emitted by the light-emitting element 43 to the light-transmitting portion 41 by providing the light-guiding portion 42, and amplifies the light emitted by the light-emitting element 43 through the light-transmitting portion 41, thereby ensuring that the light emitted by the light-emitting element 43 is convenient for the light-emitting element 43 to emit. Observation is carried out to ensure the reliability of construction; by covering the light-transmitting protective cover 40 on the outside of the induction coil 30, it is ensured that the end of the proximity switch 100 provided with the induction coil 30 is illuminated to indicate, and the detection state of the proximity switch 100 is further improved. Ease of observation.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present utility model, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. A proximity switch, characterized in that, comprising: a housing, the housing is provided with an accommodating cavity; the housing includes an installation part and a wiring part; the accommodating cavity extends from the installation part to the wiring part; a central control assembly connected to the housing; the central control assembly includes a circuit board and a cable connecting the circuit board; the circuit board is correspondingly arranged in the accommodating cavity; an induction coil, connected to the central control assembly, the induction coil is electrically connected to the circuit board, and the induction coil is arranged at one end of the mounting portion away from the wiring portion; and A light-transmitting protective cover is connected to the housing, and the light-transmitting protective cover is arranged on the outside of the induction coil; the light-transmitting protective cover includes a light-transmitting part, a light-guiding part connected to the light-transmitting part, and a light-emitting element inserted in the light guide part; the light-emitting element is electrically connected with the circuit board. 2 . The proximity switch according to claim 1 , wherein the light-transmitting portion is arranged in a hollow cylindrical structure, and the light-guiding portion is arranged in the light-transmitting portion. 3 . 3 . The proximity switch according to claim 2 , wherein the light guide portion extends from the light transmission portion toward the circuit board in a cylindrical shape, and the light guide portion and the light transmission portion are arranged in a cylindrical shape. 4 . The central axes are collinear. 4 . The proximity switch according to claim 3 , wherein an embedded groove is arranged in the transparent portion, and the embedded groove extends from an end of the transparent portion close to the circuit board to the inside of the transparent portion. 5 . Extending arrangement, the embedding groove is arranged around the outside of the light guide portion, and the induction coil is correspondingly embedded in the embedding groove. 5 . The proximity switch according to claim 1 , wherein the light-emitting element is disposed at one end of the light guide portion away from the light-transmitting portion; the light-emitting element is provided with a feeler, and the feeler is long. 6 . The strip shape extends from the light-emitting element toward the circuit board, and the antenna is electrically connected to the circuit board. 6 . The proximity switch according to claim 1 , wherein the induction coil is arranged in a ring-shaped structure, the induction coil is arranged around the outside of the light guide portion, and the light guide portion passes through the light guide portion correspondingly. 7 . Induction coil. 7 . The proximity switch according to claim 1 , wherein the mounting portion is arranged in a ring-shaped structure, the outer side of the mounting portion is provided with a thread, and the mounting portion is arranged around the outer side of the circuit board. 8 . . 8 . The proximity switch according to claim 7 , wherein the wiring portion is provided at one end of the mounting portion, the wiring portion and the mounting portion are extended in the same direction, and the cables are correspondingly passed through. 9 . the connection part. 9 . The proximity switch according to claim 1 , wherein a twist block is provided at the connection position between the cable and the wiring part; the twist block is sleeved on the outer side of the cable, and the twist block is provided with the twist block. 10 . at one end of the wiring portion away from the mounting portion. 10 . The proximity switch according to claim 1 , wherein a sealant is provided in the accommodating cavity, and the sealant is wrapped around the outside of the circuit board and the induction coil. 11 .

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